POACEAE | 45 
7. A. ru had un Kunth. Stem 0.6—1.2 m. tall, often glaucous: leaf- 
bla va es 2 mooth: racemes 6-10 em. long, the base included in the 
som 2 fated. upper z sheath, the denn straight, the joints tapering below 
Se ide: abou . long, the awn geniculate and twisted, about 1 e 
long: dw dps cd peru to a Mas 2—4 mm. long, the Ped thick, 
villous. [.A. ae Chapm. A. feensis gar S. i M Nash]— 
Pinelands, rc provinces, Fla., Ga., and Ariz. (W. I., Mex., S. A.) 
8. A. ie emi Spreng. Stem slender, tufted, glabrous, 0.2-0.6 m. tall: racemes 
2—4 cm. long, silvery ae ae cee the rachis slender, very villous: 
sessile “pike et abe ut 5 mm. long, n ge ae te and twist ed, 1-2 em. 
long: pedicellate spikelet re io to an awned or awnless glume, the pedieel 
very villous. [S. gracile Nash]—Rocky e S la. —(W. I.) 
9. A. provincialis Lam. Glabrous or more or less villous and often glauc- 
ous: stem 1-2 m. l: racemes 2—4, rarely more, on each peduncle, long-ex- 
serted, 5—10 cm. long, the bsp terminal and axillary: rachis straight, the 
joints E at base and along o r both m x rn sessile spikelet 7-10 mm. 
long, t sane a slightly JE scabrous, the awn geniculate and tightly 
ed belor 1-2 em. E Wa pedieel s sparingly ab du is hairs 
whitish. LA. T urcatus Muhl. A. tennesseensis Scribn.]— (BLUE-STEM.)—Dry 
soil, open w zu i de and old fields, various provinces, Fla. to Tex., 
Ariz., and Me. 
10. A. glomeratus (Walt.) B. S. P. Glabrous 2 often n the leaf- 
sheaths sometimes villous: stem 0.5—1.5 m. tall: racemes 1—3 em. long, as long as 
or a little eiii than the somewhat c ene and protruding from its 
side, the n peduncle within the spathe, and the stem just below the 
spathe villous, d the rachis slender s flexuous, ions alone. Meus Spikelet 3—4 
. long, the awn straight, 1-1. . long:.sterile spikelet reduced to a subu- 
late Eee or d the pedicel Pee long- -villous. [4. macrourus “Michx. 
A. corymbosus Nash A. tenuispatheus Na sh]—Low moist grounds, swamps, 
see and wet Pinelands, C vier Plain and occasionally adj. provinces, Fla. 
to Tex. and Mass.—(W. I , C. A.) 
11. A. longiberbis Hack. Ea slender, 0.5-1 m. a racemes in, pairs, 2—3 
em. long, the dx athe 3-5 em. long, enclosing the base of the ra o sessile 
To about 3 mm. ions the awn slender and gale) 10-15 mm. long. 
SPON pen. Fla.—A. Tracyi Nash, differs from A. lon giberbis in 
s ince peduncles oe " em) of the racemes in each spathe: leaf. sheaths 
glabrous.—Pinewoods, Fla. 
12. A. virginicus L. Stem virgate, 0.5-1 m. tall: lower sheaths compressed, 
equitant: ligule E e A ugs di iud along the upper half or 
two-thirds of the plan —4 from each spathe, 2-3 em. long, the 
t ab 
em. long.  [4. te etrastachys Ell. A. vaginatus Ell. macrourus vir 
Chapm.]— ( BROOM- SEDGE. ry grounds, pinelands, open woods, old fields, 
and beach sands, various provinces, Fla. to Tex., Mo., and Mass.; also in S 
Calif.—(W. I., Mex.) 
13. A. capillipes Nash. Differs from A. vi irgini icus in i ing EUN, a 
glaucous, especially the ind piede innov aes s, in having 
flexuous peduncles and often a more compact inflore ce: ligule eren or 
Mid ciliate. ‘4 es Nash]. Moist piselands, Coastal Plain, Fla. 
to Miss. and N. C 
14. A. d Rie Nash. Plant green or slightly uA stem slender, 
0.3—0.6 m. tall: sheaths not equitant: leaf-blades very narrow, the blades of 
the uo Mens folded, almost filiform, the ligule 1-1. 5 mm . long, firm 
