MANUAL OF THE GKASSES OF THE UNITED STATES 



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2, shorter; panicle narrow, 3 to 6 cm long, the branches appressed, the 

 lower 1 to 2 cm long; spikelets short-pediceled, glumes abruptly acute, 

 4 mm long; lemma appressed-pilpse, about as long as the glumes, the 

 awn about 5 mm long, not twisted, geniculate. 01 Dry open 



FIGURE 866. Oryzopsis hendersoni. Plant, X V A', spikelet and floret, 

 X5. (Type.) 



FIGURE 867. Oryzopsis exigua. 

 Panicle, X 1; floret, X 6. 

 (Nelson 6511, Wyo.) 



ground or open woods, at moderately high altitudes, Montana to 

 Washington, south to Colorado, Oregon, and Nevada (fig. 868). 



5. Oryzopsis pungens (Torr.) Hitchc. (Fig. 869.) Culms tufted, 

 erect, slender, 20 to 50 cm tall; blades elongate, slender, flat or 



involute, less than 2 mm wide; panicle narrow, 3 

 to 6 cm long, the branches erect or ascending or 

 spreading in an thesis; spikelets long-pediceled ; 

 glumes 3 to 4 mm long, obscurely 5-nerved, 

 obtuse; lemma about as long as the glumes, 

 rather densely pubescent, the awn usually 1 to 2 

 mm long. 91 Sandy or rocky soil, Labrador 

 to British Columbia, south to Connecticut, 

 Indiana, South Dakota, and Colorado (fig 870). 



6. Oryzopsis canadensis (Poir.) Torr. (Fig. 871.) Culms slender, 

 tufted, erect, 30 to 70 cm tall; ligule about 2 mm long; blades flat to 

 involute, scabrous; panicle open, 5 to 10 cm long, the slender flexuous 

 branches ascending or spreading, naked below, few-flowered above; 



FIGURE 868. Distribution of 

 Oryzopsis exigua. 



