56 



pasture grasses, and would probably be of value as a meadow grass, especially 

 where the soil and the irrigatiou waters are not of the best. Black liock 

 Bntte, July 13 (3721). 



Poa laevigata Scribn. (Smooth Bunch-grass). — ^This species is found throughout 

 the southern ]tart of the State, in the desert as well as in the hills and moun- 

 tains, sometimes in comparatively dry places, l)ut preferring moist banks and 

 wet Hats. It forms a valuable part of the early summer forage. Red Desert, 

 June 3 (3118); Pole Creek, June 19 (3197); Wamsutter, July 10 (3668): Bitter 

 Creek, July 12 (3708); Point of Rocks, July li (3751). 



Poa lucida Vasey (Shixixg Buxch-grass. )— A grass of more than usual importance. 

 It grows to a height of 1 or 2 feet, producing numerous stems and broad 

 leaves of excellent quality. It constitutes an api>reciable part of the forage in 

 the desert as well as in the summer range. It is found on the dry plains, but is 

 more abundant and luxuriant in the vicinity of spring bogs and creeks. Point 

 of Rocks, June 1 (3093) ; Bitter Creek, July 12 (3707) ; South Butte, July 13 (3733). 



Poa sheldoni Vasey (Sheldon's Blue-grass).— Bitter Creek, July 12 (3696). 



Puccinellia airoides Wats. & Coult. (Alkali Meadow-grass).— This slender, erect 

 o-rass is seldom seen except in the margins of ponds and ditches, and seems to 

 prefer water with a considerable percentage of alkali. Whether it could be 

 introduced to advantage on wet alkali groun<l the writer is unable to say. but 

 that stock will readily eat it when fresh is well known. Bitter Creek July 12 

 (3687); Black Rock Springs, July U (3715); South Butte, July 14 (3737). 



Agropyron dasystachy-um siibvillosiim S. & S. (Northf.i:x Wheat-grass).— An 

 erect grass with slender heads and numerous slender, somewhat spreading root- 

 leaves. On the dry plains it is of small size (6 to 10 inches high), but on bottom 

 lands or under irrigation it makes a luxuriant growth. It cures readily on the 

 ground and forms a valuable part of the winter pasture and must also be reck- 

 oned among the valuable meadow grasses. Wamsutter, July 9 (3679); Fifteen- 

 Mile Springs, July 14 (3730). 



Agropyron spicatum S. «S: S. (Westerx Wheat-grass).— A somewhat coarse and 

 harsh wheat-grass but nevertheless of much value ; not abundant in the desert 

 but in some of the draws in sufficient amount to possess forage value. Wam- 

 sutter, July 10 (3672) ; Black Rock Butte, July 14 (3724). 



Agropyron spicatum molle S. & S. — This seemed to be the commonest of the wheat 

 grasses in some parts of the desert, as, for instance, in the clay gumbo on the 

 banks of Bitter Creek. It impresses one as a grass that wonld be of value in 

 meadows where soil and irrigation water are both of poor (piality. Wamsutter, 

 July 10 (3674); Bitter Creek, July 12 (3706); Point of Rocks. July 12 (3713). 



Agropyron tenerum Vasey (Slender Wheat-grass).— A slender-stemmed grass 

 with very slender heads and rather sparsely leaved, from 15 to 30 inches high. 

 Probably the most important wheat-grass in southern Wyoming. Bitter Creek, 

 July 12 (3709); South Butte, July 13 (3736). 

 Agropyron tenerum ciliatum S. & S.— In general appearance and in value much 

 like the preceding but of rarer occurrence; hence among the native forage of 

 little importance, though under cultivation and irrigation it has proved a most 

 desirable form. Wamsutter, July 11 (3677). 

 Agropyron vaseyi S. &, S. (Vasey's Wheat-grass). — This forms dense bunches of 

 some inches or even a foot in height. It will hardly be thought of as a wheat- 

 grass on account of the numerous spr<'ading awns, but it is a valuable grass on 

 account of the early forage it furnishes on otherwise barren slopes and shaly 

 hilltops. Stock eat it readily, especially while it is young. Bitter Creek, July 

 12 (3695). 

 Hordeum jubatum L. (Squirrel-tail grass).— This, so commonly called fox-tail 

 in this region, is too well known to need any description. It is the most unde- 

 sirable grass of the West. Though considered an annual, it will probably be 



