442 



MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



County), Indiana to Idaho, south in 

 the mountains to Utah and New 

 Mexico. 



Figure 633. — Oryzopsis racemosa. Panicle, X ^'» 

 floret, X 5. (Sartwell, N. Y.) 



9. Oryzopsis racemosa (J. E. 



Smith) Ricker. (Fig. 633.) 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, pubes- 

 cent beneath; panicle 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 acuminate; lem- 

 ma slightly shorter than the glumes, 

 sparsely pubescent, nearly black at 

 maturity, the awn 1.5 to 2.5 cm. 

 long, slightly flexuous. % — Rocky 

 woods, Quebec to Minnesota and 

 South Dakota, south to Virginia, 

 Kentucky, and Iowa. 



10. Oryzopsis bloomeri (Boland.) 

 Ricker. (Fig. 634.) Culms tufted, 30 

 to 60 cm. tall; leaves crowded at the 

 base; ligule about 1 mm. long; blades 



narrow, involute, firm; panicle 7 to 

 15 cm. long, the branches slender, 

 rather stiffly ascending, the longer 

 5 to 7 cm. long, spikelet-bearing 

 from about the middle; spikelets 

 rather long-pediceled; 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 be- 

 low, weakly geniculate. % — Dry 

 ground, medium altitudes, North 

 Dakota to eastern Washington, south 

 to New Mexico and California, rather 

 rare. 



Figuke 634. — Oryzopsis bloomeri. Panicle, X 1; floret, 

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



11. Oryzopsis webberi (Thurb.) 

 Benth. ex Vasey. (Fig. 635.) Culms 

 densely tufted, erect, 15 to 30 cm. 

 tall; blades involute, filiform, sca- 

 brous; panicle narrow, 2.5 to 5 cm. 

 long, the branches appressed; glumes 

 about 8 mm. long, narrow, obscurely 

 5-nerved, minutely scaberulous, acu- 

 minate; lemma narrow, 6 mm. long, 

 densely long-pilose, the awn about 

 6 mm. long, straight or bent, not 



