650 POACEiE. 



4. E. innovatus n. sp. 



A rather slender perennial, 60-70 cm. liigli, from creeping- 

 rootstocks. Sterile shoots abundant, blades 20-30 cm. long, 2-^ 

 mm. wide, scabrous, fiat or involute, leaves of the culm 3 in num- 

 ber, sheaths shorter than the internodes; ligule very short; blades 

 4-10 cm. long. Spike erect, slightly exserted, 7-10 cm. long. 

 Spikelets puberulent, 2 at a joint, 3-4-flowered, 15 mm. long; 

 empty glumes mere bristles, 4-12 mm. long; floral glume oval- 

 lanceolate, 8-9 mm. long; palea as long as its glume. 



Montana (north fork of the Sims River in 1887), R. S. 

 Williams. 



5. E. triticoides Buckl. Proc. Acad. Phila. 99 (1863). E. 

 Orciittiamis Ysisej, Coult. Bot. Gaz. 10:258 (1885). 



Eootstocks at least sometimes present. Culms rather slender, 

 60-100 cm. high, nodes 3-5. Ligule very short; blades 15-25 cm. 

 long, erect, narrow, often involute, smooth or scabrous, the upper 

 equalling or exceeding the culm. Spike 7-15 cm, long, erect, loosely 

 or rather closely flowered. Spikelets 2, sometimes 3 or only 1 at a 

 joint, 4-8-flowered, sometimes glaucous; empty glumes equal, linear- 

 lanceolate, rigid, long-pointed, 6-10 mm. long, about as long as 

 the floret; floral glume firm, lanceolate, acuminate or short-awned, 

 nerves indistinct below, 7 above. 



A'ery near to Agropyron, for which it would pass in cases where 

 this jilant is slender and has 1 spikelet at a joint. B. OrcidUanus 

 Vasey is a slender or small form of the above, and perhaps even that 

 passes insensibly into E. condensatus, which see for a full account. 



Washington, SuLsdorf 2124=; Oregon, Howell; Calif ornia, PansA 

 1162, 1162 A, Orcutt ; Arizona, Rushy 909|, Pringle, Tourney 

 750, 762. 



Rocky Mountains, Colorado, Oregon, and California. 



6. E. condensatus Presl, Keliq, Hajnk. 1 : 265 (1830). Giant 

 Rte-ghass. 



Culms in dense tufts, stout, reed-like, 1-4 m. higli. Ligule 

 very short, auricled ; blades flat, smooth, often glaucous, 2 cm. or 

 more wide. Spike 15-40 cm. long, compact or interrupted, bear- 

 ing branching clusters of spikelets at each joint. Spikelets 3-6- 



