80 
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Fic. 58. Agrostis alba Linn. RED-TOP.—a, Empty glumes: b, floret inclosing 
stamens. Other A org of Agrostis are illustrated by figs. 135 to 140, in Bul.7, 
and 478 to 484, in Bul. 1 
56. AGROGTIS Linn. . Sp. Pi. 6. 1753, Spikelets 1 ‘flowered; rachilla articu- 
Empty glum 
btuse, awnless 
2, equal or nearly 80, acute, longer than th 
broad, less than H Hy o 
with a slender dorsal awn. Palea hyaline, much s th 
absent. te ens 3. Grain i acicull We the: feed glume, but free 
perennial grasses, with small spikelets in open, 
usually gaily ee 
Species about 100, distributed over the entire world, especially in the north 
zone. In the United States the te mei ae ort nero In the 
int Northwest. 
