26 
the river, July 18, small form, 445, and 2209, like 456; Logan, near Gallatin 
River, scarce, a slender, rather lax, bright-green form, July 27 (2263); Lima, a 
form much like 2263. 
E joe er Canyon, August 9, 593, a slender, narrow-leafed form with open pani- 
4, 584, like 445, on the margin of a mountain brook; 576), scarce, in 
date woods, like 2257, but more leafy. 
Agrostis humilis Vasey. 
Colorado: Silver Plume, mountain side, August 24 (2456). 
Agrostis rubra Linn. ? 
Colorado: Silver Plume, rare on the sides of the gulch, August 21 (2425). 
Agrostis scabra Willd. 
Colorado: Georgetown, frequent in the mountains, August 17 (613, 2392). 
Montana: Gallatin, very common in wet pepe near the river, July 29 (2288); 
Manhattan, common in low meadows, e places constitutes quite a large 
portion of the hay, July 17 (407, 423, 2129); F "Helena, railway embankments near 
the Warm Springs, July 13 (2142). 
Idaho: Beaver Canyon, near small stream in the canyon, August 7 (2337). 
Agrostis scabra Willd.? 
Resembling a large form of 4. scabra, tall, leafy, with wider leaf blades and larger 
panieles, the spikelets like 4. scabra, but the flowering glume awned. 
Colorado: Idaho Springs, common in the canyon, August 27 (737, 2485, 2487). 
Montana: Bozeman, common in meadows, an excellent hay grass, July 22 (457, 2218, 
2221); Townsend, banks of the Missouri River, July 15 (2151); Logan, common, 
shady river banks, July 29 (510). 
Calamagrostis canadensis (Michx.) Beauv. 
Colorado: Georgetown, margin of Clear Lake, August 17 (611, 2375); Idaho Springs, 
shady bank of mountain stream, August 27 ( t). 
Montana: Helena, among bushes, July 12 o e Manhattan, frequent in moist 
thickets, an excellent hay grass, July 17 (417), with ligule much elongated; 
Logan, common along the Madison viva: July 28 (579, 2278). 
Calamagrostis canadensis acuminata Vasey. 
Spikelets 13 to 2 lines long; empty glumes, sharply acuminate. Approaches C. 
angsdor ffi. 
rends: Georgetown, common, in wet places, August 17 (615 
Montana: Manhattan, common on the river bank, a good ju grass, July 17 (419, 
42. "Tap. 
Idaho: Beaver Canyon, common, August 7 (2328). 
Calamagrostis scribneri Beal, Grass. N. Am. 2: 343 (C. dubia Seribn., not Bunge). 
Colorado: Idaho Springs, frequent along shady brooks, August 27 (728). 
Calamagrostis inexpansa A. Gray 
Differs from C. americana Seribn. chiefly in its flat or less strongly involute and less 
rigid leaves, and its less rigid culms. 
Nebraska: Central City, banks of Platte, not abundant, June 19(266,2008); North 
Platte, frequent, blades more involute, June 21 (275). 
Colorado: Georgetown, frequent along the edge of Clear Creek, August 19 (646). 
Calamagrostis macouniana Vasey. 
Montana: Manhattan, in thickets near the river, a ees hay grass, d 17 (422, 21913), 
panicle larger and awns shorter than in the type 
Calamagrostis neglecta G:ertn. 
Colorado: Georgetown, frequent along Clear Creek, August 17 (618). 
ot SS OA ió 
