604 
GRAMINEJE. (GRASS FAMILY.) 
U Rocky woods and banks, rather rare. July. — The most slen¬ 
der and smallest-flowered species. 
§ 2. Gymn6stichum, Schreber. (Aspr611a, Humb.) — Glumes want - 
ing, or minute rudiments , sometimes apparent and awn-like. 
4. E. Hystrix, L. (Bottle-brush Grass.) Spike upright, 
loose (3'-6' long); the spreading spikelets 2-3 together, early de¬ 
ciduous From the joints, about 3-flowered; flowers srnoothish, or often 
rough-hairy, tipped with an awn thrice their length (1* long); leaves 
and sheaths srnoothish. )j. — Moist woodlands, common. July. 
40. HORDEUM, L. Barley 
Spikelets 1-flowered with an awl-shaped rudiment on the inner 
side, 3 at each joint of the rachis, but the lateral ones usually im¬ 
perfect or abortive. Glumes side by side in front of the spikelets, 
slender and awn-pointed or bristle-form. Pale® herbaceous, the 
lower (anterior) convex, long-awned from the apex. Stamens 3. 
Grain oblong, commonly adhering to the pale®. Rachis of the 
dense spike often separating into joints. (The ancient Latin name.) 
jllbatum, L. (Squirrel-tail Grass.) Lateral flow¬ 
ers abortive, neutral, on a short pedicel, short-awned; the perfect 
flower bearing an extremely long awn (2' long) about the length of the 
similar capillary glumes which form apparently a 6-awned involucre, 
all spreading. (2) — Marshes and moist sand along the coast and the 
Northern Lakes June. —Culm 1° high, slender, bearing a light, sin¬ 
gularly bearded spike. 
2. II. piisiiliini, Nutt. Lateral flowers imperfect and neu¬ 
tral, awnless but pointed, the perfect flower bearing an awn nearly 
twice the length of the palea, equalling the short awns of the rigid 
glumes, which rise, the central from an awl-shaped, the middle ones 
from an oblong base ; spike linear. ® — Saline soil, Ohio and west¬ 
ward. — Near H. maritimuin : 4' - 10' high. 
H. distichum, L., is the cultivated Two-rowed Barlev. 
H. vui.gA.re, L., is the common Four- (-Six-) rowed Barley; 
the lateral spikelets being also fertile, probably as a consequence of 
long-continued cultivation. 
Sec Ale cereAle, L., the Rye, is a well-known cultivated grain 
of this group, nearly allied to the Wheat in botanical character. 
41i AIRA, L. Hair-Grass. 
Spikelets 2-flowered, in an open diffuse panicle ; the (small) 
flowers both perfect (sometimes with a third imperfect), usually 
shorter than the membranaceous keeled often lead-colored glumes, 
