CIILoUIDKvE. 41i» 



(1857). Cfinndrosinn [ChondrosiuiH] poli/sftwhj/uni Bciith. Hot, 

 Sulph. nn (1844). 



(!ulni8 .smooth, oroct, or sprcadiiijj; ami gt'iiidulutc, '^•0-40 cm. 

 hij,'li. liCiit'-Muilos imrrow, 3-0 cm. long, (;iliuto at tlu- li;,'iilo. 

 Spikes 3-6 or more, erect, linear, about 2 cm. long. Kinpty gliiinorf 

 liyulino, glabrouH, oval, 1-nervod, mucronate or sliort-a\vne<l, often 

 lobed or t'marginate, first 1 mm. long, second 1.5 mm. long; floral 

 glume broadly oval, the margins and back densely hairy, \J) mm. 

 long, 3-lobod with stout setie scarcely longer than the lol)es, (central 

 awn slightly longest; palea as long as its glume, 3-lobed, rachilla 

 hairy, bearing 3 setie, a small neutral floret, and above this a minute 

 empty glume. 



Texas, XmUcy for Nat. Mus. ; Lower California, Palmer r,'G, 

 508. 



Texas, Arizona, to California. 



7. B. arenosa Vasey, Grasses of S. West. Bull. 1^, Tart 1, 34 

 (1800). 



A slender diffuse annual, 15-25 em. high. Sheaths loose, 3-4 

 in number, half as long as the internodes; ligule lanceolate, 5 mm. 

 long, ciliato at the base; blades flat, 3-5 em. long, 1.5-2 mm. 

 wide. Panicle 5-0 cm. long, bearing 3-4 straight or curved one- 

 sided spikes. Spikes subsessile, about 2 cm. long, bearing about 

 20 spikelets. S})ikelets closely imbricate, each containing 1 })erfcct 

 and 1 rudimentary floret, about 3 mm. long, with awns })rojecting 

 3 mm. Empty glumes 1-nerved, often 2-tootbed, first lanceolate, 

 2 mm. long, second oval, 3 mm. long, short-awned; fioral glume of 

 the lower floret 2 mm. long, besides the teeth, clothed with fine 

 l)ubescence, ovate, 2-toothed, awns equal or subequal ; palea as long 

 as its glume, 2-4-toothed, with 3 short awns, seeoiul floret 1.5 

 mm. long, the 3 subequal, awns 4-5 mm. long. Neutral floret 

 bearing 3 subequal awns, 4-5 mm. long. 



Mexico (near (iulf of California), /'ah»er 180, Ofcutt. 



8. B. vestita (S. Wats.) Seribn. iiied. B. pnhjstach)ja Torr. var. 

 vestifa S. Wats. Proc. Amer. Acad. 18: 177 (1883). 



A tufted erect or diffuse grass apparently annual, 20-60 cm. 

 high. Sheaths ciliate at the throat; ligule very short; blades of the 



