34 



summits and ridges, sometimes in sufficieut abundance to constitute an appreci- 

 able part of the forage. Head of Pole Creek, July 22 (3431). 

 Phleum alpiuum L. (Alpine Timothy).— Very similar in general appearance to the 

 ordinary field timothy, except that it is somewhat smaller. Il is found on moist 

 slopes and in the valleys at 8,000 to 11,000 feet, often constituting a large per- 

 centage of the most valuable forage. Beaver Basin, July 22 (3816) ; Battle Lake 

 Mountain, August 17 (4050). 

 Alopecurus geniculatus fnlvus Scribn. (^Maksh Foxtaii,).— A succulent grass with 

 an abundance of soft leaves, forming small, usually decumbent bunches, stems 



12 to 20 inches long. It fre 

 quents wet ground, especially 

 creek banks and shallow 

 stream beds, Avhere it forms 

 tufts among the cobblestones. 

 It is relished by stock, 

 though it is probably rather 

 watery in its composition. 

 Little Laramie River, July 4 

 (3334) ; Willow Creek, July 13 

 (3379) ; Beaver Basin, July 22 

 (3812) ; Johnson's Ranch, Au- 

 guj,t 9 (3908). 

 Alopecurus occidentalis Scribn. 

 (Mountain Foxtail, tig. 5).— 

 A valuable grass in the moun- 

 tain meadows and parks. Bat- 

 tle Lake, August 10 (4017). 

 Sporobolus airoides Torr. ( Fine- 

 top Salt-gi:as8, lig.fi). — This 

 grass forms large mats or 

 sometimes considerable areas 

 of harsh, raised sod, the 

 short, stiff root-leav(!S and 

 wiry stems giving it a disa- 

 greeable feeling to the touch ; 

 1 to 2 feet high, producing a 

 large, widely spreading pan- 

 icle. In spite of its stiffness, 

 on the open bottom lands 

 stock keep it well eaten 

 down, and it is difficult to 

 find fruited specimens. Little 

 Laramie River, July 24 (.34.52) ; 

 Tine Bluffs, July 7 (3619); 

 Granger, July 30 (3877). 

 Sporobolus asperifolius Thurb. (Rough-leafed Salt-gijass, tig. 7).— Harsh but 

 sleiulor leaves and stems; 9 to 15 inches high, the numerous capillary i)edice]s 

 of the panicle widely spreading. Probably of little value, though it may furnish 

 some of the summer pasture on tiio bottom lands where it occupies the drier 

 knolls, or more rarely is intermingled with other grasses on the lower, moist 

 ground. Granger, July 30 (3876 and 3889). 

 Sporobolus coufusus Vasey (fig. 8).— A small form growing in little tufts, the 

 stems and leaves almost hairlike, and the delicate panicle widely spreading, 3 to 

 t) inches high. \ot oliserved except on stony or gr.ivelly stream banks, where 

 it forms a scattering, inconspicuous growth. Laramie h'iver, July 12 (3361); 

 Grand Encampment Creek, August 13 (3990). 



Fig. 5.— Mountain Foxtail {Alopecurus occidenlalig) : a, 

 spikelet; 6, fioret. 



