274 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[Vol. 9. No. 3 



Perennial; culms erect, to 2 m or more tall; nodes glabrous; sheaths glabrous, 

 the lower longer than the internodes, the upper shorter, the margins prolonged as 

 auricles at the collar; ligule membranaceous, firm, 3-4 mm long; blades up to 65 

 cm long, to 1.5 cm wide, scaberulous on both surfaces, the tip long-attenuate, 

 the base narrowed and thickened; inflorescence 35 cm long, composed of numer- 

 ous long, fascicled branches; peduncles 8 cm or more long, spreading, each en- 

 closed by a sheath about two-thirds as long as peduncle; racemes solitary, 3-6 

 cm long, densely white hairy; rachis-joints 4-7.5 mm long, long-pilose on the 

 margins, sometimes one side pilose on the upper half only, scaberulous over 

 the back; spikelets paired, one sessile, the other pedicellate; sessile spikelet 

 4.5-5.5 mm long; first glume as long as the spikelet (excluding the awn), 6- 

 nerved, longitudinally sulcate, the margins and tip scabrous-ciliate; second 

 glume strongly keeled, the keel shortly ciliate toward the tip, finely ciliolate on 

 the thin, margins; sterile lemma 2-keeled, about as long as the second glume, 

 the margins finely ciliolate toward the tip; fertile lemma 3.5-4 mm long, thin, 

 transparent, bifid at the apex, awned from between the lobes; awns prominent, 

 once-geniculate, twisted 3-5 times to the first bend, brown when dry, the ter- 

 minal portion pale, antrorsely scabrous; palea a nerveless scale two-thirds as 

 long as the lemma; lodicules 2, 0.5-0.9 mm long; stamens 3, anthers 2-2.5 mm 

 long; ovary developed; pedicel of the pedicellate spikelet 3.5-4 mm long, long- 

 pilose on the margins; sterile spikelet 2-4 mm long, narrow; first glume sca- 

 berulous, short -awned (0.5 mm or less); second glume reduced to a small scale. 



TYPE: frequent in deciduous woodland between Campo Verada and Campo M. 

 Perez, Cano Verada, Cerro Guanay, elev. 900-1100 m, Cano Guaviarito, Rio 

 Ventuari, Amazonas, Venezuela, Jan. 30, 1951, Bassett Maguire, Kathleen D. 

 Phelps, Charles B. Hitchcock & Gerald Budowski 31661; U.S. National Her- 

 barium No. 2,078,750. 



Andropogon perdignus Sohns, sp. nov. Figure 11. 



Perennis, caespitosus; culmi erecti, fere 3 m alti, glauci, nodis glabris; 

 vaginae glabrae, internodiis breviores, interdum leviter glaucae; ligula mem- 

 branacea, circiter 2 mm longa; laminae fere 45 cm longae, usque ad 15 mm latae, 

 omnes glabrae vel supra leviter scaberrimae, subtus costa media prominula; in- 

 florescentia 25*35 cm longa; racemi 2-4 cm longi, dense albo-pilosi; articuli ca. 

 3 mm longi, marginibus dense longe pilosi, dorso scaberrimi; spathae racemos 

 aequans vel longiores; spiculae sessiles 4-5 mm longae; gluma inferior spiculam 

 aequans, 4 (-6)-nervis, prope basin sulcata, marginibus inflexis, ciliolatis, 

 apice^ scaberrima, dorso plana; gluma superior primam aequans, leviter carinata, 

 3-nervis, costa media breve pubescento-ciliolata; lemma sterile membranaceum, 

 bicarinatum, marginibus ciliolatum; lemma fertile 3-3.7 mm longum, membra- 

 naceum, bifidum; arista 1.5-2 cm longa, exserta, geniculata; palea lemma fertile 

 subaequans, membranacea, bicarinata, apice ciliolata; lodiculae 2, 0.5-0.7 mm 

 longae; stamina 3; antherae 1.5 mm longae; pedicelli spicula sessili breviores, 

 plani, marginibus leviter longe pilosi; spiculae pedicellatae 2.4-3 mm longae, 

 latae; gluma prima 5-nervis (gluma secunda et lemma sterile inclusa). 



Perennial; caespitose; culms erect, up to 3 m tall, glaucous; nodes glabrous; 

 sheaths glabrous, shorter than the internodes, sometimes slightly glaucous at the 

 base; ligule a firm membranaceous rim about 2 mm long; blades up to 45 cm long, 

 15 mm wide or less, glabrous on both surfaces, or slightly scaberulous on the 

 upper surface, the midnerve prominent on the lower surface, the base of the 

 blade narrowed and slightly thickened, the margins inrolled slightly and an- 

 trorsely scabrous; inflorescence 25— 35 cm long, loosely branching; racemes 2-4 

 cm long, densely white-pilose and enclosed at the base by the subtending spathe; 

 rachis-joints about 3 mm long, densely long-pilose on the margins and scaberu-. 



