748 GRAMINEZ: PHRAGMITES 
DACTYLIS 
horizontal perennial rootstocks, glabrous: sheaths shorter than the inter- 
nodes, loose: ligules a ring of very short hairs: leaves 6-18 inches long, 4-9 
lines wide: spikelets crowded on the ascending branches: first glume 1- 
nerved, +g-% as long as the second one: flowering glumes 5-6 lines long, 
3-nerved, long-acuminate, equalling the hairs of the rachella. . In bogs 
and wet places nearly throughout North America: also in Europeand Asia. 
35 DACTYLIS L. Sp. 71. 
Tall perennial grasses with broad flat leaves and numerous — 
spikelets crowded in paniculate short capitate clusters. Spikelets 
3-5-flowered, all perfect or the upper staminate, the two lower 
glumes empty, thin-membranaceous, keeled, unequal, mucronate. 
Flowering glumes longer than the empty ones, rigid, 5-nerved, 
keeled, the midnerve extended into a point or short awn. Palets 
shorter than the glumes, 2-keeled. Stamens 3. Styles distinct. 
Stigmas plumose: Grain free, enclosed in the glume and palet. 
D. q@tomerata L. Sp. 71. Stems simple, erect, 2-4 feet high: sheaths 
shorter than the internodes: smooth or rough: ligules 1-2 lines long: 
leaves 3-9 inches long, 1-3 lines wide, flat, scabrous: panicle 3-8 inches 
long, its branches spreading or ascending in flower, erect in fruit, the lower 
1-3 inches !ong, spikelet bearing from about the middle: spikelets in dense 
capitate clusters, 3-5-flowered: empty glumes 1-3-nerved, the first shorter 
than the second: flowering glumes 2-3 lines long, rough, pointed or short- 
awned, ciliate on the keel. In fields and waste places, naturalized from 
Europe. 
36 KQCSLERIA Pers. Syn. i, 97. 
Tufted perennial or annual grasses with flat or setaceous leaves 
and numerous spikelets in spike-like panicles. Spikelets 2-5-flow- 
ered. Glumes 4-7, the twe lower empty, narrow, acute, unequal, 
keeled, scarious on the margins. Flowering glumes 3—5-nerved. 
Palets hyaline, acute, 2-keeled. Stamens 3. Styles very short, 
with plumose stigmas. Grain free, enclosed in the glume. 
K. cristata Pers. 1. c. Stems erect, simple, rigid, often pubescent 
just below the panicle: sheaths often shorter than the internodes, smooth 
or scabrose, sometimes hirsute: ligules 4 line long: leaves 1-12 inches long, 
46-144 lines wide, erect, flat or involute, smooth or rough, often more or 
less hirsute: panicle 1-7 inches long, pale green, usually spike-like, the 
branches erect or rarely asceuding, 1 inch long or less: empty glumes une- 
qual, the first one about 2lines long, scarious except the green keel ; second 
one longer, scabrous on the keel; flowering glumes scarious, 1}2-2 lines 
long. On sandy bars along rivers. California to Brit. Columbia and 
Pennsylvania. 
37 EATONIA Raf. Journ. Phys. lxxxix 104. 
Tufted perennial grasses with flat leaves and usually contract- _ 
ed panicles. Spikelets 2-3-flowered, the rachella extended beyond 
the flowers. Two lower glumes empty, shorter than the spikelet, 
the first linear acute, i-nerved, the second much broader, 3-nerved, 
obtuse or rounded at the apex or sometimes acute, the margins. 
scarious: flowering glumes narrow, usually obtuse. Palets narrow, 
2-nerved. Stamens 3. Styles distinct, short. Stigmas plumose. 
Grain free loosely enclosed in the glume and palet. 
