1957] 



BOTANY OF THE CHIMANTA MASSIF — I. 



405 



awn 4.0-5.5 mm long, loosely twisted, its base dark brown; palea as long as the 

 lemma, membranaceous, 2-keeled; stamens 3; ovary developed; lodicules 2, about 

 0.8 mm long, truncate. 



TYPE: locally frequent in moist sand along river, along Rio Tirica (Rio 

 Aparuren) just above Techine-meru, alt. 470 m, Chimanta Massif, Estado Bolivar, 

 Venezuela, January 16, 1955, Julian A. Steyermark & John J. Wurdack 122 (US 

 2,182,116). 



FIG. 76. Andropogon crassus Sohns. a, pair of spikelets; b, rachis-joints; c, first 

 glume; d, second glume; e, sterile lemma; /, fertile lemma; g, stamen, lodicules, and 

 palea; h, ligule, sheath, and blade, a-f, h, X 8; g, x 20 (type). 



Andropogon crassus Sohns, sp. nov. (Fig. 76.) 



Perennis; culmi erecti, graciles, 1 m alti vel altiores; vaginae glabrae, 

 inferiores internodiis breviores; ligula 1.5 mm longa; laminae lanceolato-lineares, 

 45 cm longae, usque ad 2 cm latae, omnes glabrae vel supra basin versus longe 

 pilosae, marginibus scaberrimae; inflorescentia multispatha, racemis 1-4 cm 

 longis, gracillimis, articulis 3 mm longis, marginibus dense pilosis, ceteroqui 

 glabris; spiculae sessiles ca. 4 mm longae; gluma inferior 4-nervia, dorso leviter 

 sulcata, marginibus apiceque scaberrimae; gluma superior 3-nervia, valde carinata, 

 scabra; lemma sterile 2.8-4 mm longum, 3-nervium, marginibus leviter ciliolatis; 

 palea lemmate subduplo brevior, enervia; lemma fertile 2-3.2 mm longum, bifidum; 

 arista laxe torta, 5-8 mm longa, scaberrima; palea 2-2.5 mm longa, membranacea, 

 enervia; lodiculae 2, 0.5-0.7 mm longae; stamina 3; antherae 1.5-1.8 mm longae; 

 spiculae pedicellatae 3-4 mm longae; anthoecia nulla. 



