192 GRAMINEAE. 
13. Eragrostis hypnoides (lam.) B.S.P. Creeping Eragrostis. (Fig. 440.) 
Poa hypnoides Lam. Tabl. Encycl. 1: 
185. 1791. 
Eragrostis replans Nees, Agrost. Bras. 
514. 1829. 
Eragrostis hypnoides B.S.P. Prel. Cat. 
N. Y. 69. 1888. 
Culms 1/18’ long, extensively 
creeping, branched, smooth and gla- 
brous, the branches erect or ascend- 
ing, 1/-6’ high. Sheaths shorter 
than the internodes, villous at the 
summit; ligule a ring of short hairs; 
leaves 2’ long or less, %//-1’’ wide, 
flat, smooth beneath, rough above; 
spikelets dioecious, 10-35-flowered, 
2//-8’/ long; lower scales unequal, the 
first one-half to two-thirds as long as. 
the second; flowering Scales about 
14’ long, the lateral nerves promi- 
nent; scales of the pistillate flowers 
more acute than those of the stami- 
nate. 
On sandy or gravelly shores, Ver- 
mont and Ontario to Oregon, south to 
Florida and Mexico. Also in the West 
Indies. Aug.—Sept. 
66. EATONIA Raf. Journ. Phys. 89: 104. 1819. 
Tufted perennial grasses, with flat or involute leaves and usually contracted panicles. 
Spikelets 2-3-flowered; the rachilla extended beyond the flowers. Two lower scales empty, 
shorter than the spikelet, the first linear, acute, r-nerved, the second much broader, 
3-nerved, obtuse or rounded at the apex, or sometimes acute, the margins scarions; flowering 
scales narrower, generally obtuse. Palet narrow, 2-nerved. Stamens 3. Styles distinct, 
short. Stigmasplumose. Grain free, loosely enclosed in the scale and palet. [In honor of 
Amos Eaton, 1776-1842, American botanist. ] 
A genus of 4 or 5 species, confined to North America. 
Empty scales unequal, the first shorter and about one-sixth as wide as the second. 
Second scale obovate, often almost truncate. 1. £. obtusata. 
Second scale oblanceolate, obtuse or abruptly acute. _ 2. E. Pennsylvanica. 
Empty scales equal, the first not less than one-third as wide as the second. 3. &. ni/ida. 
1. Eatonia obtusata (Michx.) A. 
Gray. Blunt-scaled Eatonia. 
(Fig. 441.) 
Aira obtusata Michx. Fl. Bor. Am. 1: 62. 
1803. 
Eatonia obtusata A. Gray, Man. Ed. 2, 558. 
1856. 
Culms 1°-2%° tall, erect, simple, often 
stout, smooth and glabrous. Sheaths shorter 
than the internodes, usually more or less 
rough, sometimes pubescent; ligule 4//—1’’ 
long; leaves 1/-9’ long, 1/’-4’’ wide, scab- 
rous; panicle 2’-6’ in length, dense and 
generally spikelike, strict, the branches 114’ 
long or less, erect; spikelets crowded, 
14//-14” long; empty scales unequal, often 
purplish, the first narrow, shorter than and 
about one-sixth as wide as the obtuse or 
almost truncate second one; flowering scales 
narrow, obtuse, 34//-1/’ long. 
In dry soil, Massachusetts and Ontario to 
Assiniboia, Florida and Arizona. June-Aug. 
