62 
Trin. PORCUPINE-GRASS.—a, As ie Be: spikelet; b,a 
icaet Lael ey A pe magnified, showing the sharp-pointed, bearded callus at the 
Fi, og oe 91, in Bul.7,and 423 to 440,in Bul,17, illustrate other specie 
of the genus Bete 
©. wares Linn. Sp. Pl. 78. 1758. Spikelets flowered; rachilla articulated 
bearded, i, sbeontea, and sharp-pointed callus. Glumes 3, the first two em: pty, 
thin, membranaceous, subequal, acute or bristle- pointed, the 3d or fioral glume 
narrow, ; subcorinceous, cl closely rolled around lowed flower and usual 
palea, termin 
with its apex. Grain terete and closely red by the hardened fruiting 
Tufted perennial grasses with very narrow or involute leaves and 
usually open panicles. 
ical and temperate 
regions of ort ec aed sng in 
‘United States chiety Southwestern 
