ISSN 0085-4417 NUYTSIA Bulletin of the Western Australian Herbarium Edited by A. S. George Vol. 2 No. 2 1976 Department of Agriculture of Western Australia .t ISSN 0085—4417 NUYTSIA Bulletin of the Western Australian Herbarium Edited by A. S. George Vol. 2 No. 2 1976 Department of Agriculture of Western Australia ( 1)— 52816 Two new species of Acacia from Western Australia By Mary D. Tindale* and B. R. Maslin + Abstract Two new species of Acacia endemic to Western Australia are described: A. citrinoviridis sp. nov. and A. suhtessarogona sp. nov. Both belong to Ben- tham’s series Juiiflorae. Introduction Due to the pending publication of a further section on the phytochemistry of Australian Acacia species by Prof D. G. Roux and Dr. Tindale, it is necessary to provide names for these two new Western Australian taxa. Specimens cited in the text are located at the Western Australian Her- barium (PERTH) unless otherwise indicated. Acacia citrinoviridis Tindale et Maslin sp. nov. (Figures I, 3C and D, 4). Acaciae aciunimitae Benth. alTinis, a qua diffcrt ramulis manifestc porcatis, inarginibus phyllo- diorum nonciliaiis. phyllodiis minus slriatis, sed costa prominenli ct vcnis 2 minus prominen- tibus axi parallelis, floribus 5-meris, leguminibus slrictis vel raro parum inter semina con- strictis, multo latioribus (0-7-1 -5 cm latis), inarginibus prominentioribus (1-2-1 -5 mm latis) et pracsertim juventute pilis lucentibu.s citrino-viridibus dense vestitis. Allied to Acacia acaminata Benth. from which it differs in the prominently ridged branch- lets, the margins of the phyllodes non-ciliate. the phyllodes le.ss striate hut with a prominent midrib and 2 less prominent veins parallel to the axis, the Dowers 5-merous, the legumes straight or rarely slightly constricted between the .seeds, much broader (0-7-1 -5 cm broad), the margins more prominent (1-2-1 -5 mm broad) and especially in the young condition densely clothed with glistening, citron-green hairs. Type: Fortescue River crossing. E. of Millstream homestead, II June 1972, B. R. Maslin 2735 (holo; PERTH; iso; CANB, K, L, MEL, NSW, NY, PERTH). Tree to 7-8 m high; young plants forming dense bushes often with some- what drooping branches; bark grey, fissured on trunk and main branches; hranclilels red-brown, glossy, with prominent, fawn, longitudinal ribs, clothed between them with fugacious, short, grey, appressed hairs; young shoots very densely clothed with iridescent citron-green hairs. Mature phyllodes very narrowly elliptical, 8-12 cm long, 0-5-1 -2 cm broad, falcate, silvery greyish green, densely clothed with antrorsely appressed, short hairs, often slightly twisted at the base; niidrih fairly prominenl. with 2 less prominent veins parallel to the costa as well as numerous, parallel minor veins, all arising from the base of the phyllode; margins non-ciliate; apiculum curved, obtuse, hard, thickened and sometimes knob-like; pulvinus 4-6 mm long, transversely rugose, clothed with short, appres.sed. grey hairs. Gland small, round or oblong", situated on the upper margin of the phyllode 1-1 -5 mm above the pulvinus or rarelv half- way between the apiculum and the pulvinus. Flower-heads spicate, l-2'in the axils of the phyllodes. 1 -3-3-2 cm long; q.v/.v with a dense yellow tomentum; peduncles 2-4-5 mm long, densely clothed with tomentose, yellowish green hairs. Flowers 5-merous; cedyx c. 0-9 mm long, divided almost to the base Figure 1. Acacia citrinoviridis. A— Upper portion of branch. B— Phvllode base showing obscure gland (g), pulvinus (p), midrib (m), and fine secondary veins (s). C— Flower. D— Petal. E— Sepal. F—Flowering spike (flowers removed) showing minute peduncle (pd) and densely (golden) hairy axis (a). G— Legumes. H —Seed (side view). 1— Seed (end view). A. C-F from B. R. Maslin 2764A; B and G from A. Robinson s.n.; H and I from G. & E Scott s.n. * Royal Botanic Gardens, Sydney, Australia 2000. t Western Australian Herbarium, South Perth Australia 6151. 86 87 into club-shaped, villous sepals; corolla divided to almost half its length into densely villous petals which are c. 1 -2 mm long and c. 0-5 mm broad at the base; stamens I -5-2 mm long; ovary brown, c. 0-8 mm long, c. 0-4 mm broad, clothed with villous yellow hairs; style yellow, c. 1 mm long. Legumes 3-5- 8 cm long, 0-7-1 -5 cm broad, straight or very rarely slightly constricted between the seeds, hard and brittle, light brown or yellowish, rugose, densely clothed especially in the young condition with fugacious, glistening, slightly matted, citron-green hairs; margins prominent. 1-2-1 -5 mm broad. Seeds 3-8, black or dark brown, almost globose, compressed, c. 5 mm diam.; pleuro- gram central, continuous; areole oval, cream-coloured to dark green, c. I mm \ong; fum'ele filiform, cream-coloured with 2 folds, very slightly dilated into an aril. Distrihution and hahitat: (Figure 4) North-west Western Australia; extending from the vicinity of Shark Bay north-cast to the Fortescue River. This species occurs as far west as Nanutarra (between Roebourne and Carnarvon), while a line from Marble Bar to Wiluna represents the approximate eastern limit of its known distribution. Although A. eitrinoviridis is normally found along creeks and rivers with sandy rocky beds, it also grows in stony soil away from the water- courses. Western Australia; Millslream, M. t. H. Brookcr 2071; Weeli Walli Creek. Witlenoom area, y. V. lihckley 20.t; Nanutarra Bridge, .Ashburton River. B. Matonev NSW 107190 (K, NSW), wood voucher for phylochemical survey: Nanutarra Bridge, Ashburton River crossing North West Coastal Highway, B. R. Mastin 2764A (AD. BRI, NSW, PERTH, US); Between Mundiwindi and Roy Hill, ./. S. Beard 4600; Kookhabinna Gorge, A. Rohinson s.n.. Sept. 1959; Pingandic Station, Ashburton district, (7. & C. Scott s.n., 1971 ; Tom Price, h LuUfitz NSW I044I4 (K, NSW); Mt. Augustus Station, J. S. Beard MW (NSW, PERTH); Peak Hdl road. O’. E. Brockway 10; Glenburgh Station, 1 50 mi 1 240 km] E. of Carnarvon,./. S Beard 4354. Flowering and fruiting period: According to Mr. G. Scott (pers. comm.) this species only flowers in a good season following summer or winter rains. Flower- ing material examined by the authors ranged from late April to June and fruiting specimens from late April to September. This species superficially resembles Acacia acuminata Benth. which is commonly known as “Jam”, hence the name “River Jam” for A. eitrinoviridis. Both taxa are members of the Julinorae-Falcatac (Bentham, 1864). Acacia eitrinoviridis is known as the “Milhan” tree in the Ashburton district but “Wanlan” in the Murchison-Gascoyne region. The aborigines coarsely grind the dry seeds of this wattle and eat them uncooked (Scott, 1972). The specific epithet refers to the citron-green hairs occurring on the young shoots and legumes of this wattle. Acacia subtessarogona Tindale et Maslin sp. nov. (Figures 2, 3A and B, 4). Acaciae hrachystachyae F. Muell. afTinis, a qua dilTert phyllodiis latioribus (4-9 mm latis) jnflorescenln.sjunioribu$ subsessilibus e phyllodiorum axillis \ 5 ortis, leguminibus plerumque ongioribus (6-12 cm longis) plus minusve (etragonis lignosioribus. leguimnum paginis lateral]- bus SLilcatis. Allied to Acaaa hruchystachya F. Muell. from which it differs in the broader phyllodes (4-9 mm broad), the young mnorescences subsessile and 1-5 borne in the axils of the phyllodes the legumes longer (6-12 cm long), more or less telragonous, more woodv, the lateral sides' of the legumes sulcale. Australia, 10 Oct. 1941, C. A. Gardner Figure 2. Acaaa sithtessaroiroiia. A— Upper portion of branch. B— Flower bud showing linear^pathulate sepals (s). C- -Phyllode base showing pulvinus (p) and obscure gland (g), D-Seed^ E— Legume valve (with few seeds-remainder dehisced) showing broad margin (m). F— Legume showing broad margin (m) and surface striations (st) ^R^M ^ ^ (Gardner 6224 (the type); D from 88 89 Figure 3. Acacia xiihics.saroooiia (A habit. B— bark); A. chrinovirkHs (C -habit, D--bark). A and H from H. R. MasUn 2768; C and 17 from R. R. Maslin 2735 (the type). Small tree or tall spreading sitnih usually 5-8 m high: bark grey, fissured near the base of the main trunk, smooth on the branches; young hranelilets with light brovMi ridges, the surface between them dark red-brown, clothed mainly on this surface with very short, grey, appressed hairs. PIni/ocles very narrowly elliptical, 7-13 cm long. 4-9 mm broad, falcate, pale green, coriaceous, clothed with short, appressed, silvery hairs mainly between the veins; midrib often not readily distinguished from the numerous parallel minor veins, all arising from the base of the phyllode; apicuhim hard, rounded, often knob-like; pulvinus 2-3 mm long, transversely rugose, clothed with very short, grey, appressed hairs. Gland small, oval, situated on the upper margin of the 90 phyllode 1 '5-5 mm above the pulvinus. Young flower-heads subsessile, 1-5 clustered in the axils ot the phyllodes. Flower-heads shortly spicate to globose, 6-12 mm long, 4—8 mm broad; peduncles comparatively elongated in mature flower-heads, 4-5-8 mm long, clothed with short, closely appressed, grey hairs. Bracts at the base of peduncles very broadly ovate, brown, ciliolate. Bracleoles with fimbriate claws; laminae peltate and fimbriate. Flowers 5-merous; calvx c. I mm long, divided to the base into very narrow, club-shaped sepals clothed with pale yellow hairs; corolla divided one third to one half of its length into glabrous petals which are c. 2 mm long and c. O-H mm broad, petals swollen at their apices which bear a tuft of papillae, the margins granulose and the median stripe inconspicuous; stamens c. 2-3 mm long; orary subsessile, brown, c. 0-7 mm long; stigma slightly expanded. Legumes 6-12 cm long, subtetragonous, with the upper and lower surfaces sulcate and 2-3 mm broad, grey, hoary, ornamented with light brown, longitudinal veins with some reticulations. Seeds up to 8 and longitudinal in each legume, obloid-compressed, 5-6-5 mm long, 3-3-5 mm broad, dark brown; pleurogram small, central, light brown, horseshoe-shaped; areole dark brown, 0-3-0-6 mm \ong', fun icie fawn, con- voluted, filiform, expanded into an aril on top of the seed. Figure 4. Distribution of A. citrinoviridis (•) and A. suhtessarogona (■). 91 Distribution and habitat: (Figure 4) North-west Western Australia: most collec- tions of this species have been made from between Winning Station (210 km north-east of Carnarvon) and Gascoyne Junction (160 km east of Carnarvon): there is also one record of this plant from the Wiluna district which is about 400 km south-east of the main area of distribution. This species commonly grows on red loamy soil in low-lying areas often in association with A. sclerosperrna F. Muell. and A. tetragonophylla F. Muell. It has also been collected from higher rocky ground in association with A. ancistracarpa Maiden and Blakely. Western Australia: Wogoola Station, Ashburton River, C. A, Gardner 3188; Winning Pool Station, 53 km S of Barradale on North West Coastal Highway, B. R. Mastin 2768 (BRI, NSW, NY, PERTH); 75 Mile Post N of Carnarvon, S. Beard 3492; Wiluna area, J. Morrissey 62; Gascoyne River, 80 miles [129 km] E of Carnarvon, C. A. Gardner 6041. Flowering and fruiting period: Flowers from July to September; mature legumes present from September to December. As outlined earlier in this paper on p. 88, A. subtessarogona is closely allied to A. brachystachya Benth. The latter species together with A. cibaria F. Muell., A. linophylla W. V. Fitzg. and A. ramulosa W. V. Fitzg. form an interrelated taxonomic complex which has a very wide range in Australia. Acacia subtessarogona is most readily distinguished from the above four taxa by the subtetragonous, almost “squashed” character of its mature legumes. The specific epithet refers to the subtetragonous fruit in this wattle. Acknowledgments We wish to express our appreciation to Mr. H. K. Airy Shaw for checking the Latin diagnoses, as well as to Mr. G. Scott for very helpful field observations about A. citrinoviridis. References Bentham, G. (1864). Flora Australiensis, Vol. 2. Reeve. London. Scott, Marjorie P. (1972). Some Aboriginal food plants of the Ashburton district, Western Australia. W.A. Nat. 12 (4):94-96. 92 Ptilotus gardneri Ben! sp. nov. (Amaranthaceae) By G. Beni, F.L.S.* Abstract A new species of Pliloliix, Pi. gardneri Beni, is described from Western Australia. It resembles Pt. clemcntii (Farmar) Beni, but its pubescence in stems and leaves is fundamentally different. Ptilotus gardneri Beni sp.nov. (Figures I and 2). Descriptio. Perennis valida robusta lanuginosa. Canle.y singuli stricti-erecti plus quam 30 cm alti ct 4 mm diametro, sulcati, basim versus lignosi, per totam longiludinem foliati, ramosi, ramulis pluribtis ex axillis foliorum orientibtis Pube.scentia baud hirsuti-villosa, sed sicut tomentum molle: pilis nodosis 1.5-2 mm longis crispis, inter se intricatis. folia caulina alterna 0,7- 1,5 cm distantia (sub)sessilia, laminis oblongi-lanceolatis ad 4,5:1,4 cm longis latisque, nervo medio subtus conspicuo in mucronem ad 0,5 mm longiim producto; utrimque pilis (ut in caulibus) dense vestita. Infiore.s-ceiitiae amplae, in speciminibus exstantibus sordide (viridi-)canescentes. flares permuiti in spicas solitarias. ad 8,5 cm longas et 4,3 cm diametro, conici-cylindraceas, termi nales, postea cernuas. denique nutantes congesti. Rhachis conspicue villosa, pilis niveis circiter 3 mm longis visu fasciculatis. Braeu-a bractcolaeqtw in latcribus .scariosac et nitentes, integrae, uninerxiae. distincte carinatae— carina (alro)fusca , post lapsum perianihii super- stites, stibinacqualcs: Bractea rigidior, elongati-lanceolata ad 10:5,5 mm longa et lata, in cuspidem sensim angustata, imprimis carinam pilosiusculam versus ftiscescens. Bractcolae subcordati-concavae adpressac breviores (7:5 nun), distincte apiculatae, praeter carinam hyalinae, omnino glabrae. PeriaiUhitim clongatum rigidi-erectum, postea tepalis divergentibus stibcampanulati- patens, basim constriclam. callosam, conicam versus valde indurescens. fepala inferne fere libera in pseudolubum (ad 3,5 mm) intus nilidtim conniventia el ima basi aniilum parvum formantia, lanceolali-linearia. acuta (marginibus membranaceis superne involulis), tricostata, extus pilosa pilis irrcgulariter inserlis pallide flavescentibus subtilibus rcclis ariiculatis ad f> mm longis, apieem nudum (ad 2-5 mm) baud vel plus mintisve aequantibus . inaequiformia: 2 extima 17-18; 2 mm longa lalaque, intus glaberrima: 3 interiora paullum minora (15-16: I -5 mm) intus inferne lana alba undulati-crispata praccipue marginibus (sive uni margini tantum) orientc obsessa. Stamina 5 aequalia cl fertilia, basi cupulam subglabram, circiter 0-8 mm altam parte libera 0 15 mm. celerum anulo periantbii insidentem formantia. Pseiulosiaminodia lobuli- formia (Fig. Ic) 0-6-0 - 9: 0-2-0 -4 mm longa el lata, raro Integra, plerumque valde bssa et/vel bmbriata inlerposita. filamenra ligulata ad 1-2 cm longa, basi libera vix dilatata, superne subulata. .'Intlierae flavae lineari-oblongae I -8-2-0: 0-2 mm longae lataeque. Ovarium (Fig. la, b) primo clavatum dein ovoideum se.ssile. in parte superiore birsutum pilulis rectis (0-5 mm) basim siyli occullantibus , ad 2-8 mm longum ct I -8 mm diametro. Slyins plus mintisve centralis filiformis sigmoidetis. circiter 13 mm longus, inferne modice dilatatus et piles nonnullos paliilos ad 0-5 mm longos gerens; sligmate parvo papillose. Holotype of species: Western Australian Boundary Survey 1936-38. Low plant in rough limestone country. Lat. 17 30'5"; L. Stokes. 10 .lune I936(PLRTH). Material. The description is based on the hololype-sheel (Fig. 2) consisting of two plant fragments measuring 34 and 31 cm. respectively. Only one plant bears an inflorescence more or less complete; on the other the spike has already lost its flowers, thus showing the white, unusually long-haired and clustered indumentum of the rachis. Discussion. While Pt. clenienlii exhibits a villous pubescence all over stems and foliage, the new taxon mu.st be placed in a group of species characterised by a continuous and densely-tomentose coal. Further dilferences of diagnostic value are the less hairy bracts, the hairless bracteoles, the abruptly pilose ovary (Fig. la, b). and the S-shaped style with spreading hairs in its lower part. Con- trasting with Pt. clementii —^cc ■‘Australian Plants” 4 (1967); 1 15. Fig. 2a— the dilated intrastaminodial lobes are mostly considerably more fringed (Fig. Ic). Thus the plant is easily distinguished. * Botanisebe Staatssammlung, IVlunche:t, Germany 93 S-shaped bendings of the style have already been recorded '^i Ptilotus heckeriamis (F. Muell.) F. Muell., Pt. chortophytwn (Diels) Schinz ^/. nohilis (Lindlev ex Mitch.) F. Muell. emend. Beni, and Pt. polystachyus (Gaud.) F. Muell. emend. Beni. There is no closer relationship either between these species or between one ot them iiiid our new taxon. The plant is named in honour of the late Mr. Charles A. Gardener, lormei ly Government Botanist of Western Australia in Perth, who not only collected many Ptilolus specimens but also recognized several taxa as new. Ptilotiis yardneri can easily be included into my key to the genus, in Mitt. Bot.Miinchen 9: 135-176 (1971). Add in page 145: 20 Crisped hairs form a homogeneous tomenlose indumentum on the leaves. Single hairs not recognizable with the naked eye. . „ , u , (a) Leaves more hairy underneath, margin narrowly reflected. Spikes shor ei than 2 cm) with few (lowers, and composed in loose panicle; bracleoles ielalively large, golden: tepals (shorter than 10 mm) widely surpassed by their silky hairs. The tiny siaminal ring wilhoul any lobes; ovary hairless, style straight. See 8 - . rt. ei to- (b) Leaves equally pilose on both sides, margin not reflected. Flowerheads (longer than 5 cm) many-flowered, mostly terminal; bracteoles inconspicuous, tepals (at least 15 mm) not exceeded by their dorsal hairs. Staminal cup with pseudo- staminodial lobes, usually fringed; ovary with an apical pubescence, style with an S-shaped bending. — W.A. Pt. gewduevi Beni, in Nuytsio 2,2(1976). Figure 1. Ptilotiis gardneri Beni, a and b— Pistil in a younger and in an adult stage, c— Part of staminal cup (cupula) with pseudostaminodes. 94 PlUolus g»r ‘><^.. »b5 Figure 2. Ptiloliis ganineri Beni. Holotype-sheet. 95 Studies in the genus Acacia (Mimosaceae) — 5* — Miscellaneous new phyllodinous species — By B. R. Maslin Abstract Four new, endemic, Western Australian Acacia species are described; A, aiijiucliiosa sp. no\'„ A. a: gut i folia sp. nov., A. jacksonioides sp. nov. and A. xiimtiaiis sp. nov. These species belong to Bentham's division Phyllodineae. 1, Acacia anfractuosa Maslin sp. nov. Friilex vcl urhor parva ad 4 m alta, diflTusa, exilis; rami plerumque penduii, flexuosi. glabri vel slrigosi. Sripii/ac caducae, Phyllodia linearia, ad 170(200) mm ionga, 1-2 nim lata, inter veniis minute strigosis, in .scctionc transversali rhombea (ubi angu.sta) ad plana; costa nervisque marginalibus promincntibus; inter eos 1-3 nervi lenuiores. Gkms obscura in margine supera phy'lodii ad extrcniitatcm di.stalc puivini. Pediincidis 5-7(10) mm longis; capitidu globulosa ad leviter obloidea. I'lorae 5-merae. Lcgnmen lineare, ad 120 mm longum, I •5-2-5 mm latum. Semina in legumine longitudinalia, ellipsoidalia, 4-5-5 x I -5 mm. Type: 26 km E of Karalee on Great Ea.stern Flighwav, Western Australia, 15 December 1971, B. R. Maslin 2402 (holo; PERTH; iso: CANB, K. NY). Diffuse, openly branched, ralher spindly shntb or small tree to 4 m tall, either single-stemmed or dividing at groun ’ level into ca. 3 main trunks; bark grey, smooth but sometimes slightly roughened at base of trunk; branches often pendulous, flexuous. terete, obscurely ribbed on branchlets, glabrous or strigose (hairs densest around base of phyllodes and between ribs on branchlets). light brown to red-brown, soon becoming grey. Stipules caducous. Young shoots resinous, densely strigose. Mature phyllodes linear, to 170(200) mm long. 1-2 mm wide, simply curved or sometimes ; sigmoid, spreading, slightly resinous, minutely strigose between veins, olive-green to grey-greeiC rhombic in cross section (when narrow) to : flat; nihlrih and margiiial nerves prominent broad and yellowish, 1-3 liner nerves occur between each midrib and marginal nerve; apex sometimes uncinate, not pungent, brown; pulvinus cylindrical. 0- 5-1 -5 mm long, obscurely transversely wrinkled, minutely strigose. Gland obscure, situated on upper margin of phyllode at distal end of pulvinus, lamina tissue insignificantly swollen around the gland. Inflorescences simple, often arising from base of a new shoot within axil of phyllode, 1-2(3) per' node; peduncles 5-7( 10) mm long, minutely strigose (hair density variable), basal bract caducous solitary ovate and minute (ca. 0-5 mm long); receptacle obloid. I -5-3 mm long, densely puberulous to glabrescent; //mce/- heads bright yellow, globular to obloid, 7-8 mm long at anthesis, with 22-32 ; loosely arraneed flowers. Bracteoles Q 7~0-9 mm long, puberulous abaxially, claws linear, laminae ovate and mflexed. Flowers 5-merous; calyx | to ca. .1 length of corolla, divided for 1 Us length into oblong obtuse ci'liolate lobes, tube brown sparsely to densely puberulous and nerveless; petals ca. 2 mm long, connate for 1- i their length, glabrous, obscurely 1-nerved. Legumes linear, to 120 mm long, I - .5-2-5 mm wide, firmly chartaceous, slightly raised over seeds, obscurely longitudinally nerved, minutely silvery-strigose (ha'irs dense on young legumes) dark brown; margins somewhat contracted between seeds (indentations shallow- ly concave), marginal nerve scarcely thickened broad glabrous and yellowish Seeds longitudinal in legume, ellipsoid. 4-5-5 mm long, I -5 mm wide brown with cream-coloured mottlings, a dark brown line extends around periphery of seed, somewhat shiny; pleurogram horseshoe-shaped, open towards the hilum obscure; areole 0-5 mm long;,/i,/«;W»/v ca. 0-5 mm long, somewhat dilated towards the base. Gland inconspicuous, sometimes absent, situated on upper surface of phyllode at. or near distal end’ of pulvinus. Inflore-xcences simple, 1 per node; peduncles 5 mm long glabrous basal bract solitary and triangular; receptacle obloid. glabrous; flower heads globular, pale yellow, with 23-25 flowers. Bracteoles almost I mm long ± glabrous, claws oblong, laminae ovate and acute. Flowers 4-merous (m some heads a few flowers with 5 petals occur); calv.x ca. .)- length of petals divided for i-i its length into oblong minutely ciliolate'lobes tube glab- rescent: petals ca. I -2 mm long, connate for t their length, glabrous, nerveless- o\ary sessile, sparsely hairy. Legumes narrowly oblongr to 40 mm long’ 2-4 mm wide, somewhat chartaceous, slightly raised over seeds slightly curved’ glabrous to glabrescent, tan to grey-brown, narrowed at both ends" stipe 3 mm’ long; margins slightly contracted between seeds, barely thickened yellow Accffe longitudinal in legume, obloid to ellipsoid, ca. 3 mm long and 1 .8 mm wide brown, with a darker brown line extending around periphery of seed dull’ picurogram quite obvious, open towards the hilum; areole ca. 2-5 x 0-7 mm’ funicle filiform, abruptly expanded into a conical (although often compressed at apex), white aril. ^ 98 Distribution: (Figure 1) South-west Western Australia; known only from near East Mount Barren and Quoin Flead (K. Newbey. pers. comm.), about 10-30 km west of Hopetoun. Habitat: Grows in shallow sand over quartzite in low open heath. Western Australia: East Mount Barren, south ot Ravenslhorpe, C. A. Gardner and W. E. Blackall 1428 (PERTH); East Mount Barren, K. Newbey 1618 (G, NSW, PERTH). Flowering and fruiting period: Flowers intermittently from late July to January (K. Newbey, pers. comm.). Legumes containing mature seeds have been collected in early October. These were present on bushes that were just be- ginning their flowering period. Using Bentham’s classiheation ( 1 864) A. argutifolia occurs in the Pungentes- Uninerves but it is not closely related to the other members of this group. This species is most closely allied to A, sinndans Maslin from which it is readily distinguished by its scattered (not verticillate) phyllodes — see p. 101 below for a full discussion on these two species. The specific epithet refers to the characteristic sharp-pointed phyllodes. 3. Acacia jacksonioides Maslin sp. nov. Friilex 0-3-0 -6 ni altus, densus, intricatus, divaricate-ramosus, ramulis brevibus spinescenti- bus; rami nervali. glabri. Slipiilae caducae. Phyllodia leviter et oblique ovata ad oblonga vel elliptica, 3-5-8(10) x 2-5-4(5) mm, glabra, marginibus -- undulatis, costis prominentibus. Pednnciili 3-6 n-im longi, glabri; capinda globosa. Bracteulae nullae. Florae 5-merae Legnmen anguste oblongum, plerumque 25-30 mm longuni, 3 mm latum. Semina in legumine longiludinalia, obloidea, 2-2-5 x 1 -2-1 -7 mm. Type - Nalyaring Well, 20 km N of Kellerberrin towards Yelbeni, Western Australia, 16 July 1970, B. R. Maslin 592 (holo: PERTH; iso: CANB, K, NY). Dense, intricate, divaricately branched, rounded shrub 0-3-0 -6 m tall, with short, spinescent branchlets: branches slightly flexuose, terete, quite promi- nently ribbed (ribs yellow), glabrous, glaucous (when fresh). Stipules caducous. Phyllodes slightly obliquely ovate to oblong or elliptic, 3-5-8(10) mm long, 2 . 5 _ 4 ( 5 ) mm wide, patent or somewhat reflexed, glabrous, margins slightly thickened and normally undulate, midrib prominent, lateral veins very obscure, apiculum short somewhat sharp and dark brown: pulviniis ca. 0-5 mm long, obscurely wrinkled. Gland not prominent, situated on upper margin of phyllode 1-2 mm above the pulvinus. Inflorescence an extremely reduced raceme consisting of a single flower head, 1(2) per node; raceme axis minute (0- 1 mm long): peduncles 3-6 mm long, glabrous, subtended by 2 basal bracts: flower heads globular, yellow, with 10-14 [lowers. Bracteoles absent. Flowers 5-merous; calyx i to slightly less than k length of corolla, divided for ] it, length into obtuse glabrous or ciliolate lobes, lube nerveless and glabrous or glabrescent: petals 1-5-2 mm long, connate for ca. i their length but readily separating, very obscurely 1 -nerved, glabrous; ovary glabrous. Legumes nar- rowly oblong, mostly 25-30 mm long. 3 mm wide, firmly chartaceous, curved, slightly undulate, quite prominently raised over seeds (but bulged on one surface of legume only — opposite surfaces for adjacent seeds), glabrous, brown; marginal rib narrow, slightly contracted between seeds, pale coloured. Seeds longitudinal in legume, obloid, 2-2-5 mm long, I 2-1-7 mm wide, brown, shiny; pleurogram horseshoe-shaped, open towards the hilum; areole 0-7 mm \ong-, 'funicle filiform, abruptly expanded into a thickened, curved, pale yellow aril. Distribution: (Figure 1) Western Australia: wheatbelt region from near Coorow south-east to near Bruce Rock. Habitat: Gravelly sand or loam commonly on hilltops. 99 Western Australia: About 8 mi (12-9 km) N of Coorow, C. Chapman s.n., I July 1973 (PERTH); Yorkrakine, C. A. Gardner 8044 (BRI, MEL, PERTH, RSA); Ballidu, R. T. Lange 56 (PERTH); About 29 km due NW of Bruce Rock, B. R. Maslin 2364 (PERTH); About 37 km S of Moora towards Perth, B. R. Maslin 3275 (NSW, PERTH), Flowering anil fruiting period: Flowers in July and August; a few undehisced legumes remain on the bushes to mid- Decern her. According to Bentham’s classification (1864) A. jacksonioides occurs in the Uninerves-Spinescentes. At PERTH this species has previously been known as A. intricata S. Moore. However, it is not closely related to this species. Acacia jacksonioides is distinguished from A. intricata by its short, divaricate, spinescent branchlets, its larger, undulate, less rigid phyllodes, and its longer peduncles. The short, divaricate, spinescent branchlets, and relatively small phyllodes and flower heads render this new species similar to A. erinacea Benth. However, A. jacksonioides is readily recognized by its differently shaped, normally some- what undulate, more prominently nerved phyllodes, its much narrower legumes, and its longitudinally arranged seeds. In its phyllode morphology, A. jacksoni- oides is similar to A. semicircinaiis Maiden and Blakely ( Uninerves-Brevifoliae) but differs from this species in its divaricate, spinescent branchlets, and its smaller flower heads. The specific epithet alludes to the general similarity in branching pattern between the new species and some members of the genus Jacksonia e.g. J. hakeoides Meisn. and J. spinosa (Labill.) R.Br. 4. Acacia simiilans Maslin sp. nov. Friilex diffusus ad I in altus; ramuii (ereles, glabri vel sparsim antrorse strigosi. Slipuiae ca. 1 mm longae, Phyllodia verticillata 6-9-na, lineari-lelragona, 8-12 mm longa, patentia ad leviter rellexa, pungenlia. Gians mconspicua. Capitnia globulosa ad leviter obloidea. Florae 4-merae. Legumen : moniliforme, ad 70 mm longum, ad 4 mm latum. Semina iri legumine longiludinalia, obloidea, ca. 4 mm longa, 2-5-3 mm lata, brunnea. Type: About 1 -6 km due NW of Mount Bland, Fitzgerald River National Park Western Australia, 30 August 1973. B. R. Maslin 3483 (holo: PERTH; iso: BRI, CANb’ K MFI NY, PERTH). ’ ’ Diffuse, openly branched shrub to I m tall, dividing at ground level into a number of slender spreading branches; hark smooth, grey on branches, brown on branchlets; lenticels often quite prominent; hrancideis terete, very obscurely nerved, glabrous or sparsely antrorsely .strigose. Stipules narrowly’ triangular, ca. 1 mm long. Phyllodes regularly verticillate, 6-9 per whorl, linear-tetra- gonous (sometimes appearing trigonous due to reduction of midrib on upper surface of phyllode). 8-12 mm long, patent to slightly reflexed, straight or slightly curved, quite rigid, glabrous or sometimes glabrescent, stomata (lumer- OLis (quite apparent at x 10 mag.), pungent (mucrone 1 mm long, straight brown); puiviuus ca. 0-5 mm long, slightly dilated towards the baVe. Gland inconspicuous, situated on rib on upper surface of phyllode 2-4 mm above the pulvinus. orifice circular lo oblong and 0- 1-0-2 nim diam. Inflorescences simple, 1-2(3) per node; peduncles 2-4(5) mm long, glabrous, basal bract solitary; receptacle obloid, glabrous; flower heads light yellow, globular to slightly obloid, with 16-20 flowers. Bracieoles ca. I mm long, ‘puberulous abaxially. laminae ovate. Flowers 4-mcrous; caly.y J-l, length of petals divided for |-i its length into broadly triangular slightly keeled and inflexeci lobes, tube puberulous; petals ca. I -5 mm long, free "to base, glabrous, nerve- less; ovary minutely stipitate. glabrous or papillose. Legumes moniliform to 70 mm long, to 4 mm wide, firmly chartaceous. slightly curved, glabrous’ brown, stipe ca. 6 mm long; marginal nerve narrow and yellow. Seeds longi- tudinal in legume, obloid to elliptic, ca. 4 mm long, 2-5-3 rnm wide dark 100 brown, slightly shiny; pleurogram quite prominent, open towards the hilum; areole 3 mm long, I -5 mm wide; funicle slender, reflexed below a thickened, conical, white aril. Distribution: (Figure I) South-west Western Australia; known only from a restricted area along the south coast in the vicinity of West Mount Barren (about 70 km due WSW of Hopetoun). Habitat: Sand among the low shrub stratum of Eucalyptus tetragona (R.Br.) F. Muell. tall open shrubland. Western Australia: Below Mount Bland, near West Mount Barren, ESE of Ongerup, ^-‘^'bhridae and R. Coveny 3317 (PERTH); Near Point Ann, A. S. George 10044 (AD, PERTH): About I -6 km due NW of Mount Bland, Fitzgerald River National Park, B. R. Muslin 3482 (B. BRI, K, L, MEL, NSW, PERTH, RSA); I mi (I -6 km) NW of Mount Maxwell, K. Newbey 827. Flowering and fruiting period: Flowers from July to September; seeds mature in the first two weeks of December. Using Bentham’s classification (1864) A. simidans occurs in the series Brunioideae. however, it is not closely related to the other members of this group. Acacia siniulans has its closest affinities with A. argutifolia Maslin (seep. 98 above) which occurs in the Pungentes-Uninerves. These two species have the same basic phyllode and legume structure and very similar inflores- cences. Acacia simidans is distinguished from A. argutifolia by its verticillate phyllodes and its less hairy branchlets. Neither species shows a close relation- ship with previously described Western Australian acacias. In his discussion under A. cedroides Benth., Pedley (1972, p. 12) referred to a possible new species collected from near Mount Maxwell {K. Newbey 827); this species is A. simidans. As both A. cedroides and A. simulans have pungent and verticillate phyllodes they superficially resemble one another, but they are not particularly closely related. In addition to the characters mentioned by Pedley, A. simidans differs from A. cedroides in its habit (more diffuse), its normally shorter and more spreading phyllodes. its 4-merous flowers, its moniliform, firmly chartaceous, non-striate legumes, and its darker coloured seeds. Pedley (l.c.) noted that A. cedroides was not clo.sely related to the other regularly verticillate members of the Brunioideae. From my own ob.servations it appears as though this species has its closest affinities with A. laricina Meisn., a member of the Pungentes-Uninerves. Both taxa share similar phyllode. inflorescence and legume characters. The main difference between them is their phyllode arrangement (verticillate in the former taxon, scattered and crowded in the latter). An interesting comparison can be made between this pair of species and the A. simulans- A. argutifolia pair. Both A. cedroides and A. simidans have regularly verticillate phyllodes and therefore, according to Bentham’s classification, occur in the Brunioideae, but they are anomalous members of this group. Likewise, A. laricina and A. argutifolia (the respective closest relative of the above two species) are atypical members of Bentham’s Pungente.s- Uninerves; both these taxa have scattered (not verticillate) and crowded phyllodes. These two species-pairs undoubtedly constitute natural taxonomic groups. From the above it is seen that parallel evolution has occurred in these two unrelated groups of species. Thus while Bentham's classification of Acacia is undoubtedly useful for grouping species of this vast genus, it does not necessarily reflect the true relationships of the taxa contained therein. The specific epithet refers to the superficial resemblance of the new species to A. cedroides. iOl Acknowledgments The author wishes to express his appreciation of the assistance given by Mr. Ken Newbey for his valuable comments on A. argiilifolia and A siiniilans. Mr. Alex George is also gratefully acknowledged for checking the latm des- criptions. References Bentham G. (1864). Flora Australiensis, vol. 2. Reeve, London. i Maiden, .1. H. ( 1917). Notes on Acacia No. .3.— Extra-tropical Western Australia. J. Roy. Pedley, L. (1972). A Revision of Acacia lycopodifolia A. Cunn. ex Hook, and its Allies. Contr! Qd. Herb. No. 11, pp. 1-23. 102 Six new taxa of Eucalyptus from Western Australia By M. I. H. Brooker* Abstract Six new eucalypts are described — Eiica/yptiis hatladoiuensis from near Balla- doma, E. deflexa from east of Lake King, E. effusa from east of the Fraser Range, E. goniantha subsp. semighbosa from near Mt Le Grand, E. leiicophloia from the Pilbara district and eastwards to western Queensland, and E. promincns from near Exmouth Gulf. Eucalyptus balladoniensis Brooker sp.nov. (Figures I, 2). Pryor and Johnson codeSIT;Z. Frutex mallee ad 4 m altus, caulibus inferis fibrosis, superis laevibus. Lignotuherum formans. Medulla glandulifera. Folia planlulac sessilia, plerumque decussata, linearia, 1-5-6 x 0-I-0-8 cm, glauca, supra concava. Folia adulta 7-13 x 1-2-5 cm. glandulls oleosis numerosissimis. Iiifloresceiniae axillares, 7-florae. Pediinculi 1-2 cm longi, aliquot recurvi, complanati vel teretes et crassi. Alahastra ad 25 x 8 mm. Hvpaiithio hemisphaerica vel obconica aliquot costata. valde rostrata, crassa. ftY/ic-e/// 4-8 mm longi. Loculi 4. Ovula verticaliter 4-seriata. Fructus pedicellata, hemisphaerica, 10-12 x 9-12 mm. Cicatrix operculi lata, ascendens. Discus incurvus. Valvae exsertae, dorsaliter excavatae. Semina ovalia, ca. 2 x I mm, cinerea, laevia. Type: 80 km by road south of Zamhus towards Balladonia, Western Australia (31°37'S 123°53'E) 13 Feb. 1970, M. 1. H. Brooker 2471 (holo: PERTH; iso: FRI, NSW). A mallee to 4 m tall with grey to dark grey Hbrous bark on the lower trunk, smooth grey brown or pinkish grey above. Capable of forming ligno- tubers. Pith glandular. Cotyledons bi.sected, petiole 4-6 mm. arms 5-7 mm. SeedHuy leaves sessile, decussate, rarely spirally arranged, linear, I -5-6 x 0- 1-0-8 cm, bluish green, concave above. Juvenile leaves shortly petiolate, lanceolate, up to 15 x I °7 cm! Adult leaves petiolate (to 2 cm long) not opposite, lanceolate, 7-13 x 1-2-5 cm. Reticulation dense. Glands extremely numerous, seen mostly at veinlet inter- sections, variable in outline, equal to or larger than the areoles. Inflorescences axillary of 7 flowers. Peduncles 1-2 cm long, some recurved, flattened or terete and stout. Buds to 25 x 8 mm. hypanthium hemisphericai to obconical, sometimes ribbed, operculum beaked, thick. Pedicels 4-8 mm long. Stamens all fertile, flexed both tangentially and radially in bud. Anthers subglobular, basifixed, versatile, opening by lateral, oval pores. Stvle in.serted deeply into beak of operculum. Locules 4. Ovules in 4 vertical rows. Fruit pedicellate, hemispherical, 10-12 x 9-12 mm. Operculum scar broad, ascending. Disc incurved. Valves 4, exserted, hollowed at the back. Seed oval-shaped, ca. 2 x 1 mm, grey, smooth. Chaff reddish brown, cubic or subulate. Distribution: Western Australia: north and north-west of Balladonia. Other collections: 160 km east of Norseman by road towards Balladonia (32 I2'S, 123 I8'E) 5 Sepl. 1968, P. (/. Wilson llFi^ 7734 (PERTH) and 23 Aug. 1969, N. T. Rossiter (FRI); 21 km west of Balladonia by road towards Norseman (32 16'S, 123 26 'E) 26 April 1972, M. /. H. Brooker 3653 (FRI, PERTH, NSW, AH, MEL) and 10 April 1974, M. I. H Brooker 452:5 (FRI), 4536 (FRI, PERTH, K, GAIJBA). Flowering period: August-January. * CSIRO, Division of Forest Research, Banks St., Yarralumla, A.C.T. 2600 103 Figure J. Eucalyptus ballacloiiieitsis sp. nov. A — Ovules, x 11. B, C — Buds, x 1-5. D — Cotyledons, x 1. E — Seedling, x 1, F — Young buds, x 1-5. G — Anthers, x 20. H — Fruit. X 1. I — Leaves, x 1. J — Seed(s) and chaff (c), x 15. 104 Few collections of Eucalyptus balladoniensis appear to have been made away from the Eyre Highway between Norseman and Balladonia so its dis- tribution is poorly documented at present. The soil surface of the area of occurrence is sandy with some limestone rubble. Associated species are Eucalyptus plaiycorys Maiden & Blakely, /:. transcoiitinciiialis Maiden and E. conglohata subsp. /mvcr/ M. I. H. Brooker. The two latter ta,xa provide a remarkable case of convergence as the trees of both are close in bark and habit. The ground cover is sparse Triaclia sp. and Kochia sp. The natural affinities of E. hallacloniensis are not clear. It belongs in Symphyoiuyrtus and from anther and seed characters it would best be placed in the series Oleosae* perhaps nearest to E. transcouliiicnlalis from which it differs vastly, however, in habit and fruit and seedling morphology. E. trans- continentalis is a smooth, white-barked tree and seedlings of the Balladonia population are remarkable for their coarse, decurrent, ovate-lanceolate leaves. E. hallacloniensis is a rough-barked mallee whose seedlings have long, linear, non-decurrent leaves. * Infrageneric taxa after I^ryor and Johnson (1971). 105 Eucalyptus deflexa Brooker sp.nov. (Figures 3, 4). Pryor and Johnson code SUM. Frtue-y: “mallee” ad 3 m altus, caulibus laevibus, cinereis, exilibus. Lignotuberum Ibrmans Folia atliilla angusto-lanceolata, 5-7 x 0-5-0 -8 cm, uncinata, flavo-virentia, nitida. Glandulae sparsae. htflorescentiae axillares, (3) 7-florae. Pediinciili deflexi vel penduli, 1-3 cm longi, teretes. Alabasira cylindrica. 7-12 x 3-5 mm. Pedkelli ad 2 cm longi. Opercida depresso-hemis- phaerica vel roslrala, brevia. Fdamema glandiilifera, flava vel rosea. Loculi 3—5. Fnictus doliiformes, 9-12 x 6-9 mm, affix! pedicellis ad 3 cm longis. Semina elliplica vel lachrimiformia, atrocinereo-brunnea. penitus foveata. Type: 35 km east of Lake King towards Danlell, Western Australia (33''05'S, 120 02'E) 11 Nov. 1966, P. G. Wihon 5745 (holo: PERTH; iso; FRl). A small mallee to 3 m tall with smooth, grey, slender stems to 3 cm diameter. Pith glandular. Capable of forming lignotubers. Cotyledons reniform ca. 4x5 mm. Seedling leaves petiolate, decussate, lanceolate, 0-8-5 x 0-3-1 -5 cm. Adult leaves petiolate (5-10 mm long), not opposite, narrow-lanceolate, 5-10 x 0-5-1 cm, uncinate, yellowish green, glossy. Reticulation dense. Glands sparse, irregular, at veinlet intersections. Inflorescences axillary of (3) 7 buds. Peduncles deflexed or pendulous, 1-3 cm long, terete. Buds cylindrical, 7-12 x 3-5 mm, yellow, on pedicels to 2 cm long. Operculum depressed hemispherical, or rostrate, usually much shorter than the hypanthium. Stamens all fertile. Filaments glandular, in- flected radially in bud, yellow or pink. Anthers oblong, truncate, sub-basifixed, versatile, opening by longitudinal slits. Locales 3-5. Ovules in 4 vertical rows. Fruit barrel-shaped. 9-12 x 6-9 mm, on pedicels to 3 cm long, smooth or slightly ribbed towards the top. Disc broad, descending, vertical. Valves 3-5, deeply sunk. Seed elliptical or tear-shaped, dark grey-brown, deeply pitted, ca. 1 -5 x 1 mm. red-brown. Distribution: Western Australia: east and north-east of Lake King. Other collections: east of Lake King, Oct. 1961, A. Popplewell (PERTH, FRI); Rabbit Proof Fence 16 km north of Lake King-Norseman Road (32°56'S, 119 53'E) 17 June 1966, J. S. Beard (PERTH); Rabbit Proof Fence east of Lake King (33 05'S, 120 02 'E), Oct. 1966, F. H'. Rowe (PERTH, FRI); 291 mile peg on the Hyden-Norseman track, 26 Oct, 1966, A. Kes.sell 510 (PERTH); Ml Madden (33 14'S. II9 50'E) Mar. 1967, Officer-in-Charge, Departmenl of Agriculture, Lake Grace (PERTH); ca. 16 km ESE of Lake King (33 OS'S, 1 19 49'E) 30 Mar. 1967, IV. Roden (PERTH); 77 kin south of the Norseman-Lake King Road, 23 May 1968. H. Demarz 130 (PERTH); 27 km east of Lake King (33 05'S, 119 57'E) 9 ,Aug. 1968. P. G. Wilson 6965 (PERTH, ERl); 5 ktn south of Ml Gibbs, east of Lake King (32 57 'S, 119 58'E) 31 Aug. 1969, A. S. George9A55 (PERTH, FRI), 9456 (PERTH); 30 km east of Lake King (33 05'S, 1 19 58'E) 21 April 1972, M. I. H. Brooker 3595 (FRI, PERTH K, NSW, GAUBA, AD, MEL), 3596 (FRI, PERTH, AD, NSW, MEL); I2I km east of Hyden on the Norseman track (32° 21' S, 120° 07' E) 30 Oct. 1975, M.I.H. Brooker 4985 (FRI, PERTH, NSW, AD, MEL). Flowering period: April-October. Eucalyptus deflexa is a small mallee of the scrub east and north-east of Lake King. Soil surface is sandy, often with lateritic gravel. Associated species are E. eremophila (Diels) Maiden. E. flocktoniae Maiden, E. foecunda Schau. E. incrassata LabilL, E. redunca Schau. and E. pileata Blakely. Its natural affinities within Symphyomyrtus are indicated by the cotyledons (reniform), the lilament arrangement (radially inflected), the ovule row number (4) and the seed coat (dark, deeply pitted with irregular transparent margins). These characters place it in the series Torquatae. The peduncles are always deflexed (the reason for the specific name). 106 Figure 3. Eucalyptus deflexa sp. nov. A — Ovules, x 12. B — Bud section, x 5. C — Cotyledons, x 1-5. D — Anthers, x 30. E — Buds, x 1. F — Leaves, x 1. G — Seed(s) and chaff (c), X 10. H — Fruit, x 1. 107 Figure 4. Distribution of Eucalyptus deflexa sp. nov. and E. goniantha subsp. semighbosa subsp. nov. Eucalyptus effiisa Brooker sp.nov. (Figures 2, 5). Pryor and Johnson code SIK:l‘. Eiicalypto saliibri F. Muell. affinis a qua habitu inferiore et effusiore, cortice nondecorti- canti, caulitjus non-canaliculatis, et alabastris et fructibus brevioribus, differt. Type- 112 km east of Norseman by road towards Balladonia, Western Australia (32 02'S, 122°57'E) 12 Mar. 1967, G. M. Chippendale 157 (holo: FRI; iso: PERTH, NSW, MEL). A mallee to 4 m tall with flaking, non-decorticating bark on the stems, smooth grey or pinkish grey above; stems apparently non-fluted. Capable of forming lignotubers. Pith glandular. 108 Figures. Eucalyptus effiisa sp. nov. A— Ovules, x 18. B -Bud section, x 7. C, E— Buds and leaves, x 1.' D— Anthers, x 20. F— Seed(s) and chafi' (c), x 15. G- Fruit, x 1-7. H — Cotyledons, x 2. 109 Cotyledons bisected, petiole 3-4 mm, arms 5-10 mm. Scedliiif’ leaves peti- olate. decussate, lanceolate to ovate-lanceolate, 1-5 x 0-3-2 cm. green. Adult leaves petiolate. not opposite, lanceolate, 5-10 x 0-6-1 -5 cm. Reticulation moderately den.sc and finally obscure. Glands numerous, very irregular in outline, discrete. Inflorescences of 7 flowers, axillary or sometimes apparently clustered towards the ends of branchlets. Peduncles 3-10 mm long, becoming broader at the top. Buds cylindroid or double-conical, 6-9 x 3-4 mm. Pedicels I -3 mm long. Operculum acutely or obtusely conical, as long as or longer than the hypanthium. Stamens all fertile, at first erect then variously inflected with the anthers surrounding the style. Anthers oblong, sub-basifixed, versatile, opening by longitudinal slits. Locides 3 or 4. Ovules in 4 or 6 vertical rows. Fruit shortly pedicellate, cupular or obconical, 5-7 x 5-6 mm. Disc not conspicuous. Valves 3 or 4 to rim level or slightly exserted. Seed irregular, ca. 1 x I mm. yellow or brown, deeply and finely pitted on the dorsal side. Chaff cuh\c and subulate, reddish brown. Distrihution: Western Australia: between the Fraser Range and Balladonia. Other collections: Evrc Highway, 85 km WNW of Balladonia Station, Western Australia (32 04 'S. 123 03 'E) 2 Oct. 1961,',/. H. Willis (MEL. ERI); II5-1 16 km east of Norseman by road tow'ard Balladonia, Western Australia (32 02 'S, 122 58 'E) 14 Feb. 1970, A7. /. H. Brooker 2483 (PERTH) and 26 April 1972, M. /, H. Brooker 3646 (FRI, PERTH, K, NSW, AD). Flowering period: uncertain (GMC 157 flowered in March). The natural affinities of Fucalyplus effusa are clear. The cotyledons are bisected (section Bisectaria), the pith is strongly glandular, the filaments are firstly erect then variously inflected with long anthers, and the seed coat is honey-combed in a characteristic fashion (series Salubres). It is therefore a “gimlet" but appears to retain the dead bark and to lack the fluted stems. Eucalyptus effusa is a low mallee of unimpressive straggly appearance (the reason for the specific name). It often occurs in pure stands in low hilly or flat stony country sometimes with dense Triodia understorey. Its distribution is not known to overlap with that of other gimlets which occur to the south and west. Hence it may retain its fairly high degree of specific integrity compared with E. saluhris F. Muell., E. campaspe S. Moore and E. diptera Andrews which have overlapping distributions resulting in intergradation. Eucalyptus goniantha Turcz. subsp. semiglobosa Brooker subsp. nov. (Figures 4, 6). Pryor and Johnson code SIP:DB. A subspecies typica praesertim operculis globosis et generaliter pedicellis longioribus, gracilioribus el fructibus semiglobosis, differt. Type: Between Mt Le Grand and Frenchmans Peak. Western Australia (33 59 'S, 122 08 'E) 22 April 1972, M. I. H. Brooker 3613 (holo: FRI; i.so: PERTH, NSW, K, AD. MEL, BRI). An erect mallee to 3 m tall with smooth, grey bark. Branchlets quad- rangular in section. Capable of forming lignotubers. Cotyledons bisected, slender, petiole 7-10 mm, arms 8-1 1 mm. Seedling leaves sessile, decus.sate, linear. I -5-4 x O-l-l cm. Juvenile leaves petiolate, decussate, ovate, 2-4 x 1-2 cm. Adult leaves petiolate (I - 5-2 -5 cm long), not opposite, lanceolate to broad-lanceolate. 8-12 x 2-4 cm, dark green, glossy. Reticulation dense. Glands numerous, irregular, seen mainly at veinlet inter- sections. large. - equal to areoles. Inflorescences axillary of 7 or 9 buds. Peduncles erect or deflexed, 1 5- 25 mm long, stout, flattened. Buds 8-11 x 6-8 mm, hypanthium cup-shaped, operculum hemispherical, thick, narrower than hypanthium. Pedicels 3-6 mm no Figure 6. Eucalyptus goniantha subsp. semiglobosa subsp. nov. A — Buds, x 1 -2. B — Fruit, X 1-2. Eucalyptus goniantha suhip. goniantha. C — Buds, x 1-3. D, E — Fruit, X 1 -3. Ill long. Stamens all fertile. Filaments glandular, inflected radially in bud. Anthers oblong, dorsifixed, versatile, opening by longitudinal slits. Locales 4 or 5. Ovules in 4 vertical rows. Fruit pedicellate, hemispherical to subglobular, 7-12 x 11-15 mm, ribbed or wrinkled. Operculum scar broad. Disc descending, vertical. Valves 4 or 5, coherent with the unshed style in young fruit, finally at rim level. Sm/ elliptical, ca 2 x 1 mm, grey, with shallow reticulation. Chaff yellow- ish brown, cubic or subulate. Distribution: Western Australia: between Mt Le Grand and Frenchmans Peak, south-east of Esperance. Other collections: same localilv as tvpe, 22 April 1972, M. /. H. Brooker 3614 (FRI), 3615 (FRl. PERTH, NSW. AD, MEL). Flowering period: April. Eucalyptus gouiantha subsp. semiglohosa is a mallee shrub known only from the sides of a creek in granitic hills between Mt Le Grand and Frenchmans Peak. Its erect habit may be brought about by the extremely dense shrubbery among which it grows. Associated species are E. aquiUna Brooker and E. ligulata Brooker. It is obviously close to E. goniantha from which it differs consistently in the rounded opercula (the reason for the subspecilic name) and consequently less deeply buried style tip. and more generally in the longer, more slender pedicels, and subglobular fruit. The form is imperfectly known and sampled and it is not to be unexpected that more intergradation with subsp. goniantha than has been seen to date will be found. Eucalyptus leucophloia Brooker sp. nov. (Figures 7, 8). Pryor and Johnson codeSNACIB. Arbor parva vel trutex "mailee” pagina corticis alba, pulverulenla. Lignoliiheriim formans. Medulla glanduiifera. Cotyledones renirorme.s. 3x5 mm. Folia planuilac decussata, giaiica, primiim sub- sessilia, angiislo-lanceolata vel ovaia, demum peliolata, ovata vel orbicularia ad 7x6 cm. Folia uduha peliolaia, non-oppo,sita, lanceolata vel angusto-lanceolala, 5-10 x 1 2 cm, glauca vel flavo-viridia. Infioresceiiliac plcrunique axillares. 7-vel 1 1 -Horae, glaucae. Alahastra breviler pedi- cellata, ovoidea vel duplicato-conica. Stamina omnia fertilia. Antherae oblongae, dorsi- fixae, versatiles ab rimis longitudinalibus non-confluenlibus dehiscentes. Ovarium inferum vel semi-inferum. Loculi 3. Ovtda verticaliler 4, 5, vel 6 seriala. Fructus breviler pediceliali, hemisphaerici vel cupulali. Discus angustus. Vaivae plerumque valde exsertac. Semina ca. 1-5x1 mm, Havo-brunnea, reticiilo nonprofundo. Type: Western Australia, near Rtidall River (22 37'S, 122 12'E) 22 Ma\ 1971, A S George 10782 (holo: PERTH; iso: FRI. K, NSW). A small tree or mallee with white powder bark over the trunk and limbs. Bark often characteristically black-spotted. Capable of forming lignotubers. Pith glandular. Cotyledons reniform, 3x5 mm. Seedling leaves decussate, glaucous, at first sLibsessile. lanceolate to ovate; later, petiolate. ovate to orbicular, to 7 x 6 cm. Adult leaves petiolate, not opposite, lanceolate to narrow-lanceolate, 5-10 X 1-2 cm, glaucous or yellowish green. Reticulation dense. Glands few at veinlet intersections. Inflorescences 7 or 1 1 flowered, axillary, sometimes clustered towards the ends of branchlets; more or less glaucous. Peduncles 4-10 mm long. Buds shortly pedicellate, ovoid to double conical 5-9 x 3-5 mm. Operculum hemi- spherical, conical to slightly rostrate, shorter than or equal to the hypanthium. 112 r 1 1 17^12 Figure 7 Euculyptus leucophloia sp. nov. A — Ovules, x 30. B Bud section, x 5. C Cotyledons, x 3. D— Buds, x 1. E— Leaves, x 1. F— Anthers, x 20. G— Seed(s) and chaff fc), X 25. H— Fruit, x 2. 113 Figure 8. Distribulion of Eucalyptus leiicophloia sp. nov. and E. prominens sp. nov. Stamens all fertile. Filaments variously inflected. Anthers oblong, dorsifixed, versatile, opening by longitudinal slits. Ovary inferior or semi-inferior. Locales 3. Ovules in 4, 5 or 6 vertical rows. Fruit shortly pedicellate, hemispherical or cupular, 5-8 x 4-6 mm. Disc narrow. Valves 3, usually strongly exserted and deltoid. 5'm/ irregular in outline, flattish, ca. 1-5x1 mm, yellowish brown with a shallow reticulum on the dorsal side. Distribution: From the Pilbara district of Western Australia eastwards across the continent to western Queensland. Other collections: numerous collections in Western Australia between latitudes 20° and 23°; and in the Northern Territory and western Queensland between latitudes 16° and 21 °. Flowering period: June-November. Eucalyptus leucophloia has been confused with E. brevifolia F. Muell. for many years. E. brevifolia has a much more restricted distribution than E. 114 leucophloia (Hall and Brooker 1974) and is confined to the Kimberley district of Western Australia and the north-west of the Northern Territory. Blake (1953) included both taxa in E. hrevijoHu and commented that specimens from the neighbourhood of the Victoria River, the type locality, had fruit with “a relatively broad disc and short valves”, and that the fruit of “Blake 17360 (near Powell Creek) at the other extreme — with a relatively much thinner, more or less descending disc and larger valves”. These .specimens are E. hrevifolia and E. leucophloia respectively. Blake (loc. cit.) commented on the confusion between E. hrevifolia and £. microtheca on fruit characters. This would apply particularly to £. leuco- phloia, as both it and £. microtheca have obscure discs and partly superior ovaries resulting in strongly exserted deltoid valves, but the two are readily separable on anther characters — £. microtheca being distinctly a box and £. leucophloia (and £. hrevifolia) belonging to the series Albac. The specific name is given for the strikingly white bark which is often characteristically black spotted. £. leucophloia is known as “Migum" in the Pilbara district of Western Australia where it is very common and associated with £. terminalis F. Mueil., £. gamophylla F. Muell. and £. trivalvis Blakely. The seedling leaves of the Pilbara forms tend to be orbicular, often broader than long while those to the east tend to have ovate seedling leaves. Eucalyptus prominens Brooker sp. nov. (Figures 8, 9). Pryor and Johnson code SII :G. Fiiitex "mallee'' vel arbor parva ad 3 m alta. Cortex interdum librosa basin versus vel omnino laevis. Uirnotiibeniin formans. Fotia ntaiuulae sessilia. deeussala. lanceolata, 1-6 x 0-,5-l -5 cm. Fotfu udiilui angusto- lanceolata vel lanceolata, 6-13 x 0-7-2 cm, nitida. Iiifloresceiitiae axillares, V-tlorae. Peclunciili 4-\5 mm longi, plerumque crassi. Atahastra clavata, 8-1 3x5-10 mm, fere sessilia vel pedicellis ad 4 mm longis. Ftypanlhiuiti obconiciim. Operculum hemisphaericum plerumque quam hypanthium brevius. Loculi 4 vel 5. Fructus obconici, 6-12 x 8-13 mm. Valvae leviter ex,serlae. Semina e\\\p\\cd, alrocinerea, ca. 1-5x1 mm. Type: Shothole Canyon. Cape Range, Western Australia (22 04'S, 114 01 'E) 6 Sept. 1970, K. M. Allan 462 (hole: PERTH; iso: FRI. NSW, AS, K, AD). A mallee or small tree to 3 m tall. Bark sometimes fibrous and grey at base to 0-5 m, or wholly smooth and grey to greenish brown, Bith glandular. Capable of forming lignotuhers. Cotyledons bisected, petiole ca. 6 mm. arms ca. 8 mm long. Seedling leaves sessile, decussate, lanceolate, 1-6 x 0-5-1 -5 cm. Adult leaves petiolate (5-20 mm long, flattened), not opposite, narrow-lanceolate to lanceolate, 6-13 x 0-7-2 cm. shining. Reticulation moderately dense though finally obscure. Glands numerous, large, very irregular, green or clear. Inflorescences axillary of 7 buds. Peduncles 4-15 mm long, usually stout and flattened or terete and angular. Buds clavate. 8-13 x 5-10 mm, almost .sessile or pedicels to 4 mm long. Hypanthium obconical. Operculum hemi- spherical usually shorter than the hypanthium. Stamens all fertile. Eilaments irregularly inflected. Anthers surrounding the style and domed roof of ovary, oblong, sub-basifixed, versatile, opening by longitudinal slits. Locules 4 or 5. Ovules in 4 or 6 vertical rows. Emit obconical. 6-12 x 8-13 mm. Disc incurved. Valves 4 or 5 slightly exserted. Seer/ elliptical, ca. 1-5x1 mm, dark grey, shallowly pitted. Distribution: Western Australia: Cape Range and west of Scrubby Range. 115 Figure 9. Eucalyptus prominens sp. nov. A — Ovules, x 13. B — Bud section, x 5. C — Anthers, X 20. D— Buds, x 1. E— Leaves, x i. F— Seed(s) and chaflf (c), x 13. G— Fruit, X 1 -5. 116 Other collections: 16 km west of Learmonth, south of Exmouth (22°14'S, 113 56 'E) 5 Sept. 1970, K. M. Allan 439 (PERTH, FRI, NSW, MEL, BRI); Shothole Canyon, Cape Range, south of Exmouth (22 04 S, 113 56 'E) 7 Sept. 1970, K. M. Allan 465 (PERTH, FRI, NSW, GAUBA, DAR); Shothole Canyon, Cape Range (22 04'S, 1 14 Ol'E) 7 Sept. 1970, A. S. George 10321 (PERTH, FRI, AD, MEL), 25 April 1974, M. I. H. Brooker 4577, 4578, 4579 (FRI, PERTH. NSW, AS, GAUBA); Exmouth road, 22 km north of Waroora turnofl’(23 I8'S, 1 13"5I E) 8 Sept. 1970, A. S. George 103.52 (PERTH, FRI, NSW, AD, GAUBA. AS, DAR); near Mt Hollister, Cape Range (22 08'S, 114 01 E) 24 April 1974, M. I. H. Brooker 4575 (FRI, PERTH, NSW, AS, AD); ca. 5 km west of Giralia homestead (22 01 S, 114 21 E) 24 April 1974, M. I. H. Brooker 4569 (FRI, PERTH, NSW, AD, AS). Flowering period: September-October. Eucalyptus prominens occurs mainly in the Cape Range, west of Exmouth Gulf where it grows on limestone hills and in valleys. Associated species are E. oleosa F. Muell. ex Miq. and E. lerminalis F. Muell. South of the Gulf it grows on sandy plains and low sandhills where Triodia sp. forms a dense ground cover. E. prominens is related to E. irivalvis and differs in the 4-5 locular ovary, the obconical fruit with much more prominent valves (the reason for the specific name) and seedlings whose leaves are almost sessile. The buds are usually bigger than those of E. irivalvis with opercula more rounded and much shorter than the hypanthium. Acknowledgments 1 wish to thank Mr. A. S. George, Dr. A. S. Weston and Mr. K. M. Allan for bringing to my attention E. prominens, E. dejlexa and E. goniantha subsp. semiglobosa; to Mr. A. S. George, Mr. C. Bell and Mrs. M. J. Brennan for checking the final drafts; Mr. G. Moss for the illustrations and Mrs. M. May for the maps. References Blake, S. T. (1953). Studies on northern Australian species of Eucalvptus. Aust.J.Bot. 1, 185-352. Hall, N. and Brooker, M. 1. H. (1974). Forestry and Timber Bureau, Forest Tree Series Leaflet No. 164. (AG PS, Canberra), Pryor, L, D. and Johnson, L, A. S. (1971). "A Classification of the Eucalypts" (Aust. Nat. Univ., Canberra). 1 17 ( 2>— 5281 6 A taxonomic revision of the genus Chamaexeros Benth. (Xanthorrhoeaceae) By R. H. Kiichel* Abstract An account is given of the genus Chumaexeivs Benth. and of the three species recognized. One new species — C. macvantherci is described from the South-West region of Western Australia, where the genus is endemic. Introduction An examination of plant specimens collected in the South-West region of Western Australia during September 1964, revealed the presence of a hitherto undescribed species of Chamaexeros. The fact that this new species had, in the past, been confused with C. fimbriata (F. Muell.) Benth. was demonstrated by an examination of herbarium specimens of this genus obtained on loan from PERTH, MEL and NSW. Plant taxonomists in general agree that the genera Chamaexeros Benth., Acanthocarpus Lehm. and Lomandra Labill. belong to a closely related group. This was substantiated by Fahn (1954) in his study of the anatomy of the Xanthorrhoeaceae. He referred in this paper to "the Lomandra group" con- sisting of Lomandra, Acanthocarpus and Chamaexeros. F. von Mueller (1889) grouped these three genera under the illegitimate generic name of Xerotes R. Br. Ewart (1916) was unable to find any satisfactory characters by which to distinguish Acanthocarpus from Chamaexeros and com- bined them under the older name Acanthocarpus Lehm. This procedure was also followed by Gardner (1930). Bentham (1878) had, however, formulated a key which can be used to distinguish between the three genera and his treatment, with minor amendments, is followed in the key below. Blackall (1954) also followed Bentham. Key to the Genera of “the Lomandra Group” 1. Flowers dioecious; styles .short with i recurved lobes; filaments much shorter than tepals I.omandra 1. Flowers bisexual; style subulale, simple; filaments almost as long as tepals 2. Capsule smooth; leaves in basal tufts, bordered when young by a scarious lacerated margin, to 4.t cm long ... .. .. .... .... ... Chamaexeros 2. Capsule niuricale; leaves distributed along branched aerial stems, without a scarious margin, to 4 cm long Acanthocarpus CHAMAEXEROS Chamaexeros Benth,, FI.Austral.7:l 10( 1878). Tufted perennials (resembling many Lomandra spp.). Leaves radical, rigid, the young ones bordered by a scarious lacerated margin. Inflorescence a panicle or an umbel-like cluster. Flowers bisexual. Perianth .segments 6, free, subeqttal, pale yellow, the outer 3 broader and more rigid than the inner. Stamens 6, the inner 3 attached to the base of the perianth, the outer 3 hypo- gynous, equal in length, slightly shorter than the perianth; anthers dorsi-fixed, versatile, introrse. Ovary 3-celled, with I ovule in each cell. Capsule (only known from one specimen) loculicidal, globular, smooth; seeds globular. * Botanic Garden. North Terrace, Adelaide, South Australia 5000. 118 Lectotype species: C. xerra (Endl.) Benth. Origin of name: From the Greek chamai, on the ground; xeros, dry. Probably refers to its size and texture, perhaps chosen to contrast with Xerotes under which it had been previously placed. Distribution: Western Australia: South-West region. Key to Species I. Leaves terete; style swollen at base and tapering into the ovary; flowers in a pyramidal panicle I. C. limbriata 1. Leaves flat; style fllil'orm to the base; ovary obtuse to truncate at the summit 2. Flowers clustered in an umbel-like head at the end of a short bracteate scape 2. C. serra 2. Flowers in a pyramidal panicle, scape lacking sterile bracts 3. C. macranthera 1. Chamaexeros limbriata (F. Muell.) Benth., FI. Austral.7:l 1 1(1878). Xerotes fimhriata F. Muell., Fragm, 8:21 1(1874); Sec. Syst.Census200( 1889). — Type: In Aus- tralia occidentale extratropica, J. Dninunond 329 (holo: MEL 8384). Acaiilhncarpiis fim- briatus (F.Muell.)Ewart, Proc.Roy.Soc.Vic.28 :200( 1916); Gardner, Enum. PI. Austral. Occ.20 (1930). A tufted perennial. Leaves distichously sheathing at the base of a short stem, terete to slightly Battened distally, erect, often curved, rigid, to 45 cm long and 2 mm diam. bordered when young by a narrow scarious lacerated margin which disappears with age. Scape axillary, bearing a loose pyramidal panicle to 30 cm long; lacking sterile bracts below first panicle branches; single small bract at ba.se of branches; two small bracteoles at base of each filiform pedicel; primary panicle branches in whorls of 3-6. Pedicels to I - 5 cm long, in whorled clusters of 4-8, terminal or at nodes on panicle branches. Perianth segments oblong, obtuse, to 3 mm long. Anthers to 0-3 mm when dry. Style Figure 1. Distribution of Chamaexeros fimhriata (F. Muell.) Benth, 1 19 about I -5 mm long, swollen at base and tapering into the ovary. Capsule smooth, to 6 mm long, 3-locular, splitting loculicidally, tepals persistent. Seed globular, to 3 mm, surface wrinkled when dry. Distribution: Western Australia; South-West region (Fig. I). Without locality, J. Drummom! 329 (MEL), s.n.lMEL 8385 & 8386); Cunderdin, Aug. 1903, W. V. Fitzgerald (NSW 74268, PERTH); Bullabulling, Sept, 1934, C. A. Gardner (PERTH); Dalwallinu, Sept. 1947, Rovce 2118 (PERTH); between Booraan & Burracoppin, Aug. 1949, r. Salisbury (PERTH); 437 km from Perth, Great Eastern Highway, Sept. 1966, E. M. Scrymgeour 751 (PERTH); Yorkrakine Rock near Westonia, July 1970, J. S. Beard 5962 (PERTH); 21 km N of Kellerberrin, Aug. 1970, M. /. H. Brooker 2690 (PERTH); west of Red Kangaroo Hill, Nov. 1891, R. Heims (MEL 8378, AD 97012342); 200 km E of Kal- goorlic (camp 59), Sept. 1891, R. Helms (MEL 8379, AD 95936087); 535 km from Perth on Great Eastern Highway, July 1967, A. M. Ashby 2138 (AD); 80 km W of Daniell, Sept. t964, P. Wilson 3189 (AD); Cowcowing, Aug. 1904, M. Koch (MEL 8383); Upper Swan, 1888, E. Mm'n//(MEL 8382); Kellerberrin, Dec. 1903, F. H. KocAo// (NSW 74269). 2. Chamaexeros serra (Endl.)Benth., Fl.Austral.7:l 10 (1878). Xerutes serra Endl. in Lehm., PI.Preiss.2:49( 1846); Walp., Ann.Bot.Syst. I ;88I( 1848); F. Muell., Sec.Syst.Census200 (1889). — Type: In solo sublimoso-glareoso districtus York et Hay, 25 Apr. et 8 Nov., Preiss 1539 (MEL; specimen on left, lecto; specimen on right, .syn.). Acan- thocarpns serra (Endl.)Ewart, Proc.Roy.Soc.Vic.28;220(1916); Gardner, Enum. PI. Austral. Occ.20 (1930). A tufted perennial. Leaves distichously sheathing at the base of a short stem, flattened, rigid, often falcate, to 30 cm long and 4 mm broad, bordered when young by a narrow scarious lacerated margin which disappears with age. Scape axillary, to 10 cm long, bearing a terminal umbel-like cluster of flowers and bearing sterile bracts with scarious margins along its length; scarious bracteoles conspicuous at base of pedicels. Pedicels to 15 mm long, in clusters of up to 12, Perianth segments oblong, obtuse to 5 mm long. Filaments slightly flattened, pale orange in colour; anthers to 0-5 mm long. Style about 3 mm Distribution of Chamaerxeros serra (Endl.) Benth. 120 Figure 2. long, filiform to the base: ovary obtuse to truncate at the summit. Fruit not known. Distribution: Western Australia: South-West region (Fig. 2). Mt. Barker, Oct. 1900, Goacibv B. 2059 (PERTH); Stirling Range, Oct. 1901, Diels & PritzeUif, (PERTH); valley N of Stirling Range. Oct. 1903, C. Andrews (PERTH); 24 km W of Pingrup, Sept. 1961, R, D. Rovce 6689 (PERTH); near Woogenilup, Oct. 1962, T. E. H. Aplin 2115 (PERTH); 62 km W of Raven.sthorpe, Oct. 1966, P. C. Wilson 5411 (PERTH); Narrogin, 165 km SE of Perth, Aug. 1926,7. B. C/t-W (AO 97204166); Tammin, 80 km E of Northam, Aug. 1926, E. H. Ising (AO 95940013); 25 km E of Cranbrook, Sept. 1964, R. H. Kiicitel 1919 (AO); districts of York and Hay, April & Nov. 1840. Preiss 1539 (MEL); Stirling Range, Oct. 1867, /■'. von Mueller (MEL 8421); Chester Pass, Stirling Range, Oct. 1964, J. Galbraith 920 (MEL); Stirling Range, Sept. 1901. E. Pritzet 699 (NSW); Welshpool-Kala- munda. Nov. 1909, J. H. Maiden (NSW 74270); 32 km ENE of Pingelly, Sept. 1966, B. G. Briggs 178 (NSW); near Gnowangerup, Oct. 1972, K. I. Beemish (NSW 127665). 3. Chamaexeros macranthera Kuchel sp.nov. (Fig. 3). Herha perennis caespitosa. Folia disticha plana rigidaque, juveniles marginibus scariosis et laceratis. Scapus filiformis, cum panicula pyramidata usque ad 30 cm longa. PedieeUi in verticillos trium vel quattuor dispositi, terminales vel in modis in ranis panicularum. Tepala usque ad 4-5 mm long. Filamenia paulo planata. Antherae ovatae, versatiles, dorsifixae, in sicco usque ad 0-7 mm longae, Stylis ca, 2-5 mm longus, ad basin filiformis. Ovarium truncatum. Type: 25 km west of Coolgardie, 23, IX. 1964. R. H. Kuehel 2154 (holo; AO), A tufted perennial. Leaves distichously sheathing at the base of a short stem, flattened, erect, rigid, sometimes falcate, to 30 cm long and 3 mm broad, bordered when young by a narrow scarious lacerated margin which disappears with age. Scape filiform, axillary, bearing a loose pyramidal panicle to 30 cm long, lacking sterile bracts below first panicle branches; single small bract at base of peduncle branches; two small bracteoles at base of the filiform pedicel; primary panicle branches in whorls of 2-4, filiform, slightly erect, distant on rachis. Pedicels to I cm long, in whorled clusters of 2-4, terminal or at nodes on the panicle branches. Perianth segments oblong, obtuse, to 4-5 cm long. Filaments slightly flattened and pale orange in colour; anthers ovate, to 0 - 7 mm long when dry. Style about 2 -55 mm long, filiform to the base; ovary obtuse to truncate at the summit. Fruit not known. Distribution: Western Australia; South-West region (Fig. 4). Gibraltar, near Bullabulling, Aug. 1961, A. S. George 2691 (PERTH); Bullabulling, W of Coolgardie, Sept. 1934, C. A. Gardner (PERTH); road to Beverley. 100 km E of Perth, Aug. 1938, IT. C. (PERTH); Wubin, Aug. 1963,./. 5. Bea/r/ 2623 (PERTH); 13'5kmSof Paynes Find on Great Northern Highway, Oct. 1973, /. B. Armitage 424 (PERTH); 25 km W of Coolgardie, .Sept. 1964, R H. Kuchell\54 (AO); 3 km SE of Pemberton, Oct. 1967, R. & R. Beleher 214 (MEL, AO). Discussion The new species, Chamaexeros macranthera has, in the past, been confused with C. fimhriata. The inflorescence is a panicle in both species, but a trans- verse section of a leaf of the former species is round and in the latter is definitely flattened, being three times as broad as it is thick. There are also floral diPferences. the most obvious being that the anthers of the new species are larger than C. fimhriata. Apart from the vegetative and floral characters which can be used to separate this species from C. fimhriata, with which it has previously been con- fused, it is possible to separate them on anatomical characters of their leaves. A transverse section of a leaf, taken about half-way along its length, shows the following distinguishing features. 121 AO 21 '-) ' «y8xStact»«> CflJ)*«t»i»‘* H» *154 !>a** Chamaexeros nmcranthera sp. nov. Holotype. 122 Figure 3. " ^ ti Figure 4. Distribution of Chamaexeros macranthera sp. nov. C. fiinhriata:—LQa\ cylindrical. Pallisade ine,sophyll forming a complete ring below the epidermis. Vascular bundles found at the junction of the rn^esophyll and parenchyma as well as being embedded in the strong scleren- chyma girders which run from the upper to the lower surface of the leaf. C. itiaci an f hero : ~L.c'df flat. Pallisade mesophyll interrupted by the sclerenchyma girders which run from the upper to the lower surfaces. Vascular bundles found in the sclerenchyma girders. C. .rcrra.— Similar to C. macranthera. Acknowledgments The author wishes to thank Dr. .1. P. Jessop. Chief Botanist, State Her- bal lum of South Austialia, for his invaluable advice and help in preparing the manuscript. He is also greatly indebted to the Western Australian Herbarium the National Herbarium of Victoria and the National Herbarium of New South Wales for the loan of plant specimens used in the course of this study. References BfcNTHAM, G. (1878). Flora Australiensis, vol. 7 (L. Reeve & Co., London) Blackall, W, E. (1954). How to know Western Australian Wiidflowers, pt 1 (edited bv B. J. Grieve) (University of Western Australia Press, Nedlands) Ewart, A. J. (1916). Contributions to (he Flora of Australia No. 23. Proc.Roy.Soc.Vic. n.s. 28’.2\ft-22l . ' ’ *’ Faun (1954)^^ The^ anatomical structure of the Xanthorrhoeaceae Dumort. .lourn.Linn. ^’'^‘''prin'ter'^'p'tthr^^*^* ’’'“"'“''um Australiae Occidenlalis, pt. I (Government Muellkr, F. VON (1889). Second systematic Census of Australian Plants, pt I (McCarron Bird & Co., Melbourne). Publication date of Volume 2 Number 1 The publication date of Volume 2 Number I was 27 June 1975. 52816 / 12 / 75—1 111 WILLIAM C. BROWN, Oovernmenf Printer, Western Australia Notes for authors Nuytsia publishes papers relating to the flora of Western Australia. All papers are refereed outside the Western Australian Herbarium. The Herbarium reserves the right to reject papers. Manuscripts must be submitted in duplicate. They should be typewritten, double spaced, with 2-5 cm margins and no underlining. Pages should be numbered. The desired position of text figures may be pencilled in the margin. An abstract should be provided. For style and layout, recent numbers of Nuytsia should be followed. Galley proofs will be forwarded to authors for checking. Reprints may be ordered at the author’s expense. CONTENTS Page Two new species of Acacia from Western Australia. By Mary D. Undale and B. R. Masiin 86 PtUotns gardneri Beni. sp.noT. (Amaranthaceae). By 6. Beni 93 Studies in the genus Acacia (Mimosaceae) — 5. Miscellaneous new phyllodin- ous species. By B. R. Masiin 96 Six new taxa of Eucalyptus from Western Australia. By M. I. H. Brooker 103 A taxonomic revision of the genus Chamaexeros Benth. (Xanthorrhoeaceae) By R. H. Kuchel 118 Publication date of Voiume 2 Number 1 123