﻿S TO WESTERN BOTANY. 725 



Stipa arida. With the habit and general appearance 

 of S. viridula, also leaves and ligules; sheaths as long or 

 longer than the internodes; rays in fives below, very 

 short or almost none, appressed, with 3-4 spikelets, fili- 

 form, the whole, exclusive of the awns, being 1' or less 

 long; outer glume lanceolate -acuminate, 4" long, very 

 thin and hyaline, 3-nerved; inner glume 3" long, nar- 

 rower and acuminate, 3-nerved; flowering glume 2" long, 

 fusiform, very narrow, glabrous above and shortly-pubes- 

 cent below; awn 2-3' long, thread-like, flexuous but 

 hardly geniculate, smooth; panicle 6' long, hardly ex- 

 serted, dense, wand-like. 



No. 5377. Marysvale, Utah, on very dry talus slopes 

 in shingle, 6000 alt., June 4, 1894. 



Elymus salina. With the habit of Sforobolus a/roides, 

 but culms very different; forming coarse and very close 

 tufts, 1-2 in diameter; stems much thickened below the 

 fibrous leaf-sheaths, perennial, erect, 1-2 high; lower 

 leaf-sheaths loose and somewhat enlarged, very coarsely 

 nerved, nearly smooth, about half as long as the nodes; 

 ligule abortive; leaves pubescent on the under side, es- 

 pecially so at the throat, thick, involute, acute, linear, 4-6' 

 long (the root leaves), stem leaves 2-4' long, nodes about 

 3 ; inflorescence a simple, loose spike like Agropyritm gla il- 

 eum which it much resembles; spikelets single at each 

 joint, barely contiguous, placed flatwise to the rachis, 

 6-10; empty glumes 2, subulate, pungent, 2" long, gen- 

 erally falcate, i-nerved; spikelet pediceled, pedicel about 

 J" long and very thick and stout, often very short; spike- 

 lets about 6" long, 2" wide and 1" thick, 7-9-flowered; 

 flowering glume ovate-lanceolate, shortly acuminate, about 

 4" long, thick, indistinctly 5-nerved, smooth and rounded, 

 with narrow, hyaline, slightly lacerate margin; palet 2- 

 nerved, concave in the middle and with broad hyaline 



