AdUoSTlDlO/K. 



'X\\ 



tint or involute, tlu' liir;,'e!it 'I nun. wiili', tliosi- of the culm .'J, tho 

 iippcr one lllirurrn, ri^'iil. ;J-»J 

 (in. Ion;,'. I'unicle much ex- 

 serted, open, thin, lloxuod'', 15- 

 '.'() em. lon^', niys .slender in 

 two.s, threes or lonrrt. acme of 

 them half us lon^'iw theimniele, 

 hearing a few flowers above the 

 middle. Empty ^dumes equal, 

 ;,'reen on the haek, brownish 

 towards the thin nuir^ins and 

 apex, elliptical-lanceolate. 5- 

 nerved, S-10 mm. lon<r; lloret 

 lance-obovate, flattened, pubes- 

 cent, becoming dark brown, 6 

 mm. long; awn irregularly bent, 

 twisted for the lower half, about 

 '^0 mm. long; palea firm, nearly 

 as long as its glume. Stamens 3. 



Mexico, Pritufh 1410. 



Arizona and Mexico. 



13. 0. fimbriata llemsl. 

 liiol. (Jentr. Am. Hot. 3:538 

 (1880). SI ifxt fimbriata II. H. 

 K. Nov. Gen. et Sp. 1: 12(i (1815). 



A slender tufted erect perennial, 50-80 cm. high. Sheaths of 

 the culms smooth, shorter than the intcrnodes; ligule very thin. 3 

 mm. long; blades of the sterile shoots numerous, softly smooth, erect 

 or curved, involute, 15-40 cm. long, \.'i mm. wide, the upper blade 

 5-10 cm. long. Panicle slightly exserted, simple, lax, secund. 10- 

 13 cm. long; rays scabrous, mostly in remote pairs in the axils of 

 the membranous bracts, the longest ray about 5 cm. long bearing 

 3-5 spikelets. Empty glumes chartaceous, oval, abruptly })ointed, 

 3-nerved, about 5 mm. long; floret 4 mm. long, oval or obovoid- 

 oval. clothed with short fuscous hairs; awn green, tortuose, irregu- 

 larly twisted. 1.5-3 mm. long. 



Fio. i'i.—Oryzopsis Pringlei. Spikelet. 

 (liicliurdson.) 



