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52 FIELDIANA: BOTANY, VOLUME 28 Tribe SCLERIAE Scleria tepuiensis Core, sp. nov. 7 Rhizomate ligneo, squamis atro-rubris intecto; culmo 1-2 m. alto, triquetro; foliis 30 era. longis, 5-12 ram. latis, glabris, rigidis, costa subtus et margintbus scabris; vaginis glabris, triquetris; ligula abbreviata, rotundata; paniculis 5-15 cm. longis, purpurascentibus, densis; bracteis foliaceis; spiculis masculis longe pedicellatis, numerosis; spiculis foemineis paucis, in ramorum basi subsessilibus; squamis masculis anguste mucronatis; squamis foemineis lanceolatis; hypogynio sine lob is; achaenio albo, 2-3 mm. longo, hirtello, obtuse trigono. Scleriae cyperinae proxime affinis. Rhizome thick, hard, nodose; culms slender, shining, the angles smooth or somewhat roughened; leaves chartaceous, scabrous on the margins and main veins beneath; sheaths smooth or somewhat roughened on the angles, wingless or very narrowly winged; ligule rotundtriangular, with a thin, scarious margin (not appendaged); panicles terminal, single, or with additional smaller ones in the upper axils, ovate to ovate-rotund, dense, much-branched, brown-purple, rachis scabrous, the branches short, divergent; bracts about 3, exceeding the inflorescence; bractlets linear-setaceous; staminate spikelets numerous, linear, 5-6 mm. long, on slender peduncles 5-6 mm. long; pistillate spikelets solitary at the bases of the branches; staminate scales narrow, purplish; pistillate scales glabrous, purplish; hypogynium rigid, wrinkled, white, the lobes none or very obscure; achene white or sometimes purplish-tinged. Type in herb. Chi. Nat. Hist. Mus., isotype in herb. West Virginia <strong>University</strong>, collected on summit of Cerro Duida, Savanna Hills, Territorio Federal Amazonas, alt. 1025-1200 m., September 2, 1944, Julian A. Steyermarh 58232. Also collected in same locality, Tate 738 (NY). BRITISH GUIANA: Paulo, near Mt. Roraima, alt. 4000 Tate 152 (NY). ft., This species is closely related to S. cyperina, to which the Tate specimens had been doubtfully referred. It differs in lacking the pronounced lobes of the hypogyniura characteristic of that species, and also in the nature of the ligule, which is chartaceous throughout in S. cyperina, but membranaceous-margined in S. tepuiensis. The leaves in the latter species also average somewhat narrower, at least in the specimens observed. Only two other known members of the section Hymenolytrum, in addition to S. tepuiensis, lack the large, conspicuous, scarious appendage to the ligule found in most members of that section. The third species, S. grandis, is a very robust plant with leaves 18-35 mm. wide. The specific epithet refers to its occurrence on sandstone mesas of Venezuela and British Guiana, which are known locally as tepuis. tj By Earl L. Core
BOTANICAL EXPLORATION IN VENEZUELA - I 53 Tribe CRYPTANGIEAE (LA GENOCARPEAE) 8 Exochogyne amazonica C.B.Clarke, var. esmeraldensis Gilly, var.nov. Perennis, rhizome brevissime repens; folia basalia 4-6, vaginae ad 6 cm. longae dense et minute pilosulae, lamina linear! ad 20 cm. longa et 1.5 mm. lata, glabra marginibus inferioribus sparse hirsutulociliolatis excepte; culmi floriferi glabri erecti graciles, cum inflorescentia ad 12 cm. alti; inflorescentia ad 3 cm. longa, bractea subfoliacea acuminata, inferioribus ad 4 cm. longis, medioribus ad 1.2 cm. longis, glabra, marginibus inferioribus dense albo-ciliatis excepte; spicae bisexualae, cum spiculae masculae 2-4 et foemineae 2 vel 3; spiculae masculae 7-9 mm. longae et 0.5-0.7 mm. latae, glumis vacuis 2 ovatis vel lanceolato-ovatis glabris, ad 2 mm. longis, glumis fertilibus 2 vel 3 lineari-lanceolatis glabris vel sparse pubescentibus ad apicem; stamina a gluma fertile subtenta 2, filamentis persistentibus; spiculae foemineae ad 2 mm. longae, glumis 3-5 ovatis glabris, 1-2 mm. longis; achaenium breviter stipitatum glabrum laeve bisulcatum oblongo-quadrangulatum sublenticulare, cum rostro laevi et inflato-clavato ad 2 mm. longum; rostro quam corpore achaenii dimidio breviore; squamellae hypogynae nullae; stylus bifidus, stigmatibus brunneis ad 3 mm. longis. Type in herb. Chi. Nat. Hist. Mus., isotype in herb. Iowa State College, collected on dry savanna between Esmeralda Savanna and southeastern base of Cerro Duida, Territorio Federal Amazonas, alt. 200 m., August 22, 1944, Julian A. Steyermark 57805. The typical phase of the species is a more robust plant with longer leaves, larger inflorescences, and with 6 or more staminate spikelets in each spike, originally collected from a tributary of the Rio Madeira in the southwestern part of the Amazon basin. The several previously described "species" of this genus which is thus far known only from 6 or 7 collections from isolated Amazonian savannas appear to represent minor variants of a single species. Exochogyne Steyermarkii Gilly, sp. nov. Perennis, subrhizomatis vel caespitosis; folia basalia 4-6, vaginae ad 10 cm. longae sparse et minute adpresso-pilosulae, laminis linearibus ad 40 cm. longis et 1 mm. latis, glabris vel subtus sparse strigillosis; inflorescentia ad 10 cm. longa, bractea inferiore foliacea ad 18 cm. longa et 1 mm. lata, bracteis medioribus ad 1.5 cm. longis et 1 mm. latis, glabra e vagina minute strigillosa excepta; spicae bisexualae, cum spiculae masculae 2 vel 3 et spiculae foemineae 2 vel 3; spiculae masculae 4-5.5 mm. longae et 0.3-0.5 ram. latae, glumis vacuis 1 vel 2 lanceolatis vel ellipticis glabris, ad 2 mm. longis, glumis fertilibus 2 vel 3 linearibus vel lineari-lanceolatis glabris, ad 5.5 mm. longis; stamina a gluma fertile subtenta 2, 8 By Charles L. Gilly
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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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