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160 FIELDIANA: BOTANY, VOLUME 28 crest of cerro between east and west end, Sororopan-tepui, state of Bolivar, alt. 2255 m., November 14, 1944, Julian A. Steyermark 60124 (staminate plant); same locality Steyermark 60143 (pistillate plant), co-type. By having the seeds winged all around, this species would fall into subgenus Eudioscorea, according to R. Knuth's treatment of the genus in "Das Pflanzenreich". It is characterized by the 3 short fertile stamens without staminodia in the staminate flowers, the broadly suborbicular, rounded or obtuse staminate perianth segments, the fasciculate, sessile staminate flowers, the capsule as broad as or slightly broader than long, and the relatively small, broadly ovate, heart-shaped leaves with a conspicuous reticulum of nerves beneath. It may be considered a member of the sect. Hemidematostemon Griseb., the known species of which are all Brazilian, but does not agree with any of the described species of that section. IRIDACEAE Trimezia Fosteriana Steyermark, sp. nov. Herba perennis, ex cormum oriunda; scapo erecto subcomplanato simplici glabro, 60-75 cm. alto, bi- vel tri-foliato, bracteis subfoliosis remotis, 5 - 13 cm. longis; foliis radicalibus elongatis erectis glauco-viridibus subcoriaceis conspicue striatis linearibus, 30-65 cm. longis, 5-8 mm. latis, apice obtusis et asymmetric is; spatha terminali sessili 1-3-flora bivalva; valvis inaequalibus pedicellum subaequantibus striatis late lanceolatis carinatis 3.5-4.5 cm. longis, 8-10 mm. latis, acutis vel acuminatis, exteriore interiorera basi amplectenti; floribus aureo-purpureo-maculatis; perigonii laciniis 2.5 cm. longis, exterioribus patentibus, interioribus minoribus sursum arcuatis; stylo 13 mm. longo trigono tripartite, laciniis triangulatis aureo-flavidis 4 mm. longis, uno angulo ad duas margines late alato; stigmatibus bifidis lobatis vel crenatis, dentibus obtusis; staminibus styli ramulis oppositis et adnatis; filamentis liberis aureo-flavidis 4 mm. longis; antheris 6 mm. longis, apice apiculatis, juxta longitudinem dehiscentes; ovulis in loculis plurimis. Type in herb. Chi. Nat. Hist. Mus., collected along Rio Tek- Yunsen, between Santa Teresita de Kavanaye'n and Carrao-tepui^ state of Bolivar, alt. 1375 m., December 4, 1944, Julian A. Steyermark 60834; sandy wet ground with Stegolepis and Brocchinia, Gran Sabana, between Mission of Santa Teresita de Kavanayen northwest to Rio Karuai, on large mesa, state of Bolivar, alt. 1220 m., October 26, 1944, Steyermark 59364. This species is named in honor of Dr. Robert C. Foster of the Gray Herbarium of Harvard <strong>University</strong>. His studies of tropical American Iridaceae in recent years have done much to further our taxonomic knowledge of this family.
BOTANICAL EXPLORATION IN VENEZUELA - I 161 The long basal, closely ribbed, narrow leaves, foliose flowering scapes, and yellow perianth segments, of which the inner ones are spotted purple, distinguish this species. According to Dr. Foster, who has examined my material, "this species represents a transition between the rather broad, flat, thin leaves of T. martinicensis (Jacq.) Herb, and its allies, and the rigid, terete, thick leaves of the Lans- 6erg*o-group, exemplified by T. juncifolia (Klatt) Benth. & Hook." MUSACEAE Heliconia Schneeana Steyermark, sp. nov. Planta 3 m. alta; foliorum laminis utrinque pallido-viridibus anguste oblongis, apice subito acuminatis; inflorescentia in scapo aphyllo foliorum vaginis inferne abscondito terminal!, erecta; rhachidi inflorescentiae conspicua, flexuosa; rhachidis internodiis 3-6 cm. longis, in sitfco 4-5 mm. crassis, dense brunneo-villosulis; bracteis spathaceis rubris 8, e longato-lanceolatis, e basi latioribus, apice acutis 12-19 cm. longis, 1-1.5 cm. latis, reclinatis vel reflexis, dorso inferne praesertim tomentosis; bractea infima fertili elongata, 38 cm. longa, lamina parva instructa; floribus in axillis spatharum, fasciculatis perpluribus pedicellatis ovario longioribus; bracteis membranaceis lanceolatis acuminatis, 4.5-5 cm. longis, 1-1.3 cm. latis, glabris; pedicellis flavidis 1.5-3 cm. longis, dense brunneovillosulis; tepalis 4-4.5 cm. longis, glabris, basi viridescentiflavidis superne pallido-viridibus; filamentis pallid o-f la vid is; ovario basi flavido, superne viridi. Type in herb. Chi. Nat. Hist. Mus., collected in forest above Hacienda Agua Blanca, above La Azulita, state of Merida, alt. 1310- 1340 m., April 25, 1944, Julian A. Steyermark 56083 (3 sheets), "stems 10 feet tall; flowers among upper leafy shoot pan; bracts pointing downward, deep red; pedicel yellow; ovary yellow at base, green in upper half; filaments pale yellow; leaves pale dull green both sides." This species is characterized by the strongly reflexed or downward-pointing, narrowly elongated linear-lanceolate bracts of the inflorescence, the flexuose densely villosulous rachis, the densely villosulous pedicels, and the erect inflorescence. It is named in honor of Dr. Ludvig Schnee of Caracas, who', for many years, has studied and published on various groups of Venezuelan monocotyledons. MARANTACEAE Calathea acuminate Steyermark, sp. nov. Planta 35-40 cm. alta; foliis ad 18 cm. longe petiolatis, petioli parte superiore ad 4-5 mm. longa tereti callosa supra minutissime
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o 2 CM XI E> RAR.Y OF THL UNIVERSIT
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FIELDIANA: BOTANY A Continuation of
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NUMBER 1 LIST OF ILLUSTRATIONS TEXT
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PAGE 67. Emmotum ptarianum 342 68.
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CONTRIBUTIONS TO THE FLORA OF VENEZ
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BOTANICAL EXPLORATION IN VENEZUELA
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