(153) 
lateral nerves on each side very obscure, acute in side view, 
oblong-lanceolate and about 0.8 mm. wide; palet faintly 
2-nerved, strongly hispidulous, usually about equalling the 
scale; stamens 3, oblong-linear, about 2 mm. long; stigmas 
2, plumose. 
Type collected by R. S. Williams on mountain side at 
Dawson, July 14, 1899. Also obtained at Cumberland 
House, on the Saskatchewan River, in the Lake Winnipeg 
region, and communicated to Torrey by Hooker, and bear- 
ing the number 105. Resembling A. arundinacea (Trin.) 
Beal in the bracts at the base, but it is a taller and much 
rougher plant with a more contracted panicle and smaller 
spikelets. 
Agrostis hyemalis (Walt.) B.S.P. Dawson, August 13 
and 23, 1899 (Williams), referred for the present to this 
complex species. 
CALAMAGROSTIS ATROPURPUREA Nash, sp. nov. 
A tall perennial with a rather stout long rootstock and deep 
purple contracted panicle. Culms 8-12 dm. tall, erect, 
smooth, or a little roughened just below the panicle: leaves 
about 5; sheaths striate, somewhat roughened, especially to- 
ward the apex, rather loosely embracing the culm; ligule 
scarious, about 5 mm. long; blades erect, flat, strongly rough- 
ened, long-acuminate, 1-2 dm. long, 3-5 mm. wide: panicle 
contracted, about 1 dm. long, its branches and their divisions 
extremely hispidulous, erect, the larger ones 2-4 cm. long, not 
spikelet-bearing below: spikelets numerous, 3.5 mm. long, 
lanceolate, acute; empty scales strongly strigose, deep 
purple, acuminate, rounded on the back, the first scale 1- 
nerved, equalling or slightly longer than the 3-nerved second ; 
flowering scale about 2.8 mm. long, usually deep purple at the 
base, 5-nerved, the nerves converging above and indistinctly 
excurrent, the strongly hispidulous rather stout awn inserted 
about the middle and extending to or considerably beyond the 
apex of the scale; callus-hairs rather copious, in two lateral 
tufts, generally a little exceeding the scale; rudiment about 
o.5 mm. long, its hairs extending to the apex of the scale; 
palet about two-thirds as long as the scale. 
On wooded hillsides, Dawson, July 14, 1899 (R. S. 
Williams). Related to C. Scrzbnerz Beal, but the much 
