82 



but from its spare yield can hardly obtain mnch favor for a hay 

 crop. 



14:. P. debilis, Torr. Lower Canada, New England, New York to 

 Wisconsin. 



15. P. Donglasii, JYees. California. 



16. P. Eatoni, S. W. Utah, Nevada, and Montana. 



17. P. flavicans, Ledb. Alaska. 



18. P. flexuosa, JLuhl. Pennsylvania to Texas. 



P. flexuosa,? var. occidentale. Colorado, Utah, and Nevada. 



19. P. glumaris, Trin. Alaska to Lower Canada. 



20. P. gracillima, Yasey. Oregon and Washington Territory. 



21. P. Howellii, Vasey and Scribner. (P. trivialis, var., Vasey.) 



Oregon. 



22. P. Kelloggii, Vasey. (4705, inlander.) California. 



23. P. Kingii, S. W. Utah and Nevada. 



24. P. lsevis, Vasey. (P. tennifolia, var. lsevis, Vasey.) Colorado 



to Montana. 



25. P-. laxa, Hcenke. New England to Pocky Mountains. 



26. P. leptocoma, Trin. Alaska. 



27. P. nemoralis, Linn. Pocky Mountains and Xew England. 



28. P. Xutkaensis, Presl. Alaska. 



29. P. Nevadensis, Vasey. Utah, Nevada, Montana to Oregon. 

 P. Nevadensis, var. glauca, Scrib?ier. Montana 'to Oregon. 



30. P. occidentalis, Vasey and Scribner. Oregon. 



31. P. pauciflora. (Atropis panciflora, Thurb.) California. 



32. P. pratensis, Linn. June grass, Kentucky Blue grass, Spear 



grass. Introduced and cultivated, but undoubtedly indig- 

 enous in the Pocky Mountains. 

 This grass is too well known to need an extended description. It 

 is a perennial, growing usually 1\ to 2 feet high, with an abundance 

 of long, soft, radical leaves. There are several well-marked varie- 

 ties, which are much modified and improved by good cultivation. 

 It is indigenous in the mountainous regions of this country as well 

 as of Europe, and has been introduced into cultivation in many 

 countries. The panicle is generally pyramidal in outline, 2 to 4 

 inches long, open and spreading, the branches fine, mostly in fives, 

 the lower ones 1 to 2 inches long, subdivided and flowering above 

 tlie middle. The spikelets are about two lines long, ovate, closely 

 three to five flowered, mostly on very short pedicels. The outer 



