36 POACEAE. 



Wahatoya Creek; Middle Park; near Denver; Trimble Springs; North 

 Park; Sangre de Cristo Creek; Saguache Creek; Fort Collins; Chambers' 

 Lake ; Larimer Co. ; Fort Collins. 



39. SCHEDONARDUS Steud. WILD CRAB-GRASS. 



i. Schedonardus paniculatus (Nutt.) Trelease. (S. Tex anus Steud.) 

 In sandy soil, especially on river-banks from 111. and Man. to Ass., Tex. and 

 N. M. Alt. 4000-6000 ft. Vicinity of Boulder; New Windsor, Weld Co.; 

 Fort Collins ; Colorado Springs ; vicinity of Pike's Peak ; Arboles ; Denver. 



40. BOUTELOUA Lag. GRAMA, MESQUIT-GRASS. 



Spikelets usually more than one ; cespitose perennials. 



Awns manifestly arising from between the lobes of the flowering glumes. 



i. B. polystachya. 

 Awns terminating the lobes of the flowering glumes. 



Stem densely villous below. 2. B. eriopoda. 



Stem glabrous. 



Rachilla bearing the rudimentary glumes and awns glabrous ; second glume 



strongly papillose-hispid on the keel. 3. B. hirsuta. 



Rachilla bearing the rudimentary glumes and awns with a tuft of long 

 hairs at the apex ; second glume scabrous and sparingly long-ciliate on 

 the keel. 4. B. oligostachya. 



Spikelet solitary ; tufted annual. 5. B. prostrata. 



1. Bouteloua polystachya (Benth.) Torr. In river-valleys from Tex. to 

 Calif. San Juan and Mancos Valleys (Brandegee). 



2. Bouteloua eriopoda Torr. In dry soil from Tex. to Calif. San Juan 

 Valley (Brandegee). 



3. Bouteloua hirsuta Lag. On plains and prairies, especially in sandy soil, 

 from 111. and Minn, to S. D., Tex. and Ariz. Alt. 4000-7000 ft. Vicinity of 

 Boulder; Twin Lakes; Manitou; Colorado Springs; Meadow Park. 



4. Bouteloua oligostachya (Nutt.) Torr. On plains and prairies from Wis. 

 and Man. to Ass., Miss, and Ariz. ; also in Mex. Alt. 4000-8000 ft. Vicinity 

 of Boulder; New Windsor, Weld Co.; Buena Vista; Fort Collins; Denver; 

 Mancos ; Durango ; Fort Morgan ; Georgetown ; Walsenburg ; Gunnison ; Col- 

 orado Springs ; Twin Lakes ; Fort Garland ; between Ft. Collins and La 

 Porte; Alamosa; Poudre Canon ; Baxter's ranch; prairie near Long Lake; 

 Rocky Ford. 



5. Bouteloua prostrata Lag. Plains and hills from Tex. to Colo, and Ariz. ; 

 also in Mex. Alt. 7500-8500 ft. Colorado Springs; vicinity of Ouray; 

 Manitou. 



41. ANTHEROPOGON Muhl. 



i. Antheropogon curtipendulus (Michx.) Fourn. (Bouteloua racemosa 

 Lag.) On hillsides, in canons and dry valleys from Ont. to N. D., N. J., 

 Tex. and Ariz.; also in Mex. Alt. 4000-7000 ft. Vicinity of Boulder; Mani- 

 tou; foot-hills, Larimer Co.; Meadow Park; Durango; Walsenburg; Fort 

 Collins; Colorado Springs; gulch west of Soldier Canon; Poudre Canon. 



