410 POACEiE. 



1. C. pluriflora (Fourn.) Kuntze, Kev. Gen. PI. 2: 771 (18!il). 

 T. pluriflora Fourn. Hemsl. Biol. Centr. Am. Bot. 3:5G0 (1880). 



Culms 40-50 cm. high. Lesives G-7, sheaths subcomi)resse(l, 

 sliorter than the iuternodes, eiliate at the throat; ligule a ciliiite 

 ring; blades flat, scabrous, narrowed at both extremities, 12-15 cm. 

 long, 5-7 mm. wide. Spikes 10-23 in number, 5-7 cm. long, in 

 2-4 whorls. Spikelets 3-5-flowered ; empty glumes hyaline, bristle- 

 pointed, 1-nerved, first about 1.5 mm. long, second about 2.5 mm. 

 long; lower floral glume linear, ciliate on the margins, lateral 

 awns 1-2 mm. long, central T-11 mm. long; palea as long as its 

 glume, scabrid on the keels. Grain triquetrous, 2.2 mm. long. 



Texas, NeaUey for Nat. Mus. ; Mexico, Priiiffle 2512. 



2. C. fasciculata (Fourn. ) Kuntze, Rev. Gen. PI. 2:771 (1891). 

 Trichlorin fdscicttlata Fourn. Benth. Journ. Linn. 8oc. 19:102 

 (1881). 



Culms smooth, about 60 cm. high. Blades 20-.30 cm. long, 

 7-10 mm, wide, upper sheath often partially including the panicle. 

 Panicle 12-16 cm. long, with 15-30 rays in close whorls. Spikelets 

 1-3-flowered, the florets much shorter towards the top of tiie spike- 

 let; first empty glume awl-shaped, about 2 mm. long including the 

 awn, 1-nervetl, second ovate-lanceolate, 1-nerved, not toothed, 2 

 mm. long, with an awn half its length; floral glume ovate-lan- 

 ceolate, hairy on the margins and at the base, over 3 mm. long, 

 bearing a central awn 5-10 mm. long, and two lateral ones 1-2 mm. 

 long; palea as long as its glume. Grain 1.5 mm. long. 



a Wright 263, 2025. 



Texas to Arizona. 



88. (177). GymnopOGON Beauv. Agrost. 41, t. 0. f. 3 (1812). 

 Anthopofjon Nutt. Gen. 1:81 (1818). Biafhcrium Desv. Opusc. 

 72 (1831). Diclia'taria Nees, Steud. Syn. PI. Gram. 145 (1855). 



Spikelets 1-flowered, subsessile, remotely alternate on two sides 

 of a slender triquetrous rachis, rachilla jointed above the lower 

 glumes, extending above the floret and bearing a glume. Empty 

 glumes 2, more or less unequal, narrow, 1-3-nerved, acute or the 

 second bearing a short awn; floral glume a little broader, 3-nerved, 

 the ml^j^0ve«^-fex]t?}ndiug into a straight awn; terminal glume 



