56 



Growing with E. mollis and other grasses :it Homer, Alaska, (No. 471. Walter Evans, 

 ,1 Illy 27, lJ^rt7). 



This striking species is remarkahle i'or its thick spikes, which are -^ to 4 cm. in 

 diameter. The culms art; not so tall as those of E. mollis growing with it; the 

 spikes are shorter and much thicker. The glumes in E. mollis are pubescent 

 with rather long, soft hairs, while the glumes of E. caintatas are covered with 

 a very short and close puliescencc, which is only visible under the lens. There 

 is a variety of K. mollis {E. mollis hrevispicus Scri1)n. A- Smith) irom St. Lawrence 

 Bav which has something of the habit of E. cajiitaliis, but the spikes, whilp 

 only 7 to 10 cm. long, are not so thick, and tlie glumes are rather densely 



clothed with a long i)ube8cence very 

 unlike that of E. capiiaius. 



ELYMUS HANSENI Stribn., sp. n. 



(Fig. 12.) 

 A rather stout, glabrous perennial 9 to 12 

 dm. high, narrow, spreading haves and 

 slender, fragile spikes 5 to 8 cm. long. 

 Sheaths smooth, striate. Lignle very 

 short, hardly 1 mm. in length, entire. 

 Leaf-blades 10 to oO cm. long, 2 to ."> 

 mm. wide. Internodcs of the axis of 

 the spike al)out 1 cm. in length. Spike- 

 lets 3- to 5-flowered, about 1.5 mm. long, 

 exclusive of the awns. Empty glnmes 

 lanceolate, strongly nerved, tipped 

 with 2, sometimes 3, unequal awns; 

 the longer awns of the empty glumes 

 about 3..5 cm. long. First dowering 

 ghiuie 10 to 12 mm. long, entire or 

 2-toothed at the apex, terminating in 

 a straight and very slender awn about 

 .5 cm. long. Palea abont the length of 

 the glume, minutely scabrous on the 

 sharp keels except near the base, 

 slightly pubescent at the truncate or 

 2-toothed apex. 

 Dry, open ground, agricultural station in 

 Amador County, Cal. (No. 1742, (jieorge 

 Hansen, .June 17, ISOfi). Allied to 

 Sitaiiion eliinioidcs, but is a much taller 

 grass with narrower leaves, more 

 slender spikes, larger spikelets, broader 

 empty glumes, and awns not divergent. 

 The palea is also much broader at the 

 apex and not awned. 

 ELYMUS SAXIC'OLUS Scribn. iV- 



Siiiith, s]t. n. (I'l. \y.) 

 A rather slender, wiry, densely ca'spitose 

 perennial aljout ."> dm. high softly pubescent sheaths and leaves and fragile 

 spikes, .5 to 10 cm. long. Culms pubescent excepting where covered by the 

 leaf-shciiths. Sheaths pubescent. Lignle very short, scariou.s, auricled. Leaf- 

 blades 10 to 20 cm. l(»ng, the uppermost .5 to era. long, long attenuate-pointed, 

 3 to 4 mm. wide or less, strongly striate above ami pubescent on both sides. 

 Axis of the panicle stiongly compressed, r.'adily breaking u]>. Spikelets solitary 

 or in ])air8, 2- to .".-llowerod, about 1.5 cm. long exclusive of the awns. Outer 

 gluuies narrowly lanceolate, 1- to :!uerv<"d, about (! mm. long. Awn slender, 



Flii. 12. — Elj/inus liansriii Scrilin.: n, empty 

 gluiiU!«; h, spikelot with the empty ghuiics :iiiil 

 awuH removed. 



