graminejE. 495 



5. Elymus dasystachys, Trin. 



Elymus dasystachys, Trin. in Ledeb. 111. t. 249 ; Ledeb Fl Alt 4 p 333 

 K mollis, R Brown in Frankl. Journ. ed/2, App. p. 3. 



Hab. Walla- Walla, Oregon.— This is a much smaller plant than 

 the preceding species, and abundantly distinct from it in its subulate, 

 almost setaceous glumes. 



6. Elymus condensatus, Presl, I c. 

 Hab. North branch of the Columbia, Oregon. 



7. Elymus Sitanion, Ecem. & Schult 



Elymus (/) Sitanion, Eoem. & Schult. Mant, 2, p. 426; Watson in Bot. King 



Eep. p. 391. 

 Sitanion Elymoides, Kaf. in Jour. Phys. 89, p. 103. 

 JEgilops hystrix, Nutt. Gen. 1, p. 86. 

 Polyantherix hystrix, Nees in Tayl. Ann. Nat. Hist. 1, p. 284. 



Hab. California and Oregon.— This extremely variable grass has, 

 as the synonymy shows, long been a puzzle to botanists. Many years 

 ago Mr. Bolander called our attention to Californian specimens which 

 could not be separated from Elymus, and we are glad that Watson 

 has .restored it to that genus, of which it is at most a subgenus. Like 

 most of the grasses of wide geographical range, it varies much as to 

 foliage, length and rigidity of awns, &c. The fragile character of the 

 rachis and the readiness with which the spike is broken into frag- 

 ments make it a troublesome plant to the collector. 



N 



