340 POACE.E. 



Oregon, [foKH'U. Sm'bncr, Ilvudvrxon. 

 Wasliiiigton iiiul Oregon. 



3. C. OrizabsB {\\\\\n\) Steud. Syn. PI. Gram. 193 (1855). 

 Dci/nLn'a Orizahw \{\\\^v. liull. Aciul. lirux. 1», part 2:233 (1842). 



A slender erect tufted perennial, about 90 cm. high. Sterile 

 shoots numerous, the blades conduplieate. 40-GO cm. long, 0.5 mm. 

 diam., those of the culm 2 in number; sheaths smooth ; ligule very 

 short; blades 5-lOcm. long. Panicle slender, thin, drooping, 10-15 

 cm. long, rays mostly in threes, rather distant, the longest 6-8 cm. 

 long, sparingly branched aiul flower-bearing on the outer half. 

 Spikelets linear. 4 mm, long: empty glumes and floral glume 

 ecpial, flrst glume 1-nerved, second 3-nerved; floral glume oval 

 Avh(;n spread, obtuse, tuft of hairs very short, awn one-third the 

 way below the apex and projecting about 1 mm., rudiment 1.5 mm. 

 long; palea linear, hyaline, 3 mm. long. 



Mexico, /'/-////y/f 4243; found 12UOO-14000 feet above the sea- 

 level. 



4. C. erecta. C. phtniosu (Fourn.) Scribn. ined. Achivta 

 jihinwm Fourn. Mex. PI. Enum. Oram. 109 (1880). 



An erect tufted perennial, (10-80 cm. high. Sterile shoots 

 numerous, the blades involute, flliform, 30-40 cm. long. 0.3-0.6 

 mm. diam., those of the culri 3 in nunil)er, the sheath of the middle 

 one smooth, two-thirds as long as the internode; ligule, 3 mm. long; 

 blades 10-15 cm. long, the upper blade shorter. Panicle })urple. 

 slender, tliin, slightly drooping. 10-14 cm. hmg, rays nu)stly in 

 ])airs, the longest 3-5 cm. long, bearing spikelets on the outer two- 

 thirds. Spikelets linear-lanceolate, 5.5 mm. long; empty glumes 

 equal, flrst 1-nerved, second 3-nerved: floral glume pubescent when 

 seen uiuler a lens. 4.5-4.T mm. long. truncate-toot!:ed: awn 0.5-1 

 nun. long, attached but little below the apex of its glume: rudiment 

 puberulent, 2.1 mm. long; palea hyaliiu'. ;{..") n.m. long. 



The si)ecific name phtniom under CiiUiDHKjrosiix had been used 

 by Spreng, hence the new name here given. 



Mexico, Pringle 4T2G, found under pines at an altitude of 

 10,400 feet. 



5. C. Suksdorfii Scribn. Hull. Torr. Club, 15:9 (1888). Ay/- 



