420 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTUBE 



Figure 875.— Distribution of 

 Oryzopsis asperifolia. 



dry banks, Newfoundland to British Columbia and Montana, south 

 to Connecticut, Indiana, South Dakota, and New Mexico (fig. 875). 



9. Oryzopsis racemosa (J. E. Smith) Ricker. (Fig. 876.) Culms 

 tufted, from a knotty rhizome, erect, 30 to 



100 cm tall ; culm leaves several, the lowermost 

 blades reduced, the others elongate, flat, 5 to 

 15 mm wide, tapering at both ends, rather 

 thin, scabrous above, pubescent beneath; pan- 

 icle 10 to 20 cm long, the branches distant, 



the lower spreading or 



reflexed at maturity, 



bearing a few spikelets 



toward the end ; glumes 



7 to 9 mm long, about 



7-nerved, abruptly acu- 

 minate ; lemma slightly 



shorter than the glumes 



sparsely pubescent, 

 nearly black at maturity, the awn 1.5 to 2.5 cm 

 long, slightly flexuous. 91 — Rocky woods, 

 Quebec to Minnesota and South Dakota, 

 south to Delaware, Kentucky, and Iowa (fig. 

 877). 



10. Oryzopsis bloomeri (Boland.) Ricker. 

 (Fig. 878.) Culms tufted, 30 to 60 cm tall; 

 leaves crowded at the base; ligule about 1 mm 

 long; blades narrow, involute, firm; panicle 7 figure 876.— oryzopsis racemosa. 

 to 15 cm long, the branches slender, rather ^Vn.y/) floret ' x 5> 

 stiffly ascending, the longer 5 to 7 cm long, 



spikelet-bearing from about the middle; spikelets rather long-pedi- 

 celed; glumes "broad, indistinctly 3- to 5-nerved, rather abruptly 

 acuminate, 8 to 10 mm long; lemma elliptic, 5 mm long, densely long- 



villous; awn about 12 mm long, 

 tardily deciduous, slightly twisted 

 and appressed-villous below, weakly 

 geniculate. % — Dry ground, 

 medium alti- 

 tudes, Mon- 

 tana to east- 

 ern Washing- 

 ton, south to 

 New Mexico 

 and C ali- 

 fornia, rather 

 rare (fig. 879). 



11. Oryzopsis webberi (Thurb.) 

 Benth. (Fig. 880.) Culms densely 

 tufted, erect, 15 to 30 cm tall; 

 blades involute, filiform, scabrous; 

 panicle narrow, 2.5 to 5 cm long, the 

 branches appressed; glumes about 

 8 mm long, narrow, obscurely 5- 

 nerved, minutely scaberulous, acuminate; lemma narrow, 6 mm long, 

 densely long-pilose, the awn about 6 mm long, straight or bent, not 

 twisted. % — Deserts and plains, Colorado, Nevada, and California. 



Figure 877.— Distribution of 

 Oryzopsis racemosa. 



Figure 878.— Oryzopsis bloomeri. Panicle, X 1 

 floret, X 5. (Sandberg and Leiberg 231, Wash.) 



