GRAMINEJE. (GRASS FAMILY.) 581 
flower fringed with closely appressed white hairs; spikelets awnless ; glumes 
hispid above ; sterile flower of 2 pales, 3-androus. (Rottbeellia ciliata, Nuit.) — 
Low pine barrens, Florida and the lower districts of Georgia. Sept.— Spikes | 
. 8'- 6' long. 
2. A. oligostachyus. Culms rigid, erect; leaves linear, smooth, glau- 
cous; spikes 8-4, on short mostly included peduncles, hoary with short spread- 
ing hairs ; lower glume pubescent, 3-3 as long as the contorted awn; sterile 
flower neutral, short-awned. — Dry sand-ridges, Middle Florida. Aug. and 
Sept. — Culm 29-39 high. Spikes 2/— 3! long. 
3. A. tener, Kunth. Culms filiform, like the smooth soon involute leaves ; 
spikes terete, with the joints bearded at the base, otherwise smooth ; spikelets ap- 
pressed, half as long as the bent awn; glumes rough above; upper palea minute; 
pedicel of the awnless neutral flower bearded at the apex. — Dry grassy pine 
barrens, Georgia, Florida, and northward. Sept. — Culms 29 - 39 long. Spikes 
slender, 1’- 2’ long. Upper leaves short, bearded at the throat. 
T * * Peduncles clustered, each bearing a single spike. 
4. A. scoparius, Michx. Leaves smooth or rough-hairy ; spikes numer- 
ous, on exserted peduncles, the slender flexuous rachis, and pedicel of the awned 
or awnless staminate or neutral sterile flower fringed with spreading hairs; per- 
fect flower half as long as the awn, the glumes often roughened with elevated 
points. — Dry sterile soil, Florida, and northward. Aug. and Sept. — Culms 
29-3? high. Spikes 1/- 2! long. " d 
* * * Peduncles or branches mostly clustered, bearing 2-4 rigid (green) digitate 
spikes: rachis and pedicel of the triandrous awnless sterile flower fringed with 
scattered hairs, and short-bearded at the base. 
5. A. furcatus, Muhl. Culm stout, rigid, 3°-5° high; leaves rough, 
fringed at the base; peduncles or branches commonly several at each upper 
joint; spikelets appressed; glumes hispid on the nerves, half as long as the bent 
awn. — Open woods and margins of fields, Florida, and northward. Sept. — 
Spikes compressed, 2/—3! long. 
* * * * Peduncles or branches 1—several from each upper joint, often included in the " 
dilated sheaths: spikelets slender, hoary with long silky spreading hairs: sterile 
Slower reduced to an awn-like glume at the apex of the very slender pedicel, or 
obsolete: stamen 1. Mr 
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