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124 FIELDIANA: BOTANY, VOLUME 28 colonies and masses on wet bluffs, along base of south-facing sandstone bluffs, Ptari-tepul, state of Bolivar, alt. 2410 m., November 6, 1944, Julian A. Steyermark 59914. The collector notes that it is one of the commonest species on the bluffs. It resembles P Killipii Moldenke, from Colombia, in habit, but is abundantly distinct in characters of the leaves, peduncles, and flowers. Paepalanthus squamiliferus Moldenke, sp. nov. Herba caulescens; caulibus usque ad 9 cm. longis dense foliosis; foliis firme membranaceis erecto-patentibus 3.5-4 cm. longis, 2.5-4 mm. latis, acutis multistriatis non fenestratis utrinque glabris; vaginis anguste cylindricis adpressis tortis ca. 6 cm. longis multistriatis glabris, apice piloso-ciliato; pedunculis solitariis usque ad 40 cm. longis 5-costatis, parce pilosis, pilis irregulariter patentibus vel reflexis. Caulescent herb; stems to about 9 cm. long, very leafy, completely hidden by the leaf-bases; leaves firmly membranous, grass-green, erect-spreading, grass-like, 3.5-4 cm. long-, 2.5-4 ram. wide at the mid-point, acute, many-striate, not fenestrate, glabrous on both surfaces; sheath greatly surpassing the leaves, narrowly cylindric, appressed to the peduncles, twisted, about 6 cm. long, many-striate, glabrous except for the more or less pilose-ciliate apex, obliquely split at the apex, the blade erect, closely appressed, ovate, 0.5-1.5 cm. long, ciliate-margined when young, glabrous in age; peduncles solitary at the apex of each stem, to about 40 cm. long, sparsely pilose with irregularly spreading or retrorse white hairs, 5-costate; heads hemispheric or almost spherical, about 1.5 cm. in diameter, gray; involucral bractlets variable in size and shape, the outermost very dark brown or blackish, broadly elliptic, about 4.5 mm. long and 3 mm. wide, the inner ones oblong, slightly wider near the apex, dark-brownish, lighter toward the margins, about 4 mm. long and 1.5 mm. wide, acute at the apex, all rather sparsely long-villous in a central band on the back with more or less appressed antrorse hairs; receptacle long-villous; receptacular bractlets oblong or elliptic, about 34 mm. long and 0.8 mm. wide, usually more or less conduplicate-navicular, acute, long-villous in a median band on the back; staminate florets: sepals 3, connate only at the very base, erect, light-brownish, elliptic, about 3.5 mm. long and 1 mm. wide, obtuse at the apex, densely villous toward the apex on the back, not bearded, not glanduliferous; petals 3, connate into a slender tube about 4 mm. l n gi glabrous, not ampliate above, the separate lobes narrowly oblong, erect, 3-3.5 mm. long and 0.5 mm. wide, short-bearded at the apex, not involute, not glanduliferous; stamens 3, inserted at the mouth of the corolla-tube; filaments about 2.5 mm. long, black, glabrous; anthers not seen; pistillate florets: sepals 3, separate to the base, brown, broadly elliptic, about 3.4 mm. long and 1.9 mm. wide, acute, brownish, long-villous in a median band on the back, the margins lighter and usually conduplicate, not bearded, subtending a great mass of long, erect, villous hair; petals 3, separate to the base,
BOTANICAL EXPLORATION IN VENEZUELA - I 125 linear-lanceolate, 2.1-2.8 ram. long, about 0.3 mm. wide, more or less attenuate to the sharply acute apex, very densely long-villous on the back with wide-spreading hairs that far exceed the petals; style about 1 mm. long, glabrous, terminated by 3 erect flat styleappendages about 1 mm. long and 3 erect simple or bifid stigmas 1.9-2 mm. long; ovary small, with 3 erect scales about 0.3 mm. long at its base. Type in herb. New York Botanical Garden, collected in Brocchinia- Stegolepis-Heliamphora swamp on southwest-facing shoulder of Ptaritepuf, state of Bolivar, alt. 2200 m., November 2, 1944, Julian A. Steyermark 59777. The species is most remarkable because of the 3 erect scales subtending the base of the ovary. Apparently these represent the very much reduced corollas. Paepalanthus Steyermarkii Moldenke, sp. nov. Herba pumila; caulibus valde gracilibus 1-2 cm. longis foliosis plerumque furcatis; foliis numerosis linearibus 5*10 mm. longis subrectis vel recurvato-patentibus, 0.5-1 mm. latis obtusis utrinque densiuscule albido-pilosis; vaginis gracile cylindricis arete adpressis ca. 1 cm. longis dense albido-pilosis pedunculis paucis 2.5-3.5 cm. longis densiuscule albido-pilosis 3-costatis non tortis. Dwarf herb; stems very slender, 1-2 cm. long, leafy, often branched; leaves numerous, usually densely clustered at the apex of the stems or branches, 5-10 mm. long, linear above the sheathing base, suberect or recurved-spreading, 0.5-1 mm. wide, blunt, gray-green, not fenestrate, rather densely white-pilose on both surfaces; sheath slendercylindric, closely appressed to the peduncle, equaling the leaves, about 1 cm. long, densely white-pilose like the leaves, obliquely split at the apex, the blade linear, spreading, about 4 mm. long, blunt, white-pilose; peduncles slender, 1 or several per branch, 2.5- 3.5 cm. long, rather densely white-pilose with spreading or (more rarely) appressed hairs, 3-costate, not twisted; heads hemispheric, about 5 mm. in diameter, gray-white; involucral bractlets oblanceolate, 1.7-1.9 mm. long, about 0.8 mm. wide, light-brownish in a median band almost to the apex, translucent along the margins and at the apex, acute at the apex, glabrous throughout; receptacle longpilose; receptacular bractlets oblanceolate, about 1 mm. long and 0.5 mm. wide, very light-stramineous, obtuse at the apex, glabrous except for the densely bearded apex; staminate florets: sepals 3, separate practically to the base, oblanceolate, about 1.1 mm. long and 0.4 mm. wide, light-brownish or stramineous, obtuse, glabrous except for the densely bearded apex, not glanduliferous; petals 3, united into a slender glabrous subhyaline tube about 0.8-1 mm. long, the free terminal lobes about 0.3 mm. long, subhyaline or stramineous, erect, glabrous, involute at the apex, not glanduliferous; stamens 3, about equaling the petals; pistillate florets: sepals 3, separate practically to the base, elongate-oblong, about 1.8 mm. long and 0.4 mm. wide, attenuate to an acute apex, light-stramineous or trans-
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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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