266 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



' [Vol. 9. No. 3 



FIG. 7. Ichnanthus tectus Swallen. a, spikelet; b y sterile and fertile lemmas; d, e, 

 margin of blade, a-c X 8; d, e X 20. 



shorter than the spikelets; first glume 4 mm long, obtuse; second glume and 

 sterile lemma subequal, obtuse, exceeding the fruit, the lemma with a well 

 developed palea; fruit 4 mm long, acute, scabrous at the summit, the base pro- 

 longed in a thickish stipe, the articulation on the ventral side; wings 1.5 mm 

 long, thin, somewhat flabellate. 



TYPE: frequent, cumbre just south of valley head of Camp Cano, sabanita 

 and scrub forest, alt. 2000 m, Serrania Paru, Rio Paru, Cano Asisa, Rio Ventuari, 

 Terr. Amazonas, Venezuela, February 2, 1951, R* S. Cowan & John /. Wurdack 

 31139; U. S. National Herbarium No. 2,040,249. 



Ichnanthus angustus Swallen, sp. nov. 



Perennis; culmi erecti 50-100 cm alti; vaginae internodiis longiores, glabrae, 

 suprema elongata; ligula dense ciliata ca. 2 mm longa; laminae 37-50 cm longae, 

 9-11 mm latae, acuminatae, supra basi plus minusve pilosae, marginibus irregu- 

 laris scabris; paniculae angustae, 13-20 cm longae, ramis anguste adscenden- 

 tibus scabrissimis; spiculae 4 mm longae, scabrae; gluma prima 3 mm longa, 

 obtusa; gluma secunda et lemma sterile subaequalia, obtusa, fructu paulum bre- 

 vioja; fructus 3.5-3.6 mm longus, acutus, stipitatus, alis tenuibus obtusis 1.3- 

 1.6 mm longis. 



Perennial; culms erect, 50-100 cm high; sheaths overlapping, glabrous, the 

 uppermost elongate; ligule a dense rim of hairs about 2 mm long; blades 37-50 cm 

 long, 9-11 mm wide, acuminate, narrowed toward the base but not long attenuate, 

 more or less hairy on the upper surface at the base, the margins irregularly 

 serrate, very scabrous; panicles narrow, 13-20 cm long, the branches very 

 scabrous, rather narrowly ascending; spikelets 4 mm long, mostly densely sca- 

 brous; first glume 3 mm long, obtuse; second glume and sterile lemma subequal, 

 obtuse, a little longer to slightly shorter than the fruit, the lemma enclosing a 

 well developed palea; fruit 3.5-3.6 mm long, acute, the base prolonged in a stipe, 

 the articulation on the ventral side; wings thin, obtuse, 1.3-1.6 mm long. 



TYPE: Cumbre, alt. 1800 m, Serrania Paru, Rio Ventuari, Rio Pani, Cano 

 Asisa, Terr. Amazonas, Venezuela, February 11, 1949» Kathleen 0. Phelps & 

 Charles B. Hitchcock 476; U. S. National Herbarium No. 2,078,745. 



