ISSN 0968-0446 Bulletin of The Natural History Museum THE ATOR: : | HISTORY MUSEUM 23 AUG 2002 PRESENTED Botany Series “= S)2 NATURAL HISTORY MUSEUM VOLUME 32 NUMBER 1 27 JUNE 2002 The Bulletin of The Natural History Museum (formerly: Bulletin of the British Museum (Natural History) ), instituted in 1949, is issued in four scientific series, Botany, Entomology, Geology (incorporating Mineralogy) and Zoology. The Botany Series is edited in the Museum’s Department of Botany Keeper of Botany: Prof. R. Bateman Editor of Bulletin: Ms S.A. Henderson Papers in the Bulletin are primarily the results of research carried out on the unique and ever-growing collections of the Museum, both by the scientific staff and by specialists from elsewhere who make use of the Museum’s resources. Many of the papers are works of reference that will remain indispensable for years to come. All papers submitted for publication are subjected to external peer review before acceptance. 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Copyright © The Natural History Museum, 2002 ELECTRONIC ACCESS _ This journal is included in the Cambridge Journals Online service which can be found at: http://journals.cambridge.org For further information on other Press titles access http://uk.cambridge.org or http://us.cambridge.org World list abbreviation: Bull. nat. Hist. Mus. Lond. (Bot.) ISSN 0968-0446 The Natural History Museum Botany Series Cromwell Road Vol. 32, No. 1, pp. 1-59 London SW7 SBD Issued 27 June 2002 Typeset by Ann Buchan (Typesetters), Middlesex Printed in Great Britain by Henry Ling Ltd, at the Dorset Press, Dorchester, Dorset AX CBG LEYS) 2 Bull. nat. Hist. Mus. Lond. (Bot.) 32(1): 1—5 Issued 27 June 2002 Taxonomic notes on some African species i the family Calymperaceae (Musci) Ditiinsitien te a THE NATURAL HISTORY MUSEU! H 90n 25AGE2802 PRESENTED GENERAL UBRAR i a LEN T. ELLIS Department of Botany, The Natural History Museum, Cromwell Road, London SW7 5BD SYNOPSIS. Syrrhopodon usambaricus Broth. ex S. Orban is placed in synonymy with Syrrhopodon asper Mitt., and Syrrhopodon lisowskii S. Orban in synonymy with Syrrhopodon gardneri (Hook.) Schwagr. The distinctive features of Syrrhopodon stuhlmannii Broth. are discussed, and the only records of Calymperes moluccense Schwagr. from Africa are redetermined as Calymperes palisotii Schwagr. The research for this paper was largely undertaken in response to difficulties encountered in identifying the specimens of Syrrhopodon collected during the British Bryological Society Expedition to Mulanje Mountain, Malawi, 1991. Determination of this material would have been considerably more difficult without the important primary accounts of the African species of Syrrhopodon by Orban (1981) and Orban & Reese (1986). Syrrhopodon asper Mitt. in J. Linn. Soc. Bot. 7: 151: 1863. Type: Tanzania, Kilimanjaro, Hannington s.n. (NY!-holotype, BM!- isotype). Fis. 4. Syrrhopodon usambaricus Broth. ex S. Orban in Acta Bot. Hung. 24: 113 (1978), syn. nov. Type: Tanzania, Usambara, Lutindi, 1902, Liebusch s.n. (H-BR!-holotype). DISCUSSION. The leaves in Syrrhopodon asper Mitt. consist of a linear-lanceolate chlorophyllose limb extending from a subelliptical hyaline base. They possess a prominent marginal rib and are spinulose to various degrees. As in many species of Calymperes and Syrrhopodon, the leaves in different specimens can vary widely in their relative dimensions (Fig. la—c), and range from a stubby 4 mm to aslender 7.5 mm long. The marginal ribs, viewed in cross-section, are well differentiated. Commonly, a superficial layer of chlorophyllose cells encloses small dorsal and ventral groups of stereids that are separated by a median row of guide cells (a costa- like arrangement of tissues). This arrangement of cells in the marginal rib is plainly developed in the leaves of some specimens and less well developed in others (Fig. le—h). Towards the base in all leaves, the marginal rib becomes a flattened, undifferentiated, often unistratose band of linear cells. The region in the leaf base in which the margin transforms from a differentiated rib to an undifferentiated band also varies between specimens. The type specimen of Syrrhopodon usambaricus Broth. ex S. Orban (Liebusch s.n., H-BR) represents a form of S. asper Mitt. with tall, slender shoots. The leaves are relatively fine and nar- row, and hardly curl when dry. The marginal ribs are well differentiated, and in the leaf base, the transition from polystratose rib to undifferentiated band occurs well below the apex of the hyaline lamina (Fig. li). In the isotype material of S. asper (Hannington s.n., BM) the shoots are small and have shorter, stubbier leaves. These curl when dry, are notably spinulose, and have prominent, well-differentiated marginal ribs. The region along the leaf at which the margin transforms from differentiated polystratose rib to unistratose/bistratose band tends to be adjacent to the apex of the hyaline lamina (Fig Ik). © The Natural History Museum, 2002 Intermediate expressions of these contrasting features of Hannington s.n. and Liebusch s.n. are apparent in the great range of material now available for examination, and indicate that these superficially distinct type specimens represent extreme forms of the same species. For example, Wood 1726 (Tanzania, BM, BM-K) has leaves proportioned like those of the type of Syrrhopodon asper that become curled when dry, but some cross-sections through the distal hyaline leaf base show a degree of differentiation closer to that in the type of S. usambaricus (Fig. 1)). SPECIMENS EXAMINED. Malawi. Mulanje Mountain, June 1991: Hodgetts 2041a, 2047c, 2220b, 2532a, 2669a (RNG!); Kathumba MS5915a (RNG!), M5916 (BM!); Kungu M3123a (RNG!); Longton M8054a, M8058a, 8425b (RNG!); Magombo M4041b, 4042b (RNG!); Porley 35a, 278a (RNG!); Russell M6055b, M6063a, M6068a (RNG!); Wigginton M1034a, M1682a (RNG!), M1201a (BM!). Uganda. Kadese, Ruwenzori Mts, above Miniba camp, 2700 m, 22 January 1962, Loveridge JPL397 (BM!). Kenya. Mutha Hill, August 1938, Boy Joana 7519 (BM!, BM-K!). Tanzania. Usambara, Lutindi, 1911, Liebusch s.n. (H-BR!); Usambara Ouset, créte Matundsi-Mashindei, SE of Ambangudu Tea Estate, 1300 m, 5 February 1985, Pécs 8533/R (BM!); Kilimanjaro: above Marangu, 2000 m, 13 July 1948, Hedberg 1144e (BM-K!); on path between Marangu and Bismark Hut, 2400 m, 24 February 1953, Wood 1726 (BM!, BM-K!). Morogoro District: Nguru Mts, ridge behind Dikurura Valley, 1700-1900 m, 6°02'S 37°32'E, Pécs 89119/W (BM!); Nguru ya Ndege Hill NNW of Morogoro town, summit, 1200-1350 m, 6° 42’S 37° 36’E, Pocs & Knox 88252/H (BM!). Mozambique. Namiuli, Makua Country, 1887, Last s.n. (BM-K!). Syrrhopodon stuhlmannii Broth. Bot. Jahrb. Syst. 24: 240 (1897). Type. Tanzania, Uluguru, Bergwald, 1600 m, Stuhlmann 8809 (BM!-isotype). Fig. 2a—d. DISCUSSION. In Orban & Reese (1986) Syrrhopodon usambaricus Broth. ex S. Orban [=Syrrhopodon asper Mitt.] is keyed out beside S. stuhlmannii Broth. Large specimens of S. asper are superficially similar to those of S. stuhlmannii. Both species possess leaves with marginal ribs that have a costa-like structure (viewed in cross- section). However, the species are easily distinguished. In leaves of S. stuhlmannii the marginal ribs are mostly smooth; the cells of the chlorophyllose lamina are ventrally roundly protuberant, and dorsally flat to barely protuberant (Fig. 2a—d). The rib at the margin of the distal hyaline lamina is very well developed and strongly differenti- ated, with a median row of guide cells often more than nine cells wide (Fig. 2c, d). In contrast, most superficial cells of the marginal 2 L.T. ELLIS Fig. 1 a—l. Syrrhopodon asper Mitt. a—c: leaves; d-I: cross-sections of leaf through (d: chlorophyllose lamina, e—h: margin of chlorophyllose lamina, i-l: margin around distal hyaline lamina. a Drawn from Pécs 8533R (BM). b Drawn from Pécs & Knox 88252/H (BM), c Drawn from Boy Joana 7519 (BM). d, g, i, Drawn from Liebusch s.n. (H-BR, holotype of Syrrhopodon usambaricus). e, ; Drawn from Wood 1726 (BM). f, k Drawn from Hannington s.n. (BM, isotype of Syrrhopodon asper). h, 1 Drawn from Pécs 89119/W (BM). TAXONOMIC NOTES ON CALYMPERACEAE sae OR a a-d, 1, J Ra vedelelenan J ) 50 um 0.5 mm Fig. 2 a—d. Syrrhopodon stuhlmannii Broth. a—d: cross-sections through leaf margins (a, b: in chlorophyllose limb, c, d: in distal hyaline base). e, f: Syrrhopodon gardneri (Hook.) Schwagr. e, f: gemmae on leaves (e: in cluster at apex (ventral surface), f: in groups in mid-leaf). g—j. Calymperes palisotii Schwagr. g, h: apices of gemmiferous leaves (g: in ventral view showing gemmae-producing region (gemmae lost), h: in dorsal view); 1, j: cross- sections of chlorophyllose limb (i: showing half of costa, and j: lamina). a, c Drawn from Pécs & Knox 89053/AK (BM). b, d Drawn from Stuhlmann 8809 (BM, isotype of Syrrhopodon stuhlmannii). e Drawn from Kathumba M5073b (RNG). f Drawn from Longton M8375a (RNG). g, h, i, } Drawn from Lisowski 50255 (EGR). ribs and the cells of the chlorophyllose lamina in S. asper are replete with acute projections (Fig 1d—l). If apparent at all, the median row of guide cells in the rib at the margin of the distal hyaline lamina is usually less than six cells wide (Fig. 1i-l). Syrrhopodon stuhlmanni Broth. remains a distinct species, apparently endemic to Tanzania. SPECIMENS EXAMINED. ‘Tanzania. Uluguru, Bergwald, 1600 m, Stuhlmann 8809 (BM!-isotype of S. stuhlmannii). Uluguru Mountains, 30 July 1941, Eccles AH8648 (BM!), AH8652 (BM!). Morogoro District. Nguru Mts, ridge above ‘Spirit Lake’ at the north source of Chazi River above Chazi Falls, 2000—2100 m, 6°00’S 37°30'E, 4 Feb- ruary 1989, Pécs & Knox 89053/AK (BM!); Lushoto District, West Usambara Mts, 5 km east of Mgwashi village on west slope of Gonja Hill, 1600-1700 m, 4° 47'S 38° 33 'E, Pécs & Krog 88205/R (BM!). Syrrhopodon gardneri (Hook.) Schwagr., Sp. musc. frond. suppl. 2 (1): 110 (1824). Fig. 2e, £,.3, Calymperes gardneri Hook. Musci Exot. 2: 146 (1819). Type: Nepal, Gardner [1205] (BM!-holotype, BM!-isotype). : Oo oe _ : _ a Oo - 7 “ 7 Botany Series Earlier Botany Bulletins are still in print. The following can be ordered from Intercept (address on inside front cover). Where the complete backlist is not shown, this may also be obtained from the same address. Volume 24 No. 1 Pre-Linnaean references for the Macaronesian flora found in Leonard Plukenet’s works and collections. J. Francisco-Ortega, A. Santos-Guerra and C.E. Jarvis. 1994. Pp. 1-34, 16 figs. Studies on the lichen genus Sticta (Schreber) Ach.: II. Typification of taxa from Swartz’s Prodromus of 1788. D.J. Galloway. 1993. Pp. 35-48, 9 figs. Seaweeds of the western coast of tropical Africa and adjacent islands: a critical assessment. IV. Rhodophyta (Florideae) 4. Genera L-O. D.M. John, G.W. Lawson, J.H. Price, W.F. Prud’ homme van Reine and W.J. Woelkerling. 1994. Pp. 49-90, 1 fig. Studies on the Cretan flora 3. Additions to the flora of Karpathos. N.J. Turland and L. 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