AGKOSTIDE^. 221 



partiall)'' included, open, thin, 10-20 cm. long, rays very slender, 

 mostly in pairs, the longest 10 cm. long, flower-hearing along the 

 upper hall*. Empty glumes purplish, acumiiuite, 3-nerved, first 8— 

 10 mm. long, second G-8 mm. long; floret pubescent, bearing a- 

 short awn, crown of hairs 5-6 nun. long, including the short sharp 

 callus, and the crown; palea one-third as long as the glume, awn 

 slender, scabrid, Ijent once or twice near the middle, 25 mm. long. 

 Stamens 3, anthers pencil-tufted. Some authors say '' Stamen 1." 



California (Passadena), Jones 354:-±. 



Found in Arizona and California. 



Yar. Anderson! Vasey, Contrib. U. S. Nat. Herb. 3: 54 (1892). 



Culms more slender, blades narrower, j)anicle smaller, much 

 exserted, 5-12 cm. long, longest rays 4 cm. long; empty glumes 6-8 

 mm. long. The plants seen were from F. L. Scribner's herbarium,, 

 collected in California by Anderson and presented by Dr. Vasey. 



16. S. stricta Vasey, Bull. Torr. Club, 10:42 (1883). 



An erect slender grass, 20-40 cm. high. Sheaths longer than 

 the internodes, the upper one dilated; ligule very short; blades 

 narrowly involute, those of the sterile shoots extending nearly ta 

 the panicle, those of the culm 3-4 in number. Panicle strict, nar- 

 row, partially included by the upper sheath, 8-20 cm. long, lower 

 rays in twos or threes. Empty glumes thin, narrowly lanceolate,, 

 acuminate, 3-nerved, subequal. 10-13 cm. long; floret pubescent,, 

 about 6 mm. long, including the callus and the very short 2- 

 toothed apex, awn twice bent, 30-40 mm. long, pubescent to the 

 second bend, 1-3 mm. long. 



Washington, Suksdorf 285. 



Washington to California and Nevada. 



l)i'. A'asey observes that " It has been mistaken for Stipa occi- 

 (le)it(dis, which has longer plumose awns, 5-nerved glumes, a con- 

 spicuous ligule, and a shorter looser panicle. It has shorter more 

 slender culms, narrower glumes, and shorter awns than S. virichda." 



17. S. viridula Trin. Bull. Sc. Acad. St. Petersb. 1 : 67 (1836). 

 S. parviflora Nutt. S. Bloomer I Boland. Proc. Calif. Acad. 4:168 

 (1870). S. spartea Hook. Fl. Bor. Am. 2:237 (1840), not Trin. 



Culms stout, strict, simple, 40-70 or even 150 cm. high. 



