49 



Triticum aestivum L. ^ Wheat).— Some specitnenH found iu an old stock yard. 

 Grand Encampment Creek, August 13 (3984). 



Hordeum jubatum L. (Squiruel-tail grass).— More or less abundant throughout 

 this entire range. 



Hordeum occidentae Scribn. — Slender stemmed, 12 to 18 inches higli; leaves 

 abundant; spikes slender, with awns of moderate length. It forms a uniform 

 growth but rather open sod, in which it differs from the preceding, which is 

 usually found in tufts or bunches. This would have forage value of no mean 

 degree except for the awns, which are said to make it objectionable. North 

 Vermilion Creek, July 20 (3781). 



Hordeum nodosum L. (Meadow Barley).— Wagon Hound Creek, August 21 (4099). 



Elymus ambiguus V. & S.— Slender, rather rigid leaves and stems, 12 to 18 inches 

 high; spike narrow, 3 to 6 inches long, inclined to have an interrupted appear- 

 ance; awns very short. Neither common nor abundant, collected but once, on 

 the alkali flats bordering the banks of Hams Fork. Granger, September 1 (4451). 



Elymus canadensis L. (Wild Rye).— Tall and somewhat coarse, 3 to 5 fee.t; stems 

 Jeafy ; spikes dense, 4 to 8 inches long, bearded. This well-known bunch grass 

 is confined to the drier regions of the eastern part of the State, where it is of 

 frequent occurrence and often abundant. Pine Bluffs, July 6 (3637). 



Elymus condensatus Presl. (Giant Rye-grass).— A tall, smooth, coarse grass 

 forming innuenso clumps. The most conspicuous grass throughout the entire 

 southwestern part of the State. North Vermilion Creek, July 23 (3829). 



Elymus glaucus Buckl. — This rye grass seems to belong to the wooded areas, 

 occurring as scattering specimens or in small bunches in aspen thickets or 

 among the fallen timber on wooded slopes. Battle Lake, August 16 (4016); 

 Medicine Bow River, August 21 (4085) ; Cooper Hill, Aiigust 21 (4413). 



Elymus macounii Vasey.— A bunch grass of much promise; my field notes make 

 special mention of its abundance of soft, excellent leaves. It rarely occurs as an 

 open, continuous sod on bottom lands or in the draws among the hills. Pine 

 Blufts, July 6 (3624); North Vermilion Creek, July 20 (3783). 



Elymus occideutalis Scribn. (Western Rye-grass).— Tall and slender stemmed, 

 3 to 4 feet; spikes short, pubescent, awns of moderate length. Probably rare, 

 only one small patch of it observed; on the dry terraces separating the first and 

 second liottom lands. Laramie River, September 15 (4470). 



Elymus simplex Scribn. (fig. 21).— A stilf, harsh perennial, 1 to 2 feet high; spikes 

 slender, inclined to appear interrupted, 3 to 5 inches long. But little of it 

 observed, and that growing iu small bunches on the grassy banks of an irri- 

 gating canal. Little Laramie River, July 4 (3335;. 



Sitanion elymoides Raf. (Long-bearded Wild Rye.)— This Inmch grass differs 

 much in appearance and size in different habitats. On the dry saline plains of 

 the desert it forms low, compact bunches and the spikes have awns of moderate 

 length; on moist mountain slopes the bunches arc loose, the stems long and 

 spreading, the spikes loose, and the divaricate awns of inordinate length. In 

 any case it can not be looked upon with any favor as a forage plant. Pine Bluffs, 

 July 6(3608); North Vermilion Creek, July 20 (3784); Woods Creek, August 9 

 (3952). 



SEDGES. 



Eleocharis palustris (L.) R. & S. (Common Spike-rush.)— Slender stemmed and of 

 very close compact growth, 10 to 15 inches high. This species occurs In very 

 many boggy places as a pure growth and in over-irrigated meadows it often 

 constitutes a large percentage of the crop that is put up and labelled hay. Some 

 forage value it no doubt has, but it is to be regretted that the better true grasses 

 should be drowned out only to be replaced by this. Centennial Valley, July 4 

 (3329) ; Pine Bluffs, .July 7 (3656) ; North Vermilion Creek, July 19 (3764) ; Evans- 

 ton, July 27 (3833). 



3018— No. 13 4 



