89 
PHIPPSIA RB. Br. 
Spikelets 1-flowered, outer glumes minute, unequal, membranaceous ; 
flowering glume thin, three to four times longer than the outer ones, 
obscurely 3-nerved, keeled, acute; palet a little shorter, 2-keeled, 2- to 
4-toothed at the apex. 
1. P. algida R. Br. Culms densely tufted, ascending, 1 to 4 inches high, smooth; 
sheaths loose, long, striate, ligule short, obtuse, blade 4 to 2 inches long; panicle 
oblong to linear-oblong, loose, 4 to 1 inch long, contracted, branches short, approxi- 
mate; spikelets 4 inch long; empty glumes minute, obtuse; floral glume and palet 
nearly equal, concave, broad, obtuse, apex minutely denticulate.x—Arctic coast, moun- 
tains of Colorado, 11,000 feet altitude. 
