GRASS FAMILY 



135 



1. Oryzopsis miliacea (L.) Benth. & Hook. 

 Millet Alountain-rice. 



Fig. 291. 



Agrostis miliacea L. Sp. PI. 61. 1753. 



Oryzopsis miliacea Benth. & Hook.; Aschers. & Schweinf. 

 Mem. Inst. Egypte 2: 169. 1887. 



Culms erect from a decumbent base, 60-100 cm. 

 tall; sheaths smooth; ligule about 2 mm. long; 

 blades flat, 8-10 mm. wide ; panicle as much as 30 v^ 

 cm. long, loose, the branches spreading ; glumes 3 

 mm. long, smooth, equal ; lemma smooth, 2 mm. long, 

 the deciduous straight awn about 4 mm. long. 



Introduced in a few localities in California (Cahto, Santa 

 Barbara, Los Angeles). Ai)r.-May. Type locality, Euro- 



9 



pean. 



2, Oryzopsis hendersoni Vasey. 

 Henderson's Mountain-rice. Fig. 292. 



Oryzopsis hendersoni Vasey, Contr. U. S. Nat. Herb. 1: 267. 1893. 



Culms densely cespitose, scabrous, 10-40 cm. tall; 

 sheaths scabrous, the basal pale, glabrescent ; ligule very 

 short; blades mostly basal, involute, scabrous, firm, 

 about 1 mm. wide when unrolled, mostly less than 10 

 cm. long, the culm blades single, 4-5 cm. long ; panicle 

 rather few-flowered, 5-10 cm. long, the branches distant, 

 stift', scabrous, appressed or ascending, spikelet-bearing 

 toward the end, the lower as much as 8 cm. long; glumes 

 abruptly acute, 5 mm. long ; lemma about as long as the 

 glumes, glabrous, the awn very deciduous, nearly straight, 

 5-10 mm. long. 



Only known from the type locality, "in Washington," and from 

 the Ochoco National Forest, Oregon, at 4800 feet altitude. 



3. Oryzopsis exigua Thurb. 

 Little Mountain-rice. Fig. 293. 



Oryzopsis e.xigua Thurb. in Wilkes U. S. Expl. Exped. 17: 481. 

 '1874. 



Culms densely cespitose, scabrous, stiffly erect, 15-30 



cm. tall; sheaths smooth or somewhat scabrous; ligule 



2-3 mm. long; blades involute-filiform, stiffly erect, 



scabrous, 5-10 cm. long, the culm blades about 2, the 



upper mostly 3-4 cm. long; panicle narrow, 3-6 cm. 



long, the branches appressed, the lower 1-2 cm. long; 



glumes abruptly acute, 5 mm. long ; lemma appressed- 



pilose, about as long as the glumes, the awn about 5 



mm. long, untwisted, once-geniculate. 



Dry open ground or open woods, Hudsonian and Alpine Zones; 

 high mountains of Washington (Mount Adams) and Oregon, to 

 Wyoming. June-Aug. Type locality : Cascade Mountains, Ore- 

 gon. 



