386 
BOTAKT. 
PoA ALPiNA, L., Var. (!) Glaucous and more or less scabrous through- 
out, stout and tufted; culms 4-15' high; leaves erect, rather thick, the 
cauline and often the radical ones very short; panicle, 1^-3' long, close, the 
branches nearly sessile, erect or somewhat nodding ; upper glume 1|-2J" 
long, slightly scabrous on the midvein ; lower palet 2J" long, more or less 
villous-pubescent at base, obtuse ; perfect grain over 1" long. — The two forms, 
one with erect rather close panicles, and the other rather loose and nodding, 
are distributed under separate numbers, (1,312 and 1,313.) The ordinary 
smoother forms of the species show the glumes and the palets but IJ" or 
even less in length. Greenland and Labrador ; Northern Maine and Lake 
Superior, and from the Saskatchewan to Bear Lake and the Rocky Moun- 
tains ; Colorado ; California, (5068 Bolander.) The variety was collected in 
the West Humboldt, Clover, and East Humboldt Mountains, Nevada; 
8-11,000 feet altitude; June-September. 
PoA c^siA, Sm., near Var. steictior. Gray. A low slender form, with 
a rather contracted panicle of small flowers, 1" or less in length. It is also 
near forms of P. laxa, Hsenke, which Munro makes identical with P.Jlexuosa, 
P. arctica, etc., and from which it differs chiefly in its scabrous panicle. 
From Northern Wisconsin north and westward. Uinta Mountains above 
the head of Bear River; 12,000 feet altitude; August. (1,314.) 
PoA SEEOTIXA, Ehrh. Culms tufted, 18' high, smooth ; leaves narrowly 
linear, scabrous ; ligules short ; panicle pyramidal, very loose and spreading, 
3-8' long; branches in fives, capillary, a little scabrous; spikelets purplish, 
3-4-flowercd; glumes acute, IJ" long; lower palet sHghtly webbed at base, 
li" in length.— The same as 672 Hall & Harbour from Colorado, (^namedby 
Godet in letter to Dr. Gray, F. Hallii,) though with a larger and wider 
panicle, and not differing from numerous specimens in Herb. Gray. This 
species, as well as P. ccesia, Sm., is referred by Munro in Hooker's Arctic 
Flora to F. ne?noralis, L. From New England and Canada west to Wash- 
ington Territory, northward to the Slave River and Behring Strait and 
south to Colorado. On the Bear River in the Uinfas ; 7,000 feet altitude ; 
August. (1,315.) 
PoA FLExuosA, Muhl. (I) From Virginia to Florida and west to Ken- 
tucky ; specimens collected in the Wahsatcli near Salt Lake City are referred 
here, though of a somewhat different habit ; 5,000 feet altitude; May. (1,316.) 
PoA Eatoni. Allied to the last. Culms smooth, li-2° high; sheaths 
