408 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[yol. 9, No. 3 



VENEZUELA: Bolivar: occasional in open places near rock ledges, alt. 1895-1910 m, 

 summit, along Cano Mojado, between base of upper falls and drop to escarpment, Torono- 

 tepui, Chimanta Massif, Estado Bolivar, Venezuela, February 23, 1955, Steyermark & 

 Wurdack 1066; infrequent, rocks in Cano Sabana, Savanna Camp, 4500 ft, Cerro Sipapo 

 (Paraque), Terr. Amazonas, Venezuela, December 21, 1948, Bassett Maguire & Louis 

 Politi 27829; occasional, rocks in stream bed, Lower Cano Negro, January 1, 1949, 

 Maguire & Politi 28115; infrequent, dissected terraces, se slopes Peak IV, elev. 1800 m, 

 Cano Negro Basin, January 3, 1949, Maguire & Politi 28143; bunch grass, frequent along 

 stream bed, left branch of Cano Yutaje, elev. 1200 m, Cerro Yutaje, Serrama Yutaje, Rio 

 Manapiare, February 25, 1953, Bassett & Celia K. Maguire 35411. 



This species, mostly with solitary racemes, has a spikelet structure similar 

 to that of A. macrothrix Trin.. common in Brazil, in which the racemes are two 

 or more. 



ERIOCAULACEAE 24 



Paepalanthus apacarensis Moldenke, sp. nov. 



Herba pumila subacaulescens; foliis caespitosis patentibus coriaceis obtusis 

 utrinque glabris praeter marginibus ad apicem ciliolatis; pedunculis solitariis 

 brunneis plusminusve parce pilosulis; vaginis adpressis brunneis glabris praeter 

 ore plusminusve piloso; capitulis hemisphaericis albidis; bracteolis involucri 

 nigris ovatis acutis adpresso-pilosis ciliatis. 



Dwarf herb; stems much abbreviated or obsolete; leaves cespitose, spreading, 

 coriaceous, bright-green when young, brunnescent in age, 4-7 mm long, about 1 

 mm wide at the middle, obtuse at the apex, glabrous on both surfaces except for 

 the more or less ciliolate margins near and at the apex, not fenestrate nor striate; 

 peduncle solitary, erect, brown, 5-6.5 cm long, more or less sparsely pilosulous 

 with rather spreading hairs, several-costate; sheath appressed, about 1 cm long, 

 brownish, glabrous except for the more or less pilose mouth, the blade erect, 

 about 2 mm long, appressed, acute at the apex, somewhat ciliolate-margined; 

 heads hemispheric, whitish, about 7 mm wide; involucral bractlets rather firm, 

 black, ovate, about 2.5 mm long and 1.2 mm wide, acute at* the apex, appressed- 

 pilose on the back, ciliate-margined; flowers subsessile; staminate florets: se- 

 pals 3, separate, oblanceolate, brownish toward the apex, about 2 mm long and 

 0.7 mm wide, more or less navicular and concave, acute at the apex, slightly 

 falcate, densely white-barbate on the back near and at the apex; petals 3, united 

 into a slender tube about 2.2 mm long, stramineous, the free portions minute; 

 stamens 3, exserted; filaments filiform; anthers pale yellow or white; pistil- 

 rudiment included; pistillate florets: sepals 3, separate, narrow-elliptic, navicu- 

 lar, concave, about 2 mm long and 0.7 mm wide, blackish or brownish, subacute 

 at the*apex, densely white-barbate at the apex; petals 3, separate, brownish, ob- 

 long, flat, about 2 mm long and 0.5 mm wide, subacute or obtuse at the apex, 

 thin-textured, long-pilose from base to apex, very sparsely barbellate at the apex; 

 style rather stout, stramineous, about 1.2 mm long, glabrous, its 3 appendages 

 borne at the same level and alternate with the stigmas, about 0.5 mm long; stig- 

 mas 3, about 0.5 mm long; ovary subglobose, stramineous, about 0.5 mm long, 

 3-sulcate, 3-celled. 



TYPE: Julian A, Steyermark 75864, moist ledges of rock around talus of large 

 high rock on the east-central portion of the summit of Apacara-tepui, altitude 

 2450-2500 m, Chimanta Massif, Bolivar, Venezuela, on June 21 or 22, 1953 (Herb. 

 H. N. Moldenke). 



By H. N. Moldenke. 



