616 
GRAMINEJE. (GRASS FAMILY.) 
triangular joint of the narrow rachis, longer than the joints, form¬ 
ing a 1-sided 2-ranked spike, both alike, 2-flowered : glumes co¬ 
riaceous, the lower (outer) one nerved, the inner boat-shaped: 
pale® very thin and membranous, awnless : anthers (turning or¬ 
ange or reddish-brown) opening by 2 pores at the apex. Pistil¬ 
late spikelets single and deeply imbedded in each oblong joint of 
the cartilaginous thickened rachis, occupying a boat-shaped recess 
which is closed by the polished cartilaginous ovate outer glume, 
the inner glume much thinner, pointed, 2-flowered, the lower 
flower neutral: pale® very thin and scarious, crowded together, 
pointless. Styles united : stigmas very long (purple), hairy. 
Grain ovoid, free. Culms stout and tall, solid, from thick creep¬ 
ing rootstocks. Leaves broad and flat. Spikes axillary and ter¬ 
minal, separating spontaneously into joints at maturity. (Name 
from Tpii 3<o, to rub , perhaps in allusion to the polished fertile spike.) 
1. T. dactyloides, L. Spikes (4'-8' long) 2-3 together at 
the summit (when the contiguous sides are flattened), and solitary 
from some of the upper sheaths (when the fertile part is cylindrical), 
sometimes, var. monostachyum, the terminal also solitary. Moi&t 
soil, Connecticut to Penn., near the coast, and southward. Aug. 
Culm 3°-6° high : the leaves like those of Indian Corn. 
57. BRIAN THUS, Michx. Woolly Beard-Grass. 
Spikelets spiked in pairs upon each joint of the slender rachis, 
one of them sessile, the other pedicelled, otherwise both alike, 
with the lower flower neutral, of one membranaceous palea ; the 
upper perfect, of 2 hyaline pale®, which are thinner and shorter 
than the nearly equal membranaceous glumes, the lower awne 
from the tip. Stamens 1-3. Grain free. —Tall and stout reed 
like Grasses, with the spikes crowded in a panicle, and clothe 
with long silky hairs, especially in a tuft around the base of each 
spikelet (whence the name, from tpiov , ivool , and uv6os , flower) • 
1. E. alopecuroides, Ell. Culm (4°-6° high) v ' ool ^ r 
bearded at the joints; panicle contracted ; the silky hairs muc i °*j§ 
than the spikelets, shorter than the straight awn; stamens . U 
Wet Pine barrens, New Jersey, rare, and southward. Sept. 
58. ANDROPOGON, L. Beard-Grass. 
Spikelets in pairs upon each joint of the slender rachis, spiked 
or racemed; one of them pedicelled and sterile, often a mere 
