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56 FIELDIANA: BOTANY, VOLUME 28 facing shoulder, Ptari-tepui^ state of Bolivar, alt. 2200 m., November 2, 1944, Julian A. Steyermark 59781. So far as vegetative habit is concerned, this is the most distinctive species in the genus. It is most closely allied with E. angusta N. E. Brown and . gracilis Gilly, two species known only from Mount Roraima. Lagenocarpus bifidus Gilly, sp. nov. Caulis ignotus; folia lanceolato-linearia plana glabra glauca rigido-coriacea ad 9 dm. longa, ad basim 2 cm. lata et ad medium 1-1.3 cm. lata, marginibus antrorse hispido-serratis; culmi floriferi triangulares glabri, cum inflorescentia ad 1.2 m. alti; inflores cent ia interrupta e paniculis secundariis pluribus composita; spiculae masculae ad 2.8 mm. longae in paniculis inferioribus laxe aggregatis, glumis vacuis 4-6, lanceolatis acutis vel mucronatis glabris, glumis staminibus 4-8, lanceolatis vel oblongolanceolatis subacutis vel erosis ad apicem; spiculae foemineae uniflorae ad 4.5 mm. longae paucae in paniculis superioribus rigidioribus congestae, glumis 6-8, ovatis vel orbiculato-ovatis bifidis et aristatis ad apicem, aristae ad 1.5 mm. longae hispidae; achaenium rubro-brunneum ovoideum glabrum lucidum et subrugosum tricostatum, cum rostro conico 3.5 mm. longum; rostro quam corpore achaenii subaequantes; squamellae hypogynae deltoideae minute ciliolatae ad 0.2 mm. longae; stylo trifido. Type in herb. Chi. Nat. Hist. Mus., isotype in herb. Iowa State College, collected on Gran Sabana, between Divina Pastora on Rio Kukena'n and Santa Elena, south of Mount Roraima, state of Bolivar, ak. 915-1005 m., October 3, 1944, Julian A. Steyermark 59302. Resembles L. diffusus Gilly in the bifid and aristate pistillate glumes, but near L. tremulus Nees in characters of the achenes. Lagenocarpus diffusus Gilly, sp. nov. Caulis brevis lignosus ad 2 cm. diam., vaginis persistentibus laceratis tecta; folia grisea lanceolato-linearia plana glabra rigidocoriacea acuta, ad 9.5 dm. longa, ad basim 1.8 cm. lata et ad medium 1 cm. lata, marginibus antrorse hispido-serratis; culmi floriferi robusti glabri, cum inflorescentia ad 1.4 dm. alti; inflorescentia interrupta e paniculis secundariis pluribus composita; spiculae masculae ad 3.5 mm. longae numerosae in paniculis inferioribus laxe diffusis aggregatis, glumis vacuis 3-5, lanceolatis vel oblongolanceolatis minute bifidis ad apicem mucronatis vel mucronulatis ciliolatis, glumis staminibus 4-8, lanceolatis acutis erosis et ciliolatis; antherae 1.7 mm. longae; spiculae foemineae uniflorae ad 3.5 mm. longae, paucae in paniculis superioribus rigidioribus confertis, glumis 4-6 ciliolatis ovatis vel orbiculato-ovatis, ad apicem bifidis et aristatis, aristis ad 1.5 mm. longis; achaenium glabrum laeve conico-ellipsoideum trisulcatum ad basim, cum rostro laevi truncate
BOTANICAL EXPLORATION IN VENEZUELA - I 57 ad 2.5 ram. longum et ad 1.5 mm. diam.; squamellae hypogynae triangulares, ad 0.5 mm. longae, marginibus laevibus nee ciliolatis; stylo crifido. Type in herb. Chi. Nat. Hist. Mus., isotype in herb. Iowa State College, collected on summit of Cerro Duida, Savanna Hills, Territorio Federal Amazonas, alt. 1025-1200 m., September 2, 1944, Julian A. Steyermark 58218. Allied to L. Spruce* H. Pfeiffer and L. guianensis Nees, but differing from them in the bifid and aristate glumes and in the characters of the achene. Lagenocarpus glomerulatus Gilly, sp. nov. Subcaespitosa,caulibus brevibus, vaginis persistentibus reticulatofibratis tecta; folia 6.5 dm. longa et ad 7 mm. lata linearia plana vel bicarinata ad apicem glabra vel hispidulosa; culmi floriferi triangulari glabri, cum inflorescentia ad 6 dm. alti; inflorescentia interrupta, bracteae paniculis secundarius subtendentes cum vaginae breves et laminae vaginorum 10- a 30-plo longioribus; spiculae masculae 2.5 mm. longae glomerulatae, 7-15 aggregatae conjunctim in paniculis inferioribus laxe confertae, glumis vacuis 2-4, ovatis vel lanceolatoovatis mucronatis glabris, margine ciliolatis exceptis, glumis staminibus 6-15, lanceolatis vel lineato-lanceolatis acutis vel erosis et ciliolatis ad apicem; antherae ad 1.2 mm. longae; spiculae foemineae uniflorae ad 3.5 mm. longae, solitariae vel geminae in paniculis superioribus paucifloris rigidis in struct is, glumis 5-8, ovatis oblongoovatis vel late ellipticis ciliolatis truncatis vel minute bifidis et mucronatis ad apicem; achaenium late ellipsoideum subteretium rubro-brunneum vadose trisulcatum subrugulosum et alveolarum, 2 mm. diara. et cum rostro laevi stramineo 3.5 mm. longum; rostro minute pubescente ad apicem, quam corpore achaenii 3-plo brevioribus; squamellae hypogynae late orbiculares vel quadrangulares ad 0.5 mm. longae ciliolatae et albo-pilosae; cilii quam squamellae subaequantes; stylo trifido, stigmata rosea vel rubro-brunnea. Type in herb. Chi. Nat. Hist. Mus., isotype in herb. Iowa State College, collected on rocks along Rio Karuai between Santa Teresita de Kavanayen and base of Ptari-tepuf, state of Bolivar, alt. 1220 m., November 18, 1944, Julian A. Steyermark 60340. A very distinctive species apparently related, at least in the characters of the achene and the staminate spikelets, to L. rigidus Nees of eastern Brazil, but differing markedly from that species in foliage and type of inflorescence. Lagenocarpus sabanensis Gilly, sp. nov. Subcaespitosa, caulibus brevibus lignosis, vaginis persistentibus laceratis tecta; folia linearia plana ad 4 dm. longa et 5 mm. lata, dense minute pubescentia supra et infra, marginibus minute hispiduloscabratis; culmi floriferi canaliculati dense adpresso-villosuli, cum
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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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