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Full text of "Studies of Central American plants"

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STUDIES OF 
CENTRAL AMERICAN PLANTS III 



BY 

PAUL C. STANDLEY 

CURATOR OF THE HERBARIUM, DEPARTMENT OF BOTANY 
AND 

JULIAN A. STEYERMARK 

ASSISTANT CURATOR OF THE HERBARIUM, DEPARTMENT OF BOTANY 




BOTANICAL SERIES 

FIELD MUSEUM OF NATURAL HISTORY 

VOLUME 23, NUMBER 1 

JANUARY 14, 1943 

PUBLICATION 524 



STUDIES OF 
CENTRAL AMERICAN PLANTS III 



BY 

PAUL C. STANDLEY 

CURATOR OF THE HERBARIUM, DEPARTMENT OP BOTANY 
AND 

JULIAN A. STEYERMARK 

ASSISTANT CURATOR OF THE HERBARIUM, DEPARTMENT OF BOTANY 




BOTANICAL SERIES 

FIELD MUSEUM OF NATURAL HISTORY 

VOLUME 23, NUMBER 1 

JANUARY 14, 1943 

PUBLICATION 524 



THE LIBRARY OF THE 

AUG 1 - 1049 

UNIVERSITY OF ILLIfiOiS 



PRINTED IN THE UNITED STATES OF AMERICA 
BY FIELD MUSEUM PRESS 



580-5 



STUDIES OF CENTRAL AMERICAN PLANTS III 



PAUL C. STANDLEY AND JULIAN A. STEYERMARK 



Most of the new species described on the following pages were 
collected by the authors during recent exploration in Guatemala, 
and are published here preparatory to their inclusion in the descrip- 
tive Flora of Guatemala, whose preparation is now well advanced. 
Because of present economic conditions, the descriptions and dis- 
cussions of these new plants have been somewhat abbreviated but 
they will be extended, if deemed necessary, when treated in that work. 

PINACEAE 

Juniperus Standleyi Steyermark, sp. nov. Frutex prostratus 
vel depressus vel erectus, ramulis ultimis numerosis brevibus densis 
confertis 1.1-1.4 mm. crassis 5-20 mm. longis; folia adulta ovata 
vel ovato-rotundata cucullata, apice obtusa vel rotundata, 1.5-1.7 
mm. longa, basi 0.8-1 mm. lata, medio depressa, dorso glandulosa, 
marginibus crassis incurvis minute erosis vel subintegris; folia 
juvenilia lanceolata subulata acuminata 4-5 mm. longa; bacca 
coerulescens 7-9 mm. diam., pedicello brevi recurvo pendulo; 
semina 3-4. Guatemala: Dept. San Marcos: Upper slopes of Volcan 
de Tacana, alt. 4,100-4,400 meters, February, 1940, Julian A. 
Steyermark 36137 (type in Herb. Field Mus.). Collected at various 
localities in the departments of San Marcos and Huehuetenango, 
and extending into Chiapas, Mexico. 

This has been confused with J. mexicana Spreng., also native in 
Guatemala, which is a tall or medium-sized tree with 1-2-seeded 
fruit. 

ARACEAE 

Philodendron Rojasianum Standl. & Steyerm., sp. nov. 
SubgenusEuphilodendron, Sect. Pteromischum. Epiphytica scandens, 
ramulorum internodiis superioribus ca. 4 cm. longis et 8 mm. crassis; 
petiolus ca. 16 cm. longus crassus, vagina ca. 1 cm. lata foliacea 
persistente ca. 1-2 cm. infra apicem soluta atque ca. 1.5 cm. longe 
protracta, apice obtusissima; lamina tenuiter coriacea rigidula late 
oblongo-ovata ca. 21 cm. longa et 11-13.5 cm. lata, apice obtusa 
vel subrotundata et breviter cuspidato-acuminata, basi lata breviter 
lateque cordata, nervis primariis utroque latere ca. 10 angulo 

3 



4 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. 23 

latissimo abeuntibus tenuibus quam secundariis et tertiariis solem- 
niter crassioribus; pedunculus crassus vix ultra 1.5 cm. longus; 
spatha oblongo-linearis ca. 14 cm. longa prope basin 2 cm. lata 
viridis, spadice viridi. Guatemala: Climbing on tree along a small 
stream, Finca Pirineos, lower southern slopes of Volcan de Santa 
Maria, between Santa Maria de Jesus and Calahuache", Dept. 
Quezaltenango, alt. 1,300-1,500 meters, December, 1939, Julian A. 
Steyermark 33244 (type in Herb. Field Mus.). 

This may be only an extreme form of P. guttiferum Kunth, but 
in that the petioles usually are relatively shorter and the ligule of 
the petiole sheath much less developed. Also related is P. rigidi- 
folium Krause of Panama, but that also has a less developed petiole 
sheath. The ligule of the sheath in P. Rojasianum is sometimes as 
much as 2.5 cm. long. The new species is named for Professor 
Ulises Rojas, Director of the Jardin Botanico de Guatemala. 

AMARYLLIDACEAE 

Agave huehueteca Standl. & Steyerm., sp. nov. Subgenus 
Littaea. Folia numerosa rosulata oblongo-ovata vel obovata ca. 
35 cm. longa atque 10 cm. lata, vel minora majorave, suberecta vel 
adscendentia, subincurva, plus minusve concava, laevia, crassa, 
fibrosa, griseo-viridia vel glaucescentia, rigida; spina terminalis 
conica vel elongato-conica 2.5-4 cm. longa basi ca. 6 mm. crassa 
griseo-brunnea, interdum lucida, superne teres, inferne late sulcata; 
margen folii late corneo-incrassatus griseus, dentibus plerumque 
5-11 mm. longis complanatis griseis latissimis saepe curvis vel 
recurvis; inflorescentia 3-5-metralis simplex spicata erecta, spica 
densa elongata, bracteis numerosis, superioribus e basi lata fere 
setaceis elongatis, floribus fere sessilibus fasciculatis; ovarium 
fusiforme ca. 12 mm. longum et 4 mm. crassum; perianthii tubus 
obconicus 5 mm. longus, segmentis anguste oblongis 2-2.5 cm. 
longis obtusis; stamina longiexserta, antheris fere 2 cm. longis; 
capsula late ovalis 2 cm. longa 12 mm. lata viridis breviter sulcata; 
semina semiorbicularia ca. 4 mm. longa. Guatemala: Dept. Huehue- 
tenango: Open limestone hillside, along Aguacatan road east of 
Huehuetenango at km. 13-14, altitude about 1,950 meters, January 
2, 1941, Paul C. Standley 82039 (type in Herb. Field Mus.). Dry 
rocky hills north of Chiantla, 2,000-2,250 meters, January 6, 1941, 
Standley 82588. Near crossing of Rio San Juan Ixtan, east of San 
Rafael Pe"tzal, 1,730 meters, January 9, 1941, Standley 82857. 

Perianth dark purplish green; filaments and style dark purplish 
red. Only one other species of the subgenus Littaea has ever been 



STUDIES OF CENTRAL AMERICAN PLANTS III 5 

reported from Guatemala, A. dasylirioides Jacobi & Bouche", and 
that is an altogether different plant with unarmed leaves. It is 
quite possible that ultimately A. huehueteca will have to be united 
with one of the Mexican species, but we have been unable to refer 
it satisfactorily to any of the species of this subgenus listed by 
Trelease from Mexico. 

POLYGONAGEAE 

Gymnopodium floribundum Rolfe, var. antigonoides (Rob.) 
Standl. & Steyerm., stat. nov. Millspaughia antigonoides Rob. Bot. 
Jahrb. 36, Beibl. 80: 14. 1905. 

Triplaris melaenodendron (Bertol.) Standl. & Steyerm., comb, 
nov. Vellasquezia melaenodendron Bertol. Fl. Guat. 40. pL 11. 1840. 
T. Macombii Donn. Smith, Bot. Gaz. 19: 257. 1894. 

NYCTAGINACEAE 

Mirabilis pulchella Standl. & Steyerm., sp. nov. Herba vel 
frutex erectus 30-100 cm. altus ramosus, ramis vetustioribus plus 
minusve glaucis ad nodos incrassatis, novellis dense pilis plurilo- 
cularibus villosis; petioli usque 1.5 cm. longi, foliorum superiorum 
multo breviores, dense longivillosi; lamina late ovata usque oblongo- 
ovata vel deltoideo-ovata 3-8.5 cm. longa 2.5-5.5 cm. lata acuta vel 
acuminata, basi plus minusve inaequali truncata usque obtusa, 
crassiuscula, utrinque subsparse pilis patentibus villosa, subtus paullo 
pallidior; pedunculi axillares et in cymulas vel racemos terminales 
parvos dispositi, usque ad 1.5 cm. longi sed saepius multo breviores 
dense villosi; involucrum campanulatum vel in statu maturo fere 
rotatum 7-10 mm. longum viride triflorum villosum, profunde 
5-lobum, lobis triangulari-ovatis acutis vel acuminatus ciliatis; 
perianthium coralloideum roseo-purpureum 1 cm. longum infundibuli- 
formi-campanulatum glabrum vel glabratum; stamina 3 exserta; 
fructus obovoideus ca. 5 mm. longus et 2.5 mm. latus obtuse 5- 
costatus, basin versus angustatus, sat dense pilosulus, costis crassis 
laevibus vel plus minusve corrugatis, sulcis rugulosis. Guatemala: 
Dept. Zacapa, brushy rocky slope, near divide on the road between 
Zacapa and Chiquimula, alt. 500-660 meters, October, 1940, Paul C. 
Standley 73841 (type in Herb. Field Mus.). Dept. Chiquimula, near 
the same locality as the preceding collection, Standley 73748. Dept. 
Chiquimula, between Ramirez and Cumbre de Chiquimula, on road 
between Chiquimula and Zacapa, 400-600 meters, Standley 74516. 



6 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. 23 

The plant is frequent in the vicinity of the type locality, growing 
in damp thickets or on brushy rocky slopes. It is rather handsome 
and showy because of the abundance of rose-purple flowers, which 
close around noon, as in other species of the genus. Except for the 
widespread tropical Mirabilis violacea (L.) Heimerl, this is the first 
Mirabilis of the subgenus Oxybaphus to be reported from Central 
America. Its relationship is with M. suffruticosa Standl., of Oaxaca, 
which has merely puberulent branches and rounded or obtuse invo- 
lucral lobes. 

PHYTOLACCAGEAE 

Stegnosperma scandens (Lunan) Standl., comb. nov. Tri- 
chilia scandens Lunan, Hort. Jam. 2: 320. 1814. S. halimifolium 
Benth. Bot. Voy. Sulph. 17. 1844. 

BERBERIDACEAE 

Mahonia volcania Standl. & Steyerm., sp. nov. Frutex erectus 
pauciramosus 1-2-metralis; folia breviter petiolata, foliolis 2-6-jugis 
approximatis; foliola rigide coriacea sessilia ovalia usque oblongo- 
ovalia vel late oblonga 2-4 cm. longa 1-1.7 cm. lata apice rotundata 
vel late obtusa et spinoso-mucronata, basi rotundata vel late obtusa, 
in toto margine spinoso-mucronato-serrata, serraturis parvis sub- 
adpressis, glabra, supra lucida, venulis prominulis pallidis arete 
reticulatis, subtus pallida, nervis venisque prominentibus reticulatis; 
flores racemosi, racemis sat dense multifloris ca. 3 cm. longis breviter 
pedunculatis, bracteis bracteolisque parvis inconspicuis acuminatis 
vel interdum obtusis et denticulatis, pedicellis gracilibus sed rigidulis 
usque 10 mm. longis; sepala exteriora late ovata 2 mm. longa; 
petala lutea ca. 6-7 mm. longa; baccae immaturae sessiles glabrae. 
Guatemala: Pine forest, slopes of Volcan de Agua along the trail 
above Santa Maria de Jesus, alt. about 3,000 meters, February, 
1939, Paul C. Standley 65221 (type in Herb. Field Mus.); same 
region, January, 1937, J. R. Johnston 580. Region of Che"mal, 
Huehuetenango, 3,300 meters, December, 1940, Johnston 1690. 

This plant has been confused heretofore with M. fascicularis DC., 
which ranges from southern California southward to Veracruz. It 
is closely related to that species but apparently uniformly distinct 
in its small compact leaves, whose leaflets have small and appressed 
teeth rather than the large spreading ones characteristic of M. 
fascicularis. 

Mahonia Johnstonii Standl. & Steyerm., comb. nov. Berberis 
Johnstonii Standl. & Steyerm. Bot. Ser. Field Mus. 22: 140. 1940. 



STUDIES OF CENTRAL AMERICAN PLANTS III 7 

ANNONAGEAE 

Annona primigenia Standl. & Steyerm., sp. nov. Arbor usque 
10-metralis vel frutex altus, ramulis gracilibus glabris vel primo 
sparse pilis brevibus adscendentibus indutis; folia modica breviter 
petiolata membranacea in sicco fuscescentia, petiolo glabro 7-14 mm. 
longo; lamina elliptica usque lanceolato-oblonga vel obovato-oblonga 
8-14 cm. longa 3-6 cm. lata, acuta vel abrupte acutata, interdum 
acuminata, basi subrotundata usque subacuta, supra glabra sub- 
lucida, costa anguste impressa, subtus fere concolor saltern in statu 
adulto glabra in axillis nervorum obscure domatiata, nervis laterali- 
bus utroque latere ca. 10 teneris; inflorescentiae e medio internodii 
exeuntes pluriflorae, pedicellis fructiferis glabris 1.5-3 cm. longis 
rectis; fructus subglobosus 1.5-3 cm. diam., fere laevis vel interdum 
distinctius areolatus, sparse puberulus vel fere glaber; semina pauca 
vel numerosa lucida fusco-brunnea ca. 8 mm. longa. Guatemala 
(Dept. Pete'n) : Gavilan, Fallabon-Yaxha road, March, 1933, C. L. 
lAindell 2213 (type in Herb. Field Mus.), 2215. Uaxactun, April, 
1931, H. H. Bartlett 12474. British Honduras: San Antonio, high 
ridge, P. H. Gentle 569. Mexico: Tuxpena, Campeche, December, 
1931, Lundell 1128. 

Called Anonillo in Pete'n. The fruit is described as russet- 
colored and edible. It is probable that the species is represented also 
by Lundell 6651 from San Agustin, British Honduras. This speci- 
men is in flower, the flowers being 1.5 cm. long, and like those of 
A. reticulata L., except that they are less densely pubescent. 

The relationship of A. primigenia is with A. reticulata but in 
that, one of the important fruit trees of all Central America, the 
fruits are 10 cm. or often much more in diameter. It seems reason- 
able to assume that the small-fruited tree of the Yucatan Peninsula 
is a distinct species. 

Sapranthus megistanthus Standl. & Steyerm., sp. nov. 
Arbor 9-metralis, ramulis novellis dense pilis mollibus subpatentibus 
ochraceis tomentosis; folia crasse 5-6 mm. longe petiolata mem- 
branacea, petiolo dense ochraceo-piloso; lamina oblongo-elliptica 
10-14 cm. longa 5.5-7 cm. lata acuta vel obtusa, basi obtusa, supra 
viridis molliter atque sat dense pilis albidis velutino-pilosa, subtus 
paullo pallidior ubique dense velutino-pilosa, reticulo venularum 
eleganter prominulo-reticulato; pedunculi oppositifolii crassi 1.5 cm. 
longi tomentosi; sepala utrinque tomentella anguste lanceolato- 
oblonga 2-2.5 cm. longa basi 7 mm. lata nervosa; petala maxima 
atropurpurea, intus sparse puberula extus subsparse tomentella, 



8 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. 23 

oblanceolato-oblonga 17-19 cm. longa ca. 7 cm. lata, apicem sub- 
obtusum versus angustata, basin versus longe attenuata. Guate- 
mala: On roadside bank, Estancia Grande, Dept. Guatemala, alt. 
about 600 meters, December 8, 1938, Paul C. Standley 59219 (type 
in Herb. Field Mus.). 

Only one tree was observed. The flowers are pendent, dark 
purple-brown, and have a very strong and offensive, carrion-like 
odor. The type was determined originally as S. nicaraguensis Seem., 
but more careful examination shows that probably it represents a 
perfectly distinct species. In that the petals are only half as large, 
and the sepals are much shorter and relatively broader. The flowers 
are twice as large as those of any other member of the genus. 

MENISPERMACEAE 

Hyperbaena vulcania Standl. & Steyerm., sp. nov. Frutex 
scandens, ramulis subteretibus puberulis vel dense breviter patenti- 
pilosulis, glabrescentibus; folia longipetiolata subcoriacea, petiolo 
2-7 cm. longo et ultra pilosulo vel puberulo, serius glabrato, apice 
paullo incrassato; lamina integra ovalis vel rotundo-ovalis usque 
ovata vel rotundato-ovata vulgo 9-20 cm. longa atque 5.5-13 cm. 
lata, apice obtusa vel rotundata et acuminata vel breviter acuminata, 
basi rotundata usque breviter cordata, interdum obtusa, supra lucida 
glabra, subtus brunnescens ad nervos pilosula vel puberula vel fere 
omnino glabra, ima basi 5-nervia, costa supra basin utroque latere 
nervos laterales vulgo 3 emittente, nervis venisque elevatis gracilibus, 
venulis prominentibus laxe reticulatis, ultimis reticulum densum 
prominulum efformantibus; flores feminei racemosi, racemis axillari- 
bus pedunculatis vel sessilibus 7-12 cm. longis laxe paucifloris, 
rhachi pedicellisque densiuscule pilosiusculis vel brunneo-puberulis, 
pedicellis crassiusculis 6-15 mm. longis; sepala interiora 5 mm. longa 
late ovata obtusa dense minute puberula, apicibus recurvis, exteri- 
oribus minutis ovatis; carpella densissime breviter pilosa. Guate- 
mala: Moist forest, a large vine over a tree, near Barranco Hondo, 
above Las Lajas, Dept. Escuintla, alt. about 1,200 meters, January, 
1939, Paul C. Standley 63878 (type in Herb. Field Mus.). Dept. 
Quezaltenango, between Finca Pirineos and Finca Soledad, lower 
southern slopes of Volcan de Santa Maria, 1,300 meters, Steyermark 
33517. Dept. San Marcos, vicinity of Finca El Porvenir, southern 
slopes of Volcan de Tajumulco, 1,300-1,500 meters, Steyermark 
37944, 37343, 37535. 

Related to H. hondurensis Standl., which occurs in northern 
Guatemala but differs in having pistillate inflorescences with pedicels 



STUDIES OF CENTRAL AMERICAN PLANTS III 9 

only 2-4 mm. long or even shorter. Most of the collections cited 
above are sterile, but probably belong to H. vulcania. 

ROSACEAE 

Hirtella media Standl., sp. nov. Arbor glabrata 10-20-metralis, 
trunco usque 50 cm. diam., ramulis strigillosis vel fere glabris; 
folia inter minora breviter petiolata coriacea, petiolo ad 4 mm. 
tan turn longo; lamina elliptico-obovata usque elliptico-oblonga 
saepius paullo supra mediam latissima, 4.5-10 cm. longa 2-5 cm. 
lata, apice obtusa vel subacuta, basi cuneato-angustata et acuta, 
supra glabra in sicco fuscescens glabra, costa prominente, subtus 
fere concolor fere glabra sed saltern ad costam sparse strigosa; 
inflorescentiae terminales thyrsoideo-paniculatae sat dense multiflorae 
foliis paullo longiores, ramis dense minute sericeis vel glabratis, 
interdum elongatis et recurvis, secundifloris, floribus breviter pedi- 
cellatis vel sessilibus, bracteis ovatis parvis acutiusculis persistentibus 
conspicuis; hypanthium obovoideum adpresse pilosulum, sepalis 
reflexis late ovatis vel rotundo-ovalibus intus minute sericeis obtusis- 
simis; petala late obovata alba vel lavendulacea glabra; stamina 
3 longissime exserta; ovarium dense pilosum; drupa juvenilis oblongo- 
obovoidea apice late rotundata sparse breviterque strigosa. 
Honduras: Guarunta, Wispernini Camp, Dept. Colon, alt. 15-23 
meters, March, 1938, Christine & Wolfgang von Hagen 1378 (type 
in Herb. Field Mus.). Mexico: Lobani, Oaxaca, 1841-43, Liebmann 
1751. Ubero, Oaxaca, alt. 30-90 meters, June, 1937, Llewelyn 
Williams 9480. 

Related to H. triandra Swartz, a common species of Central 
America, which has larger long-acuminate leaves. H. media is 
noteworthy for the large size the tree attains, according to data 
supplied with three collections. Most species of the genus are shrubs 
of only 2-3 meters, and but few of the species attain such a height 
as 15 meters. The vernacular names used in Oaxaca are Jicaco 
and Jicaco prieto. 

LEGUMINOSAE 

Aeschynomene eriocarpa Standl. & Steyerm., sp. nov. 
Annua prostrata, caulibus dense breviter albido-pilosis, pilis paucis 
longioribus viscidis patentibus intermixtis; stipulae parvae basi 
non productae late ovatae acutae striato-nervosae; folia parva, 
foliolis 3-4-jugis late oblongo-obovatis 5-8 mm. longis 3-5 mm. 
latis, apice late rotundatis, supra glabris, subtus pilis longis albidis 
subadpressis pilosis; racemi foliis longiores pauciflori, interdum 



10 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. 23 

elongato-racemosi, rhachi valde geniculata dense albido-pilosa et 
viscido-pilosa, bracteis late ovatis obtusis pilosis; calyx 3 mm. longus 
dense breviter pilosus; corolla flava 7 mm. longa, vexillo sparse 
pilosulo; legumen vulgo 3-articulatum densissime albo-tomentosum, 
articulis isthmo angustissimo junctis semiorbicularibus. Guate- 
mala: Zacapa, rocky slopes, Santa Rosalia, 2 miles south of Zacapa, 
alt. 200 meters, October 7, 1939, Julian A. Steyermark 29313 (type 
in Herb. Field Mus.). 

Similar in most details to A. biflora (Mill.) Fawc. & Rendle, 
but distinct from that and the several other related species in its 
densely white-tomentose fruits, which bear no viscid hairs. 

Aeschynomene tricholoma Standl. & Steyerm., sp. nov. 
Annua erecta ramosa ca. 60 cm. alta, caulibus dense viscido-hispidis; 
stipulae lineari-attenuatae basi productae striatae pectinato- 
dentatae hispidulae; foliola ca. 23-juga lineari-oblonga 5-10 mm. 
longa, obtusa vel subacuta et mucronata, apice denticulata, glabra, 
costa valde excentrica, nervis subtus prominentibus; racemi elongati 
laxi foliis subaequilongi, ramis hispidulis, bracteis lanceolato-ovatis 
longiacuminatis grosse dentatis, dentibus longe setoso-mucronatis; 
flores 7 mm. longi, calyce bilabiate glabro; vexillum glabrum; 
legumen marginibus sparse ciliatis exceptis glabrum, uno latere fere 
rectum, altero profunde constrictum, articulis vulgo 4, interdum 5, 
semiorbicularibus, laxe et subprominente reticulato-venosis, stipite 
calyce vix longi ore. Guatemala: Dept. Chiquimula, brushy rocky 
slope, near the divide on the road from Zacapa to Chiquimula, alt. 
660 meters, October, 1940, Paul C. Standley 73714 (type in Herb. 
Field Mus.). Dept. Jutiapa, region of El Tablon, northeast of 
Jutiapa, alt. 900 meters, damp thicket, October 31, 1940, Standley 
75840. 

In general appearance as well as in most details this is exactly 
like A. americana L. but it differs in having uniformly much broader 
pods, of somewhat distinctive appearance, and it is believed that a 
good species, perhaps of very local distribution, is represented. 

Bauhinia Herrerae (Britt. & Rose) Standl. & Steyerm., comb, 
nov. Schnella Herrerae Britt. & Rose, N. Amer. Fl. 23: 206. 1930. 

Canavalia munda Standl. & Steyerm., sp. nov. Frutex 
scandens, caulibus glabris, petiolis foliolis brevioribus; foliola ob- 
longo-elliptica vel oblongo-ovata 8-13 cm. longa 4-6 cm. lata acumi- 
nata vel anguste longiacuminata, basi rotundata vel obtusa, longi- 
petiolulata, glabra, subtus sparse albido-punctata; racemi nodosi 



STUDIES OF CENTRAL AMERICAN PLANTS III 11 

folia aequantes vel longiores; calyx campanulatus 10-12 mm. longus 
subdense sericeus, labio superiore tubo multo breviore emarginato, 
labio inferiore brevi, lobis 3 ovatis obtusis; corolla lilacina fere 3 cm. 
longa, vexillo lato ad anthesin reflexo; legumen 13-16 cm. longum 
3 cm. latum, dense pilis fusco-brunneis velutino-pilosum, breviter 
stipitatum, valvis 3-costatis, costa media a sutura ventrali 7-8 mm. 
remota; semina late ovalia compressa castanea lucida 12-15 mm. 
longa 9-12 mm. lata, hilo fusco 5 mm. longo. Guatemala: Dept. 
Quezaltenango: Finca Pirineos, low southern slopes of Volcan de 
Santa Maria, between Santa Maria de Jesus and Calahuache", 
alt. 1,300-1,500 meters, December, 1939, Julian A. Steyermark 33179 
(type in Herb. Field Mus.). Several other collections seen from the 
departments of Quezaltenango and San Marcos, western Guatemala. 

Related to C. villosa Benth., in which the leaflets usually are 
abundantly pubescent and not punctate. 

Climacorachis guatemalensis Standl. & Steyerm., sp. nov. 
Herba annua erecta usque 80 cm. alta simplex vel ramosa, interdum 
suffrutescens, praeter inflorescentiam glabra; stipulae angustae 1 cm. 
longae prope medium affixae; foliola ca. 20-juga 6-8 mm. longa 1.5 
mm. lata oblique acuta 3-nervia sessilia; racemi pauciflori flexuosi 
folia aequantes vel longiores, rhachi viscido-setulosa, pedicellis longis 
gracilibus; bracteae ovatae setuloso-ciliatae; calyx 3 mm. longus 
viscido-setulosus; legumen oblongum 1.5-2 cm. longum 5-7 mm. 
latum parum compressum, apice oblique rotundatum vel truncatum, 
densiuscule viscido-setulosum, pilis basi dilatatis et nigrescentibus; 
semina globosa 2 mm. diam. opaca nigro-olivacea. Guatemala: 
Dept. Huehuetenango: Pine-oak forest, Rio Pucal, about 14 km. 
south of Huehuetenango, alt. about 1,800 meters, January, 1941, 
Paul C. Standley 82330 (type in Herb. Field Mus.) ; also no. 82370 
from the same locality. 

Two other members of this genus are known, each from a single 
collection made in Jalisco, Mexico. Both differ from the Guatemalan 
plant in their narrower fruit which is more or less constricted along 
the ventral margin. 

Inga Skutchii Standl., sp. nov. Arbor 9-metralis, ramulis 
novellis pilis mollibus brevibus fulvis adscendentibus sat dense 
pilosis; folia inter minora ca. 12-13 cm. longa, rhachi dense pilis 
subadpressis fulvis pilosa, inter paria foliolorum glandula parva 
subglobosa elevata onusta; foliola parva 6-8-juga membranacea 
lanceolato-oblonga vel anguste elliptico-oblonga, terminalia paullo 



12 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. 23 

majora, infima valde reducta, media et terminalia 3.5-5.5 cm. longa 
1.2-2 cm. lata, apicem versus breviter vel longius angustata, apice 
ipso anguste obtuso et mucronato-apiculato, basi subinaequali obtusa 
vel anguste rotundata, supra ad costam breviter pilosa, aliter glabra, 
subtus paullo pallidiora sparse, ad costam densius, pilis parvis 
rigidis subadpressis hirtello-pilosa, costa nervisque lateralibus pro- 
minulis; flores albi spicati, spicis solitariis vel fasciculatis 10-11 cm. 
longis ca. 3 cm. longe pedunculatis remote laxeque multifloris, rhachi 
dense breviter adpresso-pilosa; calyx anguste tubulosus 5 mm. 
longus sparse hirtellus, lobis ovatis acutiusculis tubo bene brevioribus; 
corolla ca. 13 mm. longa dense strigosa, lobis ovatis acutis vix ultra 
2 mm. longis; stamina ca. 3.5 cm. longa. Costa Rica: By a forest 
stream, basin of El General, Prov. San Jose", alt. 675-900 meters, 
March, 1940, Alexander F. Skutch 4823 (type in Herb. Field Mus.). 
An exceptionally distinct species for the genus; easy of recogni- 
tion among Costa Rican ones because of the combination of numerous 
small leaflets and elongate, remotely flowered spikes. 

Pachecoa Standl. & Steyerm., gen. nov. Frutices erecti ramosi 
pilosi; stipulae lineari-subulatae striato-nervosae; folia imparipinnata, 
foliolis paucis integris mucronatis exstipellatis herbaceis; flores flavi, 
pedunculis axillaribus rigidis plerumque 2-floris; bracteae parvae 
lanceolatae rigidae, bracteolis subulatis vel fere filiformibus denticu- 
latis; calyx basi attenuatus et stipitiformis, prpfunde 5-lobus, lobis 
lanceolato-attenuatis, 4 subaequalibus, infimo paullo longiore et 
angustiore; vexillum suborbiculare extus pilosum unguiculatum, alis 
oblique obovatis, carina incurva obtusa; stamina in tubum clausum 
connata, antheris ovalibus uniformibus; ovarium sessile pauci- 
ovulatum, stylo elongate, stigmate minuto terminali; legumen lineari- 
oblongum subtetragonum, suturis rectis, articulis quadratis dense 
breviter pilosis. Type species, Pachecoa guatemalensis Standl. & 
Steyerm. 

The genus is dedicated to Don Mariano Pacheco Herrarte, 
Director General de Agricultura de Guatemala, who for many years 
has labored with signal success to improve agricultural conditions 
in this republic. His celebrated gardens, and particularly their 
fine collection of orchids, are one of the most interesting sights to 
be seen in Guatemala City. His exhibits of orchids and other 
ornamental plants and of agricultural products of Guatemala supply 
each November one of the most attractive and instructive sections 
of the Feria Internacional that draws so many visitors from all 
Central America as well as from Mexico and the United States. 



STUDIES OF CENTRAL AMERICAN PLANTS III 13 

This genus is obviously related to Chapmannia Torr. & Gray, 
confined to Florida. Chapmannia is a herbaceous plant with similar 
leaves but with a long, terminal, wand-like, almost naked inflores- 
cence; the calyx is closed in bud, and has very short, broad teeth; 
the legume is glandular-muricate and deeply constricted into ovoid 
subterete joints. Pachecoa is a tall shrub with hard stems and small 
axillary inflorescences; the calyx is open in bud and has long narrow 
lobes; the legume is merely pilose, not at all constricted between 
the seeds, the joints being quadrate and in cross section somewhat 
tetragonous. 

Pachecoa guatemalensis Standl. & Steyerm., sp. nov. Frutex 
erectus 2-3-metralis, ramis striatis dense pilosis et sparse pilis viscidis 
luteis patentibus setulosis; stipulae persistentes adpresso-pilosulae 
5-8 mm. longae; folia parva breviter petiolata; foliola vulgo 3-5 
alterna breviter petiolulata late elliptica vel ovalia 13-25 mm. longa 
7-14 mm. lata, apice rotundata et mucronata, basi obtusa vel 
rotundata, supra viridia pilosa et sparse setulosa, subtus dense pilis 
albidis subadpressis laxis pilosa; pedunculi folia aequantes vel 
breviores, pilosi et setulosi; calyx ca. 8 mm. longus pallide viridis 
adpresso-pilosus et sparse supra medium setulosus, lobis tubum 
fere aequantibus angustis attenuatis setoso-ciliatis; petala pallide 
aurantiaca, vexillo ca. 15 mm. longo extus dense piloso; legumen 
1.5 cm. longum apice rostro 4-5 mm. longo auctum, 3-4 mm. latum, 
sessile, dense pilis brevibus non viscidis subpatentibus pilosum. 
Guatemala: Dept. Jutiapa: Damp thicket near Jutiapa, alt. 850 
meters, October, 1940, Paul C. Standley 75307 (type in Herb. Field 
Museum); also no. 75032 from the same locality. Mexico: "Rio 
Taba" (locality not certainly decipherable), 1841-43, Liebmann. 

The plant is abundant in thickets at the northeastern edge of 
Jutiapa, where it forms dense stands of considerable extent on some 
of the hillsides. 



Dichapetalum Brenesii Stand!., sp. nov. Frutex vel arbor 
4-8-metralis, trunco usque 20 cm. diam., cortice laevi griseo, ramulis 
brunnescentibus sat gracilibus densiuscule sericeis vel strigosis, 
glabrescentibus, internodiis plerumque brevibus; stipulae parvae 
cito deciduae; folia modica breviter petiolata in sicco fusca sub- 
lucida crasse membranacea, petiolo crassiusculo vulgo 5-7 mm. 
longo; lamina elliptico-oblonga vel lanceolato-oblonga media vel 
paullo supra mediam latissima vulgo 7-15 cm. longa et 3.5-6 cm. 



14 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. 23 

lata subabrupte longiacuminata, basin acutam versus angustata, 
supra ad costam nervosque strigosa, aliter glabra vel glabrata, venulis 
prominulis, subtus concolor ad nervos venasque strigosa vel fere 
omnino glabra; cymae parvae vulgo dense multiflorae, petiolo fere 
omnino cum pedunculo adnato, ramis dense sordide sericeis, floribus 
breviter crasseque pedicellatis congestis; bracteae parvae lineares 
extus tomentellae; sepala 2-2.5 mm. longa extus dense albido-tomen- 
tosa; drupa clavata vel anguste obovato-oblonga 2.5-3.5 cm. longa 
dense sordide adpresso-tomentulosa vix compressa. Costa Rica: 
Zarcero, alt. 1,950 meters, deep forest, April, 1937, Austin Smith 
4120 (type in Herb. Field Mus.). La Palma de San Ramon, March, 
1929, A. M. Brenes 6766. La Ventolera, southern slope of Volcan 
de Poas, 1,700 meters, wooded quebrada, Standley 34723, 34674. 
Zarcero, Austin Smith 4104, 366519. Las Lajas de Zarcero, 1,575 
meters, Smith 746. La Brisa de Zarcero, 2,200 meters, Smith H971. 
Panama: Progreso, Chiriqui, Cooper & Slater 172. 

Heretofore the Costa Rican tree has been identified with D. 
Donnell-Smithii Engler, of Guatemala. It is, however, more closely 
related to D. chiapasense Standl., which ranges from Chiapas to 
British Honduras and Honduras, but is sufficiently distinct in its 
acute-based leaves and larger, narrower, minutely tomentulose fruit. 
D. Donnell-Smithii, confined so far as now known to Guatemala, 
has much larger and relatively broader, thin, densely pilose leaves. 
D. Brenesii is called Blancito in Panama. The corolla is described 
as white to cream-colored or pale yellow. 

SAPINDACEAE 

Serjania lobulata Standl. & Steyerm., sp. nov. Frutex alte 
scandens, ramis subteretibus, novellis minute cano-puberulis; corpus 
lignosum simplex teres; folia pinnatim 5-foliolata, petiolo ut rhachi 
nudo puberulo; foliola inferiora longiuscule petiolulata, superiora 
sessilia, rhombea vel rhombeo-ovata, interdum oblongo-elliptica, 
4-10 cm. longa 2-6 cm. lata, acuta vel obtusa, basi truncata usque 
acuminata vel cuneatim attenuata, grosse remoteque crenulata vel 
fere lobata, supra sat dense puberula, subtus pallidiora ubique 
dense breviter pilosula; thyrsi foliis breviores dense ochraceo- 
tomentulosi, cincinnis longipedunculatis paucifloris, bracteis minutis, 
pedicellis brevibus; sepala dense cano-tomentulosa 3.5-4 mm. longa 
suborbicularia apice rotundata; petala alba 5 mm. longa glabra 
intus glandulis parvis conspersa; fructus late cordatus ca. 2 cm. 
longus atque 2.5 cm. latus superne parum angustatus, loculis duris 



STUDIES OF CENTRAL AMERICAN PLANTS III 15 

subglobosis dense hirtellis rugoso-venosis, dissepimentis latis, alis 
tenuibus dense puberulis infra loculos non constrictis. Guatemala: 
Dept. Chiquimula, near the divide on the road from Zacapa to 
Chiquimula, brushy rocky slope, alt. about 660 meters, October, 
1940, Paul C. Standley 73715 (type in Herb. Field Mus.). Dept. 
Zacapa, rocky slopes near Santa Rosalia, 250-300 meters, October, 
1939, Steyermark 29019; vernacular name Chilmecate. 

Related to S. Schiedeana Schlecht. of Mexico, which has a different 
stem structure, much denser and more abundant pubescence, smaller 
flowers, and larger fruits. 

Serjania macrocarpa Standl. & Steyerm., sp. nov. Frutex 
scandens, ramis obtuse trigonis dense pilis subpatentibus brunneo- 
pilosis vel subtomentosis; corpus lignosum e centrali magno subtereti 
et periphericis 3 parvis com posi turn; folia biternata, petiolo nudo, 
rhachi anguste marginata; foliola lanceolato-oblonga usque obovato- 
elliptica vel oblongo-elliptica 5-13 cm. longa 2.5-5.5 cm. lata acumi- 
nata vel abrupte acuminata, basi attenuata ad acuta, sessilia, sub- 
grosse remoteque crenato-serrata, supra sublucida tantum ad nervos 
puberula, subtus pallidiora sat dense velutino-pilosa; flores non visi; 
fructus ambitu late cordatus ca. 4 cm. longus et 4.5 cm. latus ubique 
dense molliter pilosulus vel ad loculos tomentosus, loculis triangulari- 
bus dorso acutissimis et subalatis, dissepimentis latissimis, alis 
tenuibus infra loculos non angustatis conspicue venosis. Guate- 
mala: Los Amates, Dept. Izabal, February 23, 1908, W. A. Keller- 
man 7532 (type in Herb. Field Mus.). British Honduras: Vaca, 
El Cayo District, on hill slope, March, 1938, P. H. Gentle 2291. 

The fruits are distinctive and not similar to those of any Mexican 
or Central American species of which we have seen material. They 
are unusually large and remarkable for the large hard seed-bearing 
portion, which is triangular in cross section and almost winged 
dorsally, the partition walls being relatively broader than in most 
species of the genus. 



Pseudabutilon inornatum Standl. & Steyerm., sp. nov. 
Frutex 1.5-3 m. altus ramosus, ramis pallidis dense pilis stellatis 
valde inaequilongis tomentosis; folia longipetiolata membranacea, 
petiolo 2.5-11 cm. longo; lamina late ovata vel rotundo-ovata 
6-17 cm. longa 5-12 cm. lata acuminata vel longiacuminata, basi 
breviter cordata, crenato-dentata, inferioribus interdum angulatis 
vel breviter trilobis, supra viridis sparse minute stellato-puberula, 



16 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. 23 

subtus paullo pallidior sparse vel subdense stellato-hirtella; flores 
in racemos elongates interruptos paniculatos dispositi, plerumque 
aggregati, breviter pedunculati, pedunculis calyce vulgo brevioribus 
stellato-pilosis; calyx in statu fructifero campanulatus carpidia 
arete amplectens 5 mm. longus dense stellato-hispidulus, breviter 
5-lobatus, lobis latissime ovatis acutis; fructus 6-8-carpidiatus ca. 
5 mm. altus et 6 mm. latus, carpidiis apice late rotundatis dorso 
densissime stellato-hirtellis; semina uniseriata; carpidia dissepimento 
a dorso oriente fere perfecte 2-locularia. Guatemala: Near Ama- 
titlan, Dept. Guatemala, alt. 1,170 meters, December, 1938, Paul C. 
Standley 61425 (type in Herb. Field Mus.) ; also no. 61400 from the 
same locality, growing in dry forest; John R. Johnston 1714. 
Mexico: Rio de Santa Maria, near Zacuapan, Veracruz, rocky soil, 
November, 1906, C. A. Purpus 2239. 

Evidently referable to the subgenus Abutilastrum, and related 
to P. paniculatum (Rose) R. E. Fries of western Mexico. In that 
the fruit consists of 10-11 carpels which are acute or sharply angulate 
at the apex, while in P. inornatum they are broadly rounded, without 
any indication of an angle, and fewer. 

GARRYACEAE 

Garrya corvorum Standl. & Steyerm., sp. nov. Frutex 2- 
metralis, ramulis crassis lucidis, novellis dense pilis albidis subad- 
pressis indutis; folia parva rigide coriacea breviter petiolata, petiolo 
3-5 mm. longo piloso; lamina oblonga vel elliptico-oblonga 2.5-4.5 
cm. longa 1-1.5 cm. lata, apice obtusa vel subacuta et apiculata, 
basi obtusa vel anguste rotundata, supra lucida fere glabra, costa 
nervisque manifeste impressis, subtus opaca sat dense pilis albidis 
subadpressis pilosa, costa prominente, nervis lateralibus parum 
prominentibus inconspicuis, venis obsoletis; racemi masculi 3-3.5 cm. 
longi breviter pedunculati simplices terminales solitarii ubique dense 
pilis longis albidis pilosi; bracteae latissime ovatae usque 8 mm. 
longae alte connatae, cuspidato-acutae. Guatemala: Dept. Huehue- 
tenango, dense rocky (limestone) Juniperus forest, along the road 
in the region of Che'mal, Sierra de los Cuchumatanes, at km. 36, 
altitude about 3,300 meters, December, 1940, Paul C. Standley 
81651 (type in Herb. Field Mus.). 

Only one shrub of the species was found. The only other species 
known from Central America, Garrya laurifolia Hartweg, differs in 
having much narrower bracts in the racemes, and much larger leaves 
in which the venation is not impressed or scarcely so. 



STUDIES OF CENTRAL AMERICAN PLANTS III 17 

CLETHRACEAE 

Clethra bimatris Standl. & Steyerm., sp. nov. Arbor 12- 
metralis, trunco 30 cm. diam., ramulis densissime pilis longis laxis 
sordide brunneis tomentosis; folia magna petiolata membranacea, 
petiolo crasso 1.5-2.5 cm. longo dense piloso; lamina oblongo-obovata 
usque anguste oblanceolato-oblonga 12-21 cm. longa 3-8 cm. lata, 
supra medium latissima, apicem versus plus minusve angustata, 
apice ipso obtuso usque acuto, basin versus late cuneato-angustata, 
basi ipsa obtusa vel anguste rotundata, margine basali utroque 
anguste recurvo, integra vel apicem versus remote serrata, supra 
viridis in sicco fusca primo sparse hirsuta glabrescens, sublucida, 
subtus glaucescens atque sordido-brunnescens, ubique tomento laxo 
non adpresso induta, costa nervisque brunneis atque tomentosis, 
nervis lateralibus utroque latere ca. 17 valde obliquis et adscenden- 
tibus fere rectis vel leviter curvis prominentibus, venis teneris 
manifestis; racemi numerosi elongati laxi paniculam amplam usque 
28 cm. longam efformantes, rhachi pedicellisque dense brunneo- 
stellato-tomentosis, pedicellis rectangule divaricatis 4-5 mm. longis 
gracilibus; calyx extus dense brunnescenti-tomentosus ca. 3 mm. 
longus, lobis ovalibus obtusissimis; petala calyce paullo longiora 
glabra, apice eroso-dentata et ciliata. Guatemala: Entre Rios, 
Dept. Izabal, July, 1927, Henry Kuylen 151 (Yale School of 
Forestry No. 10744; type in Herb. Field Mus.). British Honduras: 
Temash River, in secondary forest, altitude 30 meters, August, 
1935, William A. Schipp 1343. 

This has been reported from Guatemala as well as from British 
Honduras under the name Clethra lanata Mart. & Gal., a Mexican 
species, not definitely known to occur in Guatemala or British 
Honduras. In that the flowers are conspicuously larger and the 
leaves relatively broader and generally rounded or broadly rounded 
at the apex. 

Clethra licanioides Standl. & Steyerm., sp. nov. Arbor 9- 
metralis, ramulis crassis dense brunneo- tomentosis; folia modica 
breviter petiolata rigide coriacea, petiolo crasso 1-1.5 cm. longo 
dense brunneo-tomentoso; lamina rotundo-obovata 8-10 cm. longa 
5-7 cm. lata, apice latissime rotundata vel truncata et minute 
emarginata, basin versus paullo angustata, basi ipsa anguste rotun- 
data vel obtusa, supra sublucida in sicco sublutescens ubique pilis 
minutis vix perspicuis depresso-stellatis conspersa, costa nervisque 
manifestis sed non elevatis, subtus viridis ubique pilis majusculis 
sat dense velutine stellato-pilosa, nervis lateralibus utroque latere 



18 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. 23 

ca. 13 fere rectis angulo semirecto adscendentibus, venis prominulis; 
racemi usque 25 cm. longi laxiflori numerosi paniculam magnam 
latamque efformantes, rhachi dense brunneo-tomentosa, pedicellis ca. 
5 mm. longis divaricatis vel subadscendentibus, floribus saepius 
nutantibus; calyx 4-5 mm. longus dense stellate- tomentellus, seg- 
mentis late ovatis vel ovalibus obtusissimis; petala glabra magna 
sepalis paullo longiora apice laciniata et erosa. Guatemala: Dept. 
Jalapa, Potrero Carrillo, 13 miles northeast of Jalapa, altitude 1,500- 
1,700 meters, December 12, 1939, Julian A. Steyermark 33124 (type 
in Herb. Field Mus.). 

Local name, Zapotillo. The flowers are fragrant, the petals white, 
the sepals buff with a slight tinge of pink. The relationship of the 
Guatemalan tree is with C. lanata Mart. & Gal., which has smaller 
flowers and relatively narrower leaves. 

SOLANACEAE 

Athenaea physocalycia (Donn. Smith) Standl. & Steyerm., 
comb. nov. Brachistus physocalycius Donn. Smith, Bot. Gaz. 90: 
8. 1905. 

Athenaea viscida (Standl.) Standl. & Steyerm., comb. nov. 
Capsicum viscidum Standl. Carnegie Inst. Wash. Publ. 461: 84. 1935. 

Lycianthes cuspidata (Morton) Standl. & Steyerm., comb, 
nov. Solatium cuspidatum Morton in Lundell, Contr. Univ. Mich. 
Herb. 4: 25. 1940. 

Lycianthes hondurensis (Morton) Standl. & Steyerm., comb, 
nov. Solanum hondurense Morton in Lundell, Contr. Univ. Mich. 
Herb. 4: 26. 1940. 

Physalis campanula Standl. & Steyerm., sp. nov. Herba ut 
videtur perennis laxe ramosa procumbens, caulibus pilis longis viscid is 
albidis paten tibus dense villosis; folia longipetiolata, petiolo 1-4 cm. 
longo viscido-villoso; lamina late ovata 3-7.5 cm. longa 2-5 cm. lata, 
subacuta usque longiacuminata, basi late rotundata, integra vel 
undulata, interdum remote sinuato-dentata, supra viridis sparse 
breviter villosa, subtus concolor sparse breviterque villosa; pedicelli 
floriferi gracillimi 1.5-2 cm. longi dense viscido-villosi; calyx ad 
anthesin 1 cm. longus campanulatus dense pilis paten tibus viscido- 
villosus, basi subtruncatus, dentibus tubo lato paullo brevioribus 
triangularibus longe anguste acuminatis; corolla tubuloso-campanu- 
lata 18 mm. longa apice 8 mm. lata, extus breviter viscido-villosula, 
intus glabra, limbo remote obtuso-dentato; stamina prope basin 



STUDIES OF CENTRAL AMERICAN PLANTS III 19 

corollae inserta, filamentis filiformibus paullo inaequalibus, antheris 
paullo ultra 3 mm. longis; calyx fructifer late ovoideus immaturus 
2 cm. longus et 16 mm. latus, ut videtur teres et vix angulatus dense 
viscido-villosus, basi non depressus, apice abrupte contractus, lobis 
ca. 5 mm. longis fere subulatis. Guatemala: Dry banks along 
upper part of Quebrada Canjula, between Sibinal and Canjula, 
Volcan de Tacana, Dept. San Marcos, alt. 2,200-2,500 meters, 
February, 1940, Julian A. Steyermark 36067 (type in Herb. Field 
Mus.). 

The species is noteworthy for its narrowly campanulate corolla, 
slightly contracted at the apex and altogether unlike the corolla 
usual in this genus. The fruit, however, i.e. the fruiting calyx, is 
quite typical for the genus, and there is no good reason for attempting 
to refer the plant to some other group, which could be done on the 
basis of corolla form alone. 

Physalis carnosa Standl. & Steyerm., sp. nov. Annua prostrata 
dense ramosa fere glabra, caulibus crassis ca. 15 cm. longis carnosis 
subgeniculatis, novellis scaberulis; folia parva carnosa, petiolis crassis 
usque ad 15 mm. longis; lamina late ovata usque ovato-oblonga 
plerumque 1-2 cm. longa et 5-12 mm. lata, obtusa vel subacuta, 
basi cuneata vel obtusa, saepe valde inaequilateralis, primo minute 
scaberula, cito glabrata, nervis lateralibus utroque latere ca. 3 crassis 
subtus prominentibus; pedicelli floriferi 3-4 mm. longi minute 
puberuli, fructiferi vix longiores; calyx florifer 2.5 mm. longus 
obscure puberulus, dentibus anguste triangularibus acuminatis tubo 
paullo brevioribus; corolla ut videtur campanulata vix ultra 3 mm. 
longa; calyx fructifer ca. 12 mm. longus et 8 mm. latus late ovoideus 
basi non depressus glabratus arete reticulato-venosus, obtuse 
pentagonus, dentibus brevibus conniventibus triangularibus acutis. 
Guatemala: On sand dunes along the seashore, Ocos, Dept. San 
Marcos, March, 1940, Julian A. Steyermark 37766 (type in Herb. 
Field Mus.). 

In technical characters, particularly its small flowers and fruiting 
calyces, this evidently is close to P. Lagascae Roem. & Schult. and 
P. micrantha Link. Those, however, are normally erect or ascend- 
ing plants with delicate and very thin leaves. The leaves of P. 
carnosa as pressed are exceedingly irregular in outline, so much so 
that it is difficult to ascribe to them any normal leaf shape. 

Physalis lassa Standl. & Steyerm., sp. nov. Ut videtur vulgo 
perennis sed interdum annua, erecta vel procumbens vel decumbens, 



20 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. 23 

ramosa, caulibus dense pilis brevibus vel longiusculis eglandulosis 
patentibus pilosa vel subvillosa; folia petiolata, petiolo usque 2 cm. 
longo dense villosulo; lamina late ovata vel ovata 3-6 cm. longa 
2-4.5 cm. lata acuta vel interdum obtusa, basi late rotundata vel 
subcordata, supra dense pilis brevibus mollibus villosula, subtus 
pilis paullo longioribus pilosa vel interdum fere puberula; pedicelli 
floriferi ca. 5 mm. longi dense villosi, fructiferi usque ad 13 mm. longi; 
calyx florifer ca. 9 mm. longus dense albido-villosus, lobis tubo 
paullo longioribus anguste triangularibus acutis vel acuminatis; 
corolla late campanulata ca. 14 mm. longa, extus sparse villosula 
vel fere glabra; calyx fructifer 3-3.5 cm. longus 2 cm. latus dense 
villosulus vel breviter pilosus, basi vix depressus, obtuse pentagonus, 
dentibus ca. 8 mm. longis triangularibus acutis vel acuminatis; bacca 
fere 1 cm. diam. Guatemala: Dept. Jalapa, grassy thickets, between 
Jalapa and Montana Miramundo, alt. 1,500-2,000 meters, December, 
1939, Julian A. Steyermark 32868 (type in Herb. Field Mus.). 
Dept. Guatemala, Ignacio Aguilar 213. Sierra de las Minas, near 
San Geronimo, Dept. Baja Verapaz, 1,140 meters, W. A. Kellerman 
6656. Dept. Zacapa, grassy places, lower slopes of Sierra de las 
Minas, along trail above Rio Hondo, 250-900 meters, Steyermark 
29545. 

This species bears some relationship to the Mexican one that has 
been referred to P. peruviana L. That South American species, 
however, does not occur in Mexico or Central America, so far as 
the available specimens show. P. peruviana differs from the Guate- 
malan plant here described in its much broader and conspicuously 
cordate leaves and in its larger and relatively broader fruiting 
calyx. 

Solatium decurtatum Standl. & Steyerm., sp. nov. Frutex ut 
videtur omnino inermis, ramis sat gracilibus, vetustioribus ochraceis, 
novellis dense pilis stellatis ochraceis sessilibus vel breviter stipitatis 
aequaliter ramosis tomentosis; folia solitaria integra vel vix undulata 
membranacea, petiolo 1-2 cm. longo dense stellate- tomentoso; 
lamina elliptico-oblonga vel ovali-oblonga prope mediam latissima 
5-8 cm. longa 2-3.5 cm. lata apice rotundata vel obtusa, interdum 
breviter acutata, basi plus minusve inaequali obtusa vel subacuta 
abrupte in petiolum contracta, supra viridis sat dense pilis parvis 
aequalibus stellatis tactu asperulis induta, subtus grisea dense 
molliterque pilis intertextis stellato-tomentosa, nervis lateralibus 
utroque latere ca. 7; inflorescentia terminalis vel pseudolateralis 
cymosa, interdum densa atque umbelliformis 3 cm. tantum lata, 



STUDIES OF CENTRAL AMERICAN PLANTS III 21 

saepius dichotomo-ramosa et usque 6 cm. lata, multiflora, ramis 
plus minusve elongatis et secundifloris dense griseo-stellato-tomen- 
tosis, pedicellis fructiferis usque 8 mm. longis; calyx fere 3 mm. 
longus densissime stellato-tomentosus, dentibus triangularibus sub- 
acutis brevibus; corolla ut videtur alba extus dense stellato-pilosula 
ca. 7 mm. longa stellata, lobis angustis sensim attenuatis intus glabris; 
stamina distincta glabra, antheris fere 5 mm. longis oblongo-lineari- 
bus sursum vix angustatis; bacca glabra globosa lucida 5-6 mm. 
diam. Guatemala: Lago de Yaxha, Pete"n, March, 1933, C. L. 
Lundell 2012 (type in Herb. Field Mus.). British Honduras: 
Corozal District, 1931-32, P. H. Gentle 121, 253. 

A relative of S. racemosum Jacq. of the West Indies, which has 
usually much longer, mostly acute or acuminate leaves and anthers 
7-9 mm. long. 

RUBIACEAE 

Borreria vegeta Standl. & Steyerm., sp. nov. Herba annua 
erecta 30-60 cm. alta et ultra simplex vel pauciramosa, caulibus 
crassis subteretibus sparse laxeque albido-pilosulis vel glabratis; 
stipularum vagina laxa 5 mm. longa, setis paucis erectis aequilongis 
onusta laxe pilosa; folia herbacea, interdum usque 1 cm. longe 
petiolata, petiolo lato marginato; lamina lanceolato-oblonga usque 
ovata vel oblongo-elliptica 3.5-7.5 cm. longa 1.2-2.8 cm. lata atten- 
uato-acuminata, basi cuneatim contracta, supra sparse scabra vel 
glabrata tactu aspera, costa nervisque subimpressis, subtus pallidior 
ad costam nervosque scabra vel hispidula, nervis lateralibus 6-7 
valde obliquis prominentibus; capitula plerumque terminalia, in- 
terdum quoque ex axillis superioribus nascentia 2-2.5 cm. lata dense 
multiflora, floribus breviter pedicellatis; bracteae capitulorum 
terminalium foliis similes et aequimagnae, vulgo 4; hypanthium 
oblongum saltern superne villosulum ; sepala 4 ovalia usque suborbic- 
ularia vel rotundato-obovata viridia apice rotundata dense pectinato- 
ciliata glabra vel glabrata; corolla alba ca. 2.5 mm. longa extus 
glabra, lobis ovatis acutiusculis; antherae bene exsertae; capsula 
ovalis vel late oblonga 3 mm. longa superne villosula vel glabra 
membranacea calyce persistente coronata; semina teretia 2 mm. 
longa fusco-ferruginea profunde transverso-rugosa. Guatemala: 
Dept. Jutiapa, between Jutiapa and La Burrera, northeast of Jutiapa, 
alt. 800 meters, November, 1940, in damp thicket, Standley 76007 
(type in Herb. Field Mus.) . Vicinity of Jutiapa, 850 meters, Standley 
75041. Near El Molino (Dept. Santa Rosa), Dept. Jutiapa, 600 
meters, wet thicket, Standley 78447. Dept. Santa Rosa, along the 



22 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. 23 

Avellana road south of Guazacapan, 150 meters, weedy field, 
Standley 79475. 

Because of the transversely rugose seeds as well as habit and 
general appearance, it is obvious that this plant is related to B. laevis 
(Lam.) Griseb. That, however, is a less stout plant, usually decum- 
bent or procumbent, with conspicuously smaller flower heads and 
narrow, usually much smaller sepals. 

Bouvardia Pachecoana Standl. & Steyerm., sp. nov. Frutex 
metralis glaber; vagina stipularis ca. 4 mm. alta setis paucis 2-2.5 
mm. longis aucta; folia opposita membranacea, petiolo 4-8 mm. 
longo; lamina ovata vel oblongo-ovata 5-10 cm. longa 2.2-4 cm. 
lata acuta vel acuminata, basi obtusa vel acuta et interdum breviter 
decurrens, utrinque in statu sicco pallida, nervis lateralibus utroque 
latere vulgo 3 prominulis, margine adpresso-ciliato; inflorescentia 
terminalis cymoso-corymbosa dense multiflora, bracteis pro parte 
foliaceis, pedicellis usque 6 mm. longis; hypanthium obovoideum 
1.5 mm. longum basi obtusum; sepala ca. 3 mm. longa erecta tri- 
angulari-linearia attenuata viridia; corolla salmoneo-coccinea, tubo 
16-18 mm. longo extus glabro sursum sensim dilatato ad faucem 
usque 3 mm. lato, lobis suberectis ovatis vel oblongo-ovatis ca. 
5 mm. longis obtusis; stylus et stamina inclusa. Guatemala: Dept. 
San Marcos, in a wet, densely forested quebrada, Barranco Emi- 
nencia, along the road between San Marcos and San Rafael Pie 
de la Cuesta, in upper part of the barranco between Finca La Lucha 
and Buena Vista, alt. 2,500-2,700 meters, February, 1941, Paul C. 
Standley 86226 (type in Herb. Field Mus.). 

A well-marked species, not very closely related to any other of 
Guatemala or southern Mexico. From B. dictyoneura Standl. it 
differs in its obviously petiolate leaves, acute at the base or contracted 
and decurrent, and not reticulate- veined. The plant is a particularly 
handsome one because of its abundance of bright salmon-red flowers. 
It is named for Don Mariano Pacheco Herrarte, Director General 
de Agricultura of Guatemala, to whom we are indebted for many 
favors. 

Crusea setosa (Mart. & Gal.) Standl. & Steyerm., comb. nov. 
Borreria setosa Mart. & Gal. Bull. Acad. Brux. 11, pt. 1: 131. 1844. 
Spermacoce setosa Hemsl. Biol. Centr. Amer. Bot. 2: 60. 1881. 
Crusea cruciata Wats. Proc. Amer. Acad. 25: 152. 1890. B. chiapensis 
Brandeg. Univ. Calif. Publ. Bot. 10: 417. 1924. While no specimen 
of Galeotti 2627, type of Borreria setosa, has been seen, there is in 
the Herbarium of Field Museum an excellent photograph of a 



STUDIES OF CENTRAL AMERICAN PLANTS III 23 

specimen of this number from the Paris herbarium. This, in associa- 
tion with the original description, shows clearly that the species 
represented is the same as the one that has passed as Crusea cruciata 
Wats., a plant of wide distribution in Mexico and Central America. 

Hillia macrocarpa Standl. & Steyerm., sp. nov. Frutex epi- 
phyticus omnino glaber, ramis crassis ochraceis; folia in sicco coriacea, 
petiolo crasso ca. 4-7 mm. longo; lamina elliptico-oblonga vel 
oblanceolato-oblonga 6-8.5 cm. longa 2-3.5 cm. lata, acuta vel 
subacuminata, basi cuneato-angustata, prope vel paullo supra 
mediam latissima, supra plana, nervis subtus obscuris planis, laterali- 
bus paucis angulo angustissimo adscendentibus; capsula breviter 
crasse pedicellata anguste cylindracea 8-9 cm. longa, medio fere 
1 cm. crassa, apice breviter angustata, basin versus longe sensimque 
angustata. Guatemala: Dept. Quezaltenango, lower south-facing 
slopes of Volcan de Santa Maria, between Santa Maria de Jesus 
and Calahuache", along the great barranco between Finca Pirineos 
and Patzulin, alt. 1,300-1,500 meters, January, 1940, Julian A. 
Steyermark 33667 (type in Herb. Field Mus.). 

Local name Jazmin. Leaves fleshy, coriaceous, rich grass-green 
above, paler beneath, with whitish green at base in the center; 
capsule pale green. Growing on a ridge in a cafetal. The relation- 
ship is with Hillia loranthoides Standl. of Costa Rica, which has 
capsules less than half as long. 

Psychotria Aguilarii Standl. & Steyerm., sp. nov. Frutex 
1-1.5 m. altus ramosus, ramis gracilibus, novellis glabris; stipulae 
caducae ca. 1 cm. longae membranaceae ferrugineae glabrae, primo 
folia calyptratim involventes, serius fissae; folia membranacea, 
petiolo 5-12 mm. longo glabro fere ad basin marginato; lamina 
oblanceolata vel oblongo-oblanceolata 8-12 cm. longa 2-3.5 cm. 
lata longe angusteque attenuato-acuminata, basin versus longe 
anguste attenuata et longe decurrens, supra viridis glabra, nervis 
manifestis sed non elevatis, subtus pallidior glabra sed in axillis 
domatiatis nervorum sparse breviter barbata, nervis lateralibus 
pallidis utroque latere ca. 11 angulo semirecto vel paullo latiore 
adscendentibus, ad costam interdum sparse hirsuta; inflorescentia 
terminalis sessilis laxa pauciflora usque 4.5 cm. longa e basi pauci- 
radiata, ramis glabris, bracteis parvis caducis, floribus ut videtur 
fere omnibus sessilibus dense ad apices ramulorum aggregatis; 
calyx cum hypanthio vix ultra 1 mm. longus glaber truncatus et 
remote obscure dentatus hypanthio obovoideo-conico paullo brevior; 
corolla alba extus glabra infundibuliformis 5 mm. longa fauce non 



24 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. 23 

barbata, lobis 1.5 mm. longis obtusis ovato-ovalibus suberectis 
intus glabris; fructus intense ruber globosus 6 mm. diam., pyrenis 
dorso grosse granulatis ecostatis. Guatemala: Dept. Chimaltenango: 
Damp wooded barranco along the road between Chimaltenango 
and San Martin Jilotepeque, alt. 1,500-1,700 meters, December, 
1940, Paul C. Standley 80900 (type in Herb. Field Mus.). Dept. 
Sacatepe"quez: Near Barranco Hondo, southeast of Alotenango, 
1,000-1,250 meters, Standley 65024. Dept. Guatemala: Without 
locality, in 1939, Jose Ignacio Aguilar 215. Near Finca La Aurora, 
1,500 meters, Aguilar 126. 

The species is related to P. nervosa Swartz, to which it bears much 
superficial resemblance, but in that the fruits are conspicuously 
costate and longer than thick. In that species, too, there is usually 
ample pubescence on some parts of the plant. 

Psychotria erecta (Aubl.) Standl. & Steyerm., comb, nov. 
Ronabea latifolia Aubl. PI. Guian. 134. pi. 59. 1775, not Psychotria 
latifolia Humb. & Bonpl. 1819. R. erecta Aubl. op. cit. 156. 1775. 
P. axillaris Willd. Sp. PI. 1: 962. 1798. The genus Ronabea is 
maintained as distinct by Bremekamp in the Flora of Surinam, a 
treatment that has much justification, but on the whole it seems 
more practical to leave the single species in Psychotria where most 
authors have been content to place it. 

Psychotria Schippii Standl. & Steyerm., sp. nov. Subgenus 
Mapouria. Frutex vel arbor saepe 5-9-metralis, trunco interdum 
5-10 cm. diam., ramulis subteretibus glabris viridescentibus vel 
brunnescentibus interdum lenticellis magnis elongatis conspersis; 
stipulae caducae usque 1.5 cm. longae attenuatae glabrae firmae; 
folia majuscula breviter petiolata crasse membranacea vel sub- 
coriacea, petiolo crasso 1-2.5 cm. longo, saepe fere ad basin margi- 
nato; lamina elliptica vel oblongo-elliptica 11-19 cm. longa 5-9.5 
cm. lata abrupte acuminata vel caudato-acuminata, basi acuta 
vel subito contracta et longe decurrens, supra in sicco lucida glabra, 
subtus paullo pallidior glabra sed in axillis nervorum saepius breviter 
sparseque barbata, nervis lateralibus utroque latere ca. 14 promi- 
nentibus angulo lato adscendentibus arcuatis; inflorescentia termi- 
nalis sessilis cymoso-paniculata copiose ramosa in statu fructifero 
plus minusve laxa multiflora, ca. 6 cm. longa et 8 cm. lata, ramis 
basalibus 3-4 crassiusculis ferrugineis glabris, bracteis caducis, 
floribus sessilibus; fructus ruber globosus glaber 4-5 mm. diam. basi 
et apice rotundatus, pyrenis dorso obtuse costatis; calyx ad apicem 
fructus persistens breviter dentatus, dentibus obtusis vel rotundatis 



STUDIES OF CENTRAL AMERICAN PLANTS III 25 

minutis. British Honduras: In advanced forest, limestone valley, 
Valentin, El Cayo District. June-July, 1936, C. L. Lundell 6193 
(type in Herb. Field Mus.). Columbia-Toledo, in 1927, G. H. 
Donald 2. In forest, Guatemalan boundary, 630 meters, occasional, 
Schipp S640. Guatemala: Uaxactun, April, 1931, Bartlett 12534. 

In most of its characters Psychotria Schippii approaches the 
common and widespread P. nervosa Swartz (P. undata Jacq.), 
but in that the leaves have much fewer nerves and the fruits are 
oval or ellipsoid, and evidently longer than broad. 

Randia habrophlebia Standl. & Steyerm., sp. nov. Frutex 
2-3-metralis, ramis crassis, lateralibus brevibus crassis late divergen- 
tibus, foliis ad apices ramulorum dense aggregatis; stipulae brunneae 
glumaceae extus strigosae, intus dense sericeae; folia breviter 
petiolata herbacea, petiolo crasso 6-15 mm. longo densissime pilis 
longis ochraceis subadpressis piloso; lamina suborbicularis usque 
rotundato-ovata vel late elliptica 6.5-9.5 cm. longa 5.5-7.5 cm. 
lata, apice late rotundata usque obtusa, basi late rotundata vel 
obtusa, supra ubique densissime velutino-pilosa, ob nervos venasque 
plus minusve impressas bullata, subtus grisea vel ochracea ubique 
dense molliter tomentosa, nervis lateralibus utroque latere ca. 9 
angulo acutissimo adscendentibus, venulis nervisque omnibus in- 
signiter prominentibus et reticulatis; bacca terminalis solitaria 
sessilis globosa 3.5 cm. diam., fere laevis, ecostata, sat dense pilis 
subadpressis pilosa; semina compressa numerosissima. Guatemala: 
Dept. Jutiapa, in thicket along river, vicinity of Jutiapa, alt. 850 
meters, October-November, 1940, Paul C. Standley 76321 (type 
in Herb. Field Mus.). 

Closely related to R. monantha Benth., of the same region, but 
in that the leaves at maturity are hirsute or pilose with straight, 
not at all matted hairs; the leaves of the type specimen of R. habro- 
phlebia are very old, yet still densely tomentose beneath with matted 
hairs. The venation, too, is unlike that shown in any specimens 
of R. monantha. It may be expected confidently that flowering 
specimens of R. habrophlebia will afford other characters for separat- 
ing the two species. The type specimen is almost destitute of spines, 
but it is assumed that normally the spines are in 4's at the ends of 
the branches, as in related species of the subgenus Basanacantha. 

Rondeletia brachistantha Standl. & Steyerm., sp. nov. 
Arbor, ramulis gracilibus sed rigidis teretibus, novellis pilis adpressis 
fulvidis sparse pilosis; stipulae ca. 14 mm. longae reflexae brunneae 
oblongo-deltoideae obtusae, extus strigosae; folia subcoriacea, petiolo 



26 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. 23 

usque 4 mm. longo; lamina ovata vel ovato-oblonga vel elliptico- 
oblonga 5-8 cm. longa 2.5-3.5 cm. lata acuta vel subacuminata, apice 
ipso obtuso, basi rotundata vel anguste rotundata, glabra vel subtus 
secus nervos sparse hirtella, subtus paullo pallidior, nervis lateralibus 
utroque latere ca. 5 prominentibus pallidis angulo semirecto adscen- 
dentibus; inflorescentia terminalis cymoso-corymbosa dense multi- 
flora 2-5 cm. longe pedunculata 3-6 cm. longa 4-9.5 cm. lata, e basi 
triradiata, ramis dense fulvido-strigosis, bracteis minutis, floribus 
sessilibus vel subsessilibus; hypanthium globosum 1.5 mm. altum 
dense minute adpresso-hispidulum et primo paullo tomentosum, 
calyce 0.7 mm. alto, dentibus minutis remotis obtusis; corolla rosea 
extus ubique dense minuteque strigillosa, tubo 4-5 mm. longo 
sursum paullo dilatato fauce dense luteo-barbato, lobis late rotundatis 
vix ultra 1.5 mm. longis patulis intus puberulis; stylus glaber exsertus, 
antheris inclusis; capsula globosa 4^4.5 mm. lata basi rotundata 
glabrata loculicide dehiscens; semina 0.7 mm. lata subcompressa 
fusco-brunnea puncticulata. Guatemala: Dept. San Marcos, dry 
upper slopes, Rio Vega, near San Rafael and Guatemala-Mexico 
boundary, Volcan de Tacana, alt. 2,500-3,000 meters, February, 
1940, Julian A. Steyermark 36286 (type in Herb. Field Mus.). 

Differing from R. cordata Benth. chiefly in the very small corollas, 
those of that species being almost twice as large. Further material 
will be necessary to decide whether the plant here described can be 
maintained as a distinct species. 

Rondeletia Cordovana Standl. & Steyerm., sp. nov. Arbuscula 
fere glabra, ramulis subteretibus, novellis sparse minute strigillosis; 
stipulae e basi triangulari subulatae ca. 3 mm. longae erectae; folia 
parva membranacea, petiolo gracili 5-10 mm. longo sparse minuteque 
strigilloso vel fere glabro; lamina lanceolato-oblonga 5.5-7.5 cm. 
longa 1.7-2.5 cm. lata longissime attenuato-acuminata, basi acuta, 
supra ad costam prominentem sparse minute pilosula vel omnino 
glabra, nervis non elevatis, subtus pallidior, in axillis nervorum 
barbata, aliter glabra, nervis lateralibus utroque latere ca. 6 arcuatis 
angulo lato adscendentibus; inflorescentia terminalis 1.5 cm. longe 
pedunculata erecta cymoso-corymbosa pauciflora ca. 3 cm. alta et 
4.5 cm. lata basi trichotoma, floribus ad apices ramorum primariorum 
dense cymoso-aggregatis sessilibus vel usque 3 mm. longe pedicellatis, 
bracteis inferioribus foliaceis foliis conformibus sed parvis, usque 
2 cm. longis, superioribus subulatis minutis; hypanthium obovoideum 
1.5-2 mm. longum dense minute pallido-strigillosum; calyx maxime 
inaequaliter 4-lobus, lobis 3 linearibus vel lineari-subulatis ca. 



STUDIES OF CENTRAL AMERICAN PLANTS III 27 

3 mm. longis, quarto lanceolato-oblongo 5-6 mm. longo obtuso, 
omnibus sparse strigillosis vel fere glabris; corolla in alabastro apice 
obtusissima extus dense minuteque strigillosa. Guatemala: Dept. 
Zacapa, cloud forest in ravine bordering Quebrada Alejandria, 
summit of Sierra de las Minas, vicinity of Finca Alejandria, alt. 
2,500 meters, October, 1939, Julian A. Steyermark 29906 (type in 
Herb. Field Mus.). 

The most closely related species is R. aetheocalymna Donn. Smith, 
of Alta Verapaz, in which the much larger leaves are oval, and the 
small calyx lobes are oval. The present species is dedicated to 
Don Alejandro Cordova, distinguished journalist of Guatemala, and 
proprietor of Finca Alejandria, where the junior author was a guest 
when the type material was collected. 

COMPOSITAE 

Liabum tajumulcense Standl. & Steyerm., sp. nov. Frutex 
4.5-5 m. altus, ramulis arachnoideo-tomentosis; folia non visa; 
capitula discoidea in paniculas multifloras contractas thyrsoideas 
disposita, ramis dense ochraceo-tomentosis; bracteae ovatae vel 
lanceolatae 4-6 mm. longae extus dense lanuginosae intus glabrae, 
pedicellis dense tomentosis; involucrum campanulatum 4-seriatum 
14-16 mm. altum, 17-20 mm. latum, bracteis 5-13 mm. longis 
gradatis ovato-lanceolatis usque lineari-lanceolatis acuminatis, extus 
ochraceo-lanuginosis; discus luteus 1.5-2 cm. altus 1.5-2 cm. latus; 
corollae 12-13 mm. longae; achaenia immatura 5-costata compressa 

4 mm. longa 1.5 mm. lata, dense sericeo-hirsutula; pappi setae in- 
aequales, interiores 35-40 corollam fere aequantes 10-11 mm. 
longae, exterioribus brevioribus. Guatemala: Dept. San Marcos: 
Moist thicket bordering stream, barrancos southwest of Tajumulco, 
northwestern slopes of Volcan de Tajumulco, alt. 2,300-2,500 meters, 
February, 1940, Julian A. Steyermark 36543 (type in Herb. Field 
Mus.). 

Apparently related to L. Deamii Rob. & Bartl., but differing in 
its much larger heads and flowers; distinguished from L. Klattii Rob. 
& Greenm. by the densely lanuginose and more numerous involucral 
bracts and broader heads. 

Stevia vulcanicola Standl. & Steyerm., sp. nov. Frutex 2-3- 
metralis, caulibus glutinosis; folia opposita petiolata elliptico-ovata 
usque ovata viscido-glutinosa pinnatinervia, 15-30 cm. longa 7-12 
cm. lata, arete crenato-dentata, supra puberula, acuta vel acuminata, 
basi abrupte cuneatim contracta, petiolo anguste alato 2-9 cm. longo; 



28 FIELD MUSEUM OF NATURAL HISTORYBOTANY, VOL. 23 

inflorescentia corymbosa terminalis dense fastigiato-ramosa, ramis 
glabratis vel villosis; capitula 11-14 mm. alta sessilia vel breviter 
pedicellata; involucrum pallide viride, bracteis linearibus acuminatis 
vel cuspidatis sparse dorso hispidulis; corolla rosea vel pallide lilacina 
6.5-7 mm. longa glandulosa; achaenia linearia ad angulos sparse 
hispidula fuscescentia 5.5-7 mm. longa, corona brevi acute dentata; 
setae nullae. Guatemala: Dept. Quezaltenango: Pine-fir forest, 
Volcan de Santo Tomas, alt. 2,500-3,700 meters, January, 1940, 
Julian A. Steyermark 34757 (type in Herb. Field Mus.); also numer- 
ous other collections from the departments of Quezaltenango and 
San Marcos. 

Similar to S. polycephala Bertol., but differing in its larger broader 
leaves, more contracted at the base, the margins with more salient 
and regular serrations. 



UNIVERSITY OP n-un = 




3 01 12 049897595