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Alopecurus geniculatus L. Ft. Selkirk (Tarleton). 
Alopecurus alpinus J. E. Smith. Ft. Selkirk (Tarleton), 
ARCTAGROSTIS ANGUSTIFOLIA Nash, sp. nov. 
A rather leafy perennial, with long running rootstocks. 
Culms erect, rather slender, 10-12 dm. tall, bracted at the 
base, the bracts gradually passing into leaves: leaves 3 or 
4; sheaths, at least all but the lowermost, shorter than the 
internodes, roughened at the summit; ligule scarious, 5-6 
mm. long, decurrent on the sheath; blades apparently lax, 
rough on both surfaces, 2-3 dm. long, 3-5 mm. wide, long- 
acuminate: panicle rather slender, contracted, nodding at 
the apex, 2—2.5 dm. long, its axis smooth, the fasciculate, 
somewhat hispidulous, branches appressed, the larger ones 
4-6 cm. long and naked at the base: spikelets numerous, 
about 3 mm. long, on hispidulous pedicels usually about 0.5 
mm. long; empty scales acute, 1-nerved, or the second some- 
times with an additional lateral nerve on each side of the 
base, the first scale about two-thirds as long as the second 
which is usually a trifle shorter than the palet; flowering 
scale acute, about 3 mm. long, strongly hispidulous, usually 
I-nerved, or rarely with a very obscure lateral nerve on each 
side, in side view lanceolate and about 0.5 mm. wide; palet 
slightly shorter than the scale or equalling it, faintly 2-nerved, 
strongly hispidulous; stamens 3, about 1.5 mm. long. 
Type collected by R. S. Williams on damp mountain side 
among brush at Dawson, on August 14, 1899; also secured 
near Big Salmon, on August 22. Resembling A. poaeordes 
described below, and A. arundinacea (Trin.) Beal in the 
basal bracts, from both of which, however, it is clearly dis- 
tinct in its taller and more slender culms and slender panicle, 
and the narrow flowering scales, which characters, together 
with its long lax leaves, at once separate it from A. poaeordes. 
ARCTAGROSTIS MACROPHYLLA Nash, sp. nov. 
A rather leafy perennial, with a running rootstock. Culms 
rather stout, 4-8 dm. tall, erect; leaves usually 3 or 4; 
sheaths rather loosely embracing the culm, the lower ones 
overlapping and exceedingly rough; ligule scarious, 4-5 
mm. long, decurrent on the sheath; blades erect, very rough 
on both surfaces, 2-4 dm. long, 8-12 mm. wide, long-acu- 
minate: panicle contracted, 1.5—2 dm. long, its axis and erect 
branches rough, the fasciculate branches of varying length, 
