POACEAE | 97 
17. A. Mohrii Nash. Resembles A. vi irgata: a pes ed to a raceme, 
id Spikelets ide suc and distant along t xis: glumes 10-11 
. long, glabrous: lemma terete; lateral awns ue as ln ng as the pra 
ERE or reflexed. —Dry sandy pine ridges and ONDE Coastal Plain, Ala. 
18. A. don dea? Poir. Stems erect, mostly in small tufts, 1 Aur 
30-100 em. tall: leaf-blades flat, or becoming loosely involute, 1-2 m 
paniele Hore a em. long, 2 rat er p or bei hee frst Sion Hau 
1 em. long: lem a about . long, smooth: awns 15-25 mm. long, the cen- 
tral ; spreading, the latera M oes Sons db yb erect or spreading. —Sandy 
ns thickets, p fields and coastal sands, various provinces, Fla. i 
, Wis „ and Mass.—(W. I.) 
19. A. tenuispica A. Hitehe. Stem slender, 60—100 em. tall: leaf- -blades flat, 
—2 mm. wide, with scattered long hairs on the upper surface: is icle slender, 
the 2 appressed, eap de: distant, few-flowered: oss s equal, about 
8m : lem long: awns equal, 12-15 mm. long, sp ae or 
eet aos iar sed at base.—Low pine woods, pen. Fla. 
20. A. Perms Chapm. Stem erect, rather s 50-100 em. tall: leaf- 
blades 2-3 mm. wide: panicle compound, 15-30 e m. long, the branches pida 
ing, m ae ered, as much as 10 cm. long: glumes about 8 mm. long: lem 
little shorter than the glumes smooth: awns spreading, often a 
urved at base, 10-15 mm. long.—Dry sandy woods, pinelands, sandhills and 
Pe sands, ud Plain, Fla., Ala. and Ga. 
49. STIPA L. Perennials, usually tufted and erect, with narrow leaf- 
blades. Spikelets 1-flowered, articulate above the glumes, the articulation 
ee leaving a bearded sharp-pointed callus at the base of the floret; 
glu 
membranaceous, often papery, acute, acuminate, or even aristate, long 
deg unm ; lemma SN terete, firm or indurate, strongly convolute, 
terminating in a usually bent and twisted prominent persistent aw 
pa 
enclosed in the Wed emma.—One hundred species, of ana regions 
generally.—SPEAR-GRASSES. PORCUPINE-GRASSES. F'EATHER-GRASSES. DEVI 
DARNING-NEEDLES. 
Glumes purple below: first glume 5-nerved. 1. S. avenaceoides. 
Glumes pale: first glume 3-nerved. 2. S. avenacea. 
l. S. avenaceoides Nash. Stem 70—140 em. tall, naked above: leaf-blades 
1 mm. wide, flat or ui panicle 10—25 em. long, the few branches capil- 
lary, ascending, bearing 1 or 2 E ea f 
glumes 15-20 mm. long, acuminate: lem 
Abou. 1 5 cm. long, the long callus es 
bearded; awn 7-10 em. long.—Dry pine- 
s, Fla. 
in about 1 e abruptly acute or 
inate: lun br seabrous above, 8— 
10 mm . long, the callus Don -felty, the neck 
very short, ciliate: awn 4-7 cem. long.— 
7 
