Ex. Doc. No. 41. 153 



I J 



2-toothed, with a short awn between the teeth; lower palea of the 

 perfect flower obscurely 3-nerved, gibbous in the middle, the mar- 

 "in ciliate, with long hairs towards the summit; awn three time 



es as 



ong as che palea; neuter flower broad and truncate, inclosing a 

 short aristiform rudiment; the awn twice as long as the palea. Bed 

 the Crila. ^ Very near C. barlafa, which differs in the entire 

 glumes, which are only mucronate (not awned) in the entire straight 

 lower palea of the perfect flower, and in the third or arlsfiform 

 flower, being much exserted. 



Boutelona racemosa, Lagasca.l Culm erect, simple; spikes nu- 

 merous (20—40) reflexed, 3-flowered, lower glume linear-nebulate; 

 upper one hnear-knceolate, scabrous, entire, nearly as long as the 

 spikelets; lower palea of the perfect flower unequally tricuspidate, 

 pubescent, abortive flower reduced to a slender awn, which is nearly 

 as long as the perfect flower, furnished at the base, with 2 short 

 and inconspicuous bristles. Valley of the Gila, rare. This plant 

 agrees pretty well with Kunth's description of ^. {Eutriana,) race- 

 m-osa, except in the pubescent lower palea, and the minute bristled 

 at the base of the neuter flower. Whether it be the plant of La- 

 gasca or not is very difficult to determine from his brief character. 



vf-^t!^u^^^ ^^ ^ery different from jS. racemosa of the United States, 

 ^nich has a large 3-awned neuter flower, and if distinct from La- 

 gasca s, must receive another name. That of B. curtipendula 

 would be appropriate. ^ ■ 



fj'hondrosium eriopodum, n. sp. Culm simple, pubescent below; 

 spikes 4 6, racemose appressed; spikes on short woolly peduncles, 

 ^pikelets 2-flowered; flowers dist-Ichous; glumes very unequal, glab- 

 ous linear-lanceolate, mucronate, entire; lower palea of the per- 

 fect flower glabrous, bifid at the apex, with a short bristle between 

 on f u' ^^^^^^ flower pedicellate, with 3 slender awns. This is 



e ot the species of "Grama" so useful as a fodder-grass in New 

 tw^^'^°V ^* ^^ abundant along the Del Norte, and in the region be- 

 ^ween that river and the waters of the Gila. The culm is slender, 



oot or more in height. Leaves are very narrow, 2 — 3 inches 



ng, With glabrous sheaths; sessile almost wantinof. Spikes about 



three-fourths of «t, ^nnh ^nnn■ 



nondrosium fceneum, n. sp. Leaves glabrous; spikes 2 — 3, ob- 



Sy lolcate, spreading; rachis nearly half the length of the spikes; 



pper glume nearly as long as tue perfect flower, with two rows of 



aV f *i^^ glands on the back; lower palea deeply 3-cleft, the reg- 



of t ^ ^^^ mucronate, hairy on the margin; neuter flower 



thirJ'fl truncate emarginate valves, w^ith a2-valved rudiment of a 



of th yj^^^'^^^d 3 short stout awns. Uplands bordering the valley 

 jif A/r - -^'^orte,^ This is another of the grasses called Grama in 

 . "^ T "^^^"^^ ^^^^ ^® *^^ ^^st kind, being almost as good fodder as 



oats. It 



''f^yum of Nuttall. 



Atheropogon (Ckondrosium,) 



bo?j^°^^^°l*^"' Polystachyum, Bejith. hot. Sulph. p. 56. Uplands 

 journ""^ the Gila. The smallest kind of " Grama'' found on the 

 'iarro^^' . ^^ about 6 inches high, very slender. The spikes are 



wjy linear, and almost half an .inch long, erect, on stort 



