50 



Eleocharis sp. (?). — Erect and close growing, the stems slender, 5 to 8 inches high; 

 spike short, oblong. Common on the marshy banks of the streams and ponds. 

 Pine Bluffs, May 15 (2899;. 



Scirpus campestris Britt. (Prairie Rush). — Stems triangular, stout and very 

 leafy, 1 to 2 feet high; leaves broadly linear, flat, nearly eiiualling the stems; 

 perennial from tubers borne at the end of short horizontal rootstocks, the annual 

 stems arising from the previous year's tubers. The species seems able to endure 

 any amount of alkali, as it was found in dry alkali-lake beds where no other 

 vegetation seemed able to exist. Granger, July 30 (3871); Laramie, August 30 

 (4462). 



Scirpus americaiius Pers. (American Rush).— Long, rather slender triangular 

 stems; spikelets small, clustered capitate, overtopped by the single involucral 

 leaf. A common rush in most of the bogs of the region, but especially so in the 

 saline bogs and marshes adjaceut to IJitter Creek, in the desert. I'iue Bluffs, 

 July 7 (3650) ; Laramie, August 30 (4468). 



Scirpus lacustris L. (Great Bulimsu). — Stems stout, cylindrical, smooth, and 

 erect, spikelets umbellately clustered. JJardy wholly absent from fresh-water 

 bogs throughout this range. Pine Bluffs, July 7 (36r)l) ; North Vermilion Creek, 

 July 17 (3767). 



Scirpus microcarpus Presl. (Small-iruitei) Bulrush).— Krect, 3 to 4 feet high; 

 leaves abundant and large; spikelets very numerous in an open inlloresence 

 which approaches a compound umbel. This species prefers fresh-water ponds or 

 the banks of slow flowing streams. It occurs in some abundance in many of the 

 wetter meadows, where it constitutes a iierceptible part of the hay i)rodu(t. 

 Woods Landing, August 7, (3911): Grand Encampment, August 13 (407S). 



Carex acuta tenuior Bailey. — A species of sedge with very slender leaves and 

 stems, 9 to 15 inches high, growing in almost unbreakable clumps on the mar- 

 gins of lakes and ponds. Infrequent; Battle Lake, August 16 (4039). 



Carex athrostachya Olney. — A slender stemmed sedge producing an abundance of 

 excellent leaves, a valuable ingredient in many wet meadows. Centennial ^'aI- 

 ley, July 2 (3280) ; Wood's Landing, Big Laramie Kiver, August 7 (3898) ; Grand 

 Encampment, August 13 (4000); Medicine Bow River, August 21 (4092). 



Carex atrata L. (Black Sedge). — Another sedge with long, slender stems and 

 numerous broad root-leaves about half the length of the stem. It forms only a 

 scattering growth among the rocky ledges in subalpine regions. Battle Lake 

 Mountain, August 17 (4065). 



Carex aurea Nutt. (Golen-fruited Seuge). — A small form, from a few to several 

 inches in height, llexuous stems and ilat, light-green leaves, occurring about 

 springs and in wet meadows, but rarely in suflicieut amount to have any eco- 

 nomic significance. Evanston, .July 28 (3854). 



Carex deflexa media Bailey (Northern Skdce). — This forms close units, some- 

 times of great size; the leaves are especially numerous, and though it rarely 

 exceeds inches in height it has the appearance of being one of the best pasture 

 grasses of the higher slopes and ridges in our mountains. Battle Lake Mouu tain, 

 August 17 (4016). 



Carex douglasii Boott (Douglas's Sudoe).— A low eaespitose form that deve]o|.s 

 early, usualy only a few inches high, but at maturity as much as ;i foot high in 

 some, localities. The heads are large and the leaves of excellent (juality. It 

 is an important ])art of the pasture in some of the localities investigated. Evans- 

 ton, May 29 (3017); Laramie River, June 18 (3188); Centennial Valley, July 3 

 (3288); Wagon Hound Creek, August 21 (4402). 



Carex fe.stiva stricta Bailey. — This tine looking sedge prefers wet ])laces, especially 

 pond and creek 1)ank8. It produces an abundance of excellent leaves and is no 

 doubt readily eaten by stock. As an admixture in wet meadows it would be of 

 value. Green Top, June 29 (3255); Head of Vermilion Creek, July 20 (3701); 

 Evanston, .luly 28 (3862). 



