* 
GRAMINEX. (GRASS FAMILY.) | 571 
3-nerved, more or less pubescent; culms diffuse, creeping ; leaves flat, glaucous, 
rough above, and, like the sheaths, smooth or hairy. (P. tristachyum, Leconte?) 
— Swamps and low grounds, Florida to North Carolina, and westward. Aug. 
and Sept. Y — Flowering stems 1° high. 
6. P. preecox, Walt. Spikes 3~6; spikelets by pairs, in 3 rows, orbicu- 
lar, compressed, as wide as the straight ánd flat rachis ; glumes smooth, 3-nerved, 
often discolored ; culms erect (30° -4° high), simple; leaves long and narrow; 
sheaths purple, smooth or hairy. — Pine-barren swamps, May and June. y. 
7. P. leve, Michx. Spikes 3-5, long (3'-4/) and slender; spikelets 
single, in 2 rows, orbicular, wider than the flexuous rachis; glumes smooth and 
even, 5-nerved ; culms simple, erect (329 —49 high); leaves (deep green) and 
sheaths smooth, or the latter hairy. — Dry woods and margins of fields, Florida, 
and northward. July and Aug. | — Spikelets 13" long, larger and thicker 
than the last. 
8. P. Floridanum, Michx. Spikes 2-3, thick, erect; spikelets large (27 
long), mostly in 3 rows, broadly oval, tumid, wider than the flexuous rachis ; 
glumes smooth, 5-nerved, more or less rugose; culms rigid, erect (29 high) ; 
leaves narrow, rigid, and, like the sheaths, rough-hairy. (P. macrospermum, 
Fluegge.) — Damp soil, near the const, Florida. Ane and eed xu — Plant 
glaucous. : 
I ‘raneea mipsel, Nut. ‘Spikes 2-3, mere erect t (4'1oug); dio. 
lets single or by pairs, obovate, distant on the filiform and somewhat flexuovs 
rachis, distinctly pedicelled; glumes smooth, obtuse, 7-nerved ; culms simple, 
erect (2°-3° high) ; leaves long, linear, kecled, glaucous, and, like the sheaths, 
sprinkled with long white hairs. (Panicum Alabamense, Trin.) — Dry sandy 
soil, Florida to North Carolina, and westward. Aug. and Sept. Y. 
10. P. undulatum, Poir. Spikes 2-12, spreading (2!—3! long) ; spike- 
lets small (1" long), oval or roundish, crowded in 3-4 rows under the broad 
and flat rachis; glumes smooth, 5-nerved ; palez of the neutral flower often ru- 
gose; culms erect or ascending, mostly branching; leaves deep green, broadly 
linear, flat, mostly fringed on the margins or near the base, and, like the smooth 
or hairy sheaths, often purple. (P. purpurascens, E/l P. plicatulum, Michz. 
P. confertum, Leconte. P. Boscianum, Fluegge.) — Low cultivated gon, Flor- 
ida to North Carolina. Sept. @ — Culms }° -3° high. ; 
It. P. Blodgettii, n. sp. Spikes 4, filiform; spikelets minute a" long), 
in 3 rows, elliptical, as wide as the straight rachis glumes 3-nerved, minutely 
pubescent and granular; culms tufted, simple, erect (19- 14° high); leaves flat, 
fringed on the margins. — Key West, Dr. Blodgett. 1 — Spikes 1! long. 
12. P. ciliatifolium, Michx. Spikes slender, mostly solitary, rarely 2- 
_ 8, on long lateral and terminal peduncles, of which 2-3 often project from the 
upper sheath ; spikelets orbicular; in 2-3 rows, wider than the narrow flexuous 
rachis ; glume 3-nerved, commonly pubescent ; culms tufted (19 — - 2° long), : erect 
