Vol.1] Hall. — Botanical Survey of Sa7i Jacinto Mountain. 57 



several plants can be considered as distinct species seems 

 doubtful, but, for the present at least, it is desirable to maintain 

 them in this rank until we know more about their local variation 

 and distribution; their distribution appears to coincide with 

 well-marked phytogeographic lines. 



Distichlis spicata fL.J Greene, Bull. Calif. Acad. ii.4ir).(?) D. 

 marhima Raf., of Bot. Calif. 



The salt grass so common in parts of Thomas valley is proba- 

 bly to be referred to this species, but it was not collected in 

 flower. 



Elymus glaber {J. G. S^nith) Davy, comb. nov. Sitanion 

 glahrum J. U. Smith, U. S. Dept. Agr. Agros. Bull, xviii. 

 14 (189}»). Orchard Barley. 



This is an important grass of the drier meadows of Round 

 Valley where it was collected at altitudes of 8300-9000 ft. (Nos. 

 2501, 2601.) 



Elymus glaucus Buckl. 



This Elymus is very common in the drier meadows and along 

 the streams from 5200 to over 9000 ft. alt. It is exceedingly 

 variable and passes from the tj'pical form, represented by such 

 specimens as nos. 2269 and 2207, through such intermediate forms 

 as nos. 2455 and 2515 directly over into the variety maxinius. 

 The variation is probably due to the effect of the difference in 

 the light and moisture conditions, since the variety and the forms 

 approaching it were collected only along streams and in deep 

 canons, while the species is more common on the open and some- 

 what sandy benches. 



Elymus glaucus maximus Bat't/, in Jepson, Fl. Mid. W. 

 Calif. 79 (1901). 

 Dark Canon at 6000 ft. alt. (No. 2246.) 



The latitudinal range of this variety has been greatly extended 

 by its recent collection in Alaska, according to Mr. E. D. Merrill. 



Elymus multisetus fJ. G. Smith) Bavy, comb. nov. Sitanion 

 multisetum J. G. Smith, U. S. Dept. Agr. Agros. Bull, xviii. 

 11 (1899). 



Bot.— 5. 



