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146 FIELDIANA: BOTANY, VOLUME 28 Type collected on summit of Cetro Duida, on high moist ridge top, Territorio Federal Amazonas, alt. 1820-2075 m., September 4, 1944, Julian A Steyermark 58320* FIGURE 23 Guzmania retusa. A, Flower (X 2/3); B, Inflorescence (X 2/3>, C, Apex of leaf (X 2/3). Pitcairnia cinerea. D, Sepal (X 2/3 >, E, Leaf (X 2/3); F, Branch of inflorescence (X 2/3). TiLlands ia stenoglossa. G, Apez of leaf (X 2/3); H, Branch of inflorescence (X 2/3). Navia Steyermarkii L. B. Smith, sp. nov. Caulescens; caule ultra 2 dm. longo; foliis caulem dense quaquaverse vestientibus, patentibus, vaginis brevibus, omoino occultatis, la minis linearibus, acuminatis, ca. 20 cm. longis, 8 mm. latis, laze
BOTANICAL EXPLORATION IN VENEZUELA - I 147 minuteque serrulatis, supra glabris, subtus dissite piloso-lepidotis mox glabris, utrinque viridibus; inflorescentia dense capituliforme, in foliorum centre nidulante, 15 mm. diametro; bracteis florigeris lanceolatis, sepala superantibus, ad apicem versus serrulatis; floribus sessilibus; sepalis liberis, 13 mm. longis, oblongo-lanceolatis, acutis, glabris, posticis carinatis; petalis ad 21 mm. longis, albis; staminibus styloque inclusis (Fig. 21,f-h). Type collected on moist southeastern-facing sandstone bluffs near Cano Negro (tributary of Canb Iguapo), Cerro Duida, Territorio Federal Amazonas, alt. 1095-1520 m., August 26, 1944, Julian A. Steyermark 58012. Navia xy rid iflore L. B. Smith, sp. nov. Aggregata, caulescens; caule robusto, ukra 1 dm. longo; foliis caulem dense quaquaverse vestientibus, persistentibus, patentibus, vaginis brevibus, omnino occultatis, laminis linearibus, acuminatis, ad 19 cm. longis, 16 mm. latis, dense minuteque serrulatis, supra glabris viridibusque, subtus griseis, dissite minuteque punctulatolepidotis; inflorescentia dense capituliforme, in foliorum centro nidulante, pauciflora; bracteis florigeris ellipticis, apiculatis, sepala superantibus, coriaceis, brunneis, apice lepidotis; floribus sessilibus; sepalis liberis, posticis spathulatis, 11 mm. longis, ad apicem versus valde alatis et lepidotis; petalis albis, delapsis solum cognitis (Fig. 21, i-j). Type collected on dry slopes, Brocchinia Hills, Cerro Duida, Territorio Federal Amazonas, alt. 1700-1980 m., September l f 1944, Julian A t Steyermark 58152. In habk, Navia xyridiflora appears practically identical with N. angustifolia except for a slightly more even upper leaf-surface, yet the sepals show die strongest contrast in the genus. In N. xyridiflora they are strongly heteromorphic with the posterior ones spatulate and broadly alate, while in N. angustifolia they are all lance-oblong and not at all alate. The following key shows how the above novelties are distinguished from previously known members of Navia: 1. Inflorescence elongate, interrupted N caulescens. 1. Inflorescence densely capitate or glomerate. 2. Leaf-blades 12-19 mm. broad, densely serrulate. 3. Inflorescence distinctly scapose, glomerate from several heads; leaf-blades densely white-lanate beneath; sepals 5.5 mm. long. N. bicolor. 3. Inflorescence sessile, capitate; leaf-blades glabrous or sparsely and obscurely punctulate-lepidote beneath; sepals 11-19 mm. long. 4. Sepals to 19 mm. long, lance-oblong, subsimilar, not dilated toward apex N. angustifolia.
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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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