60 POACEAE 
diia 4-1, often flexuous, 1.5-5 em. long.—Wet ground, Coastal Plain, Fla. to 
Tex.—(W. T., Mex., C. A., S. A.) 
29. P. pubiflorum Rupr. Stem 40-100 em. peed p stout: eus 
peii or the lower hirsute; blades 10-15 pee glabrous: racem 
sually 3-5, 5-10 cm. long: spikelets about 3 m mm. long, softly pubescent 
(stems often taller: spikelets A d in pubiflorum glabrum. [P. lae 
glumis Scribn.], Woods, various provinces, Kans., Ind., and N. C.), bro oadly 
obovate. [P. Hallii Vasey & Seribn. P. potere Nash ]—Moist soil, Coastal 
Plain, La. to Tex.—(Mez.) 
30. rvillei Steud. Stems in large clumps, 100—150 cm. tall: bota leaf- 
sheaths ‘densely pe prem purplish ; hee des 8-12 mm. wide: s 10- 
20, P. Vaseyanum  Seribn.]—(VASEY- GRASS. ) — Fields, low 
C.—(C. A., 
UR oe. ud ons dee Coastal Plain, Fla. to Tex. and S. 
S. A.) 
31. P. A a e Den m 50-170 cm. tall: leaf-sheaths glabrous; ber; 
e: 3-8, 5-10 em. long.—(DALLIS-GRASS. )— —Moi uim 
pcm: dtum nid, "and Mns -places, various provinces, Fla. to Tex., "Tenn. 
and N. J.— —(W. lj € ' A., S. A.) 
oscianum Flügge. Annual, Pep as a whole, stems ascending fro en 
: pibus rooting base, 50—120 em. long: le ae ip purplish, the low 
most rz s 3-10 mm ae ra 2—9 . long: spikelets a 
in e s 2-2.3 m ae obov LP. Hid Ell. ]—Moist soil, 2 
us ounds, and hillsides, RE Plain, Fla. to Miss. and Pa. —(W. 
P. pie (Fl. SE. U. 8.)is a eens plant with solitary spikelets. 
33. P. plicatulum Michx. Stem 50-100 cm. tall: leaf-sheaths gee glabrous 
or iind palpi be lower crowded: od e fo x d at base, rather firm 
3-1 wide: racemes usually 3-10 oes 9), 2-10 em. long, u in areuate- 
a "spikelets drying brown, the sterile lemma wrinkled just inside the 
margin.—Moist soil, pinelands, E ods, a prairies, Coastal Plain, Fla. to Tex. 
and Ga.—(W. L., Mer., C. A., S.A.) 
27. PANICUM L. Annuals or proa various in habit. Spikelets in 
open or eo t panicles, rarely in racemes: glumes 2, usually very unequa 
the first NOLAN minute, the second typieally ser the sterile lemma, tlie 
latter enelosing a thin. alea and. sometimes a stam e flower: fertile lemma 
chartaceous-indurate, n iioc the nerves perd the margins inrolled 
over a palea of the same texture.—Five hundred species, in the warmer parts of 
both bones o OT - all year S.—PANIC-GRASSES. WITCH-GRASSES. 
Axis of branchlets extending beyond the base of the uppermost spikelet as a point or 
ins = 1-6 mm. long: perenniais: fruit transversely 
I. DISTANTIFLOBRA. 
Axis eo branchlets 2 extending into a Birds (In 
Panicum gen um and P. paludiv m the some 
what flattened axis pointed but not “bristle. form.) 
Basal leaves simil to stem-leaves for 
winter rosettes “spikelets all fertile. 
Fruit transversely r 
Plant annual: leaf. anesthe rather wide, flat: 
spikelets more or less ee -veined. III. FASCICULATA. 
Plant perennial: spike elets glabro 
Inflorescence consisting ee “several spike-like 
racemes along a main a II. GEMINATA. 
Inflorescence an open panicle VI. MAXIMA, 
Fruit not transversely rugose. 
First glume truncate or triangular-tipped, not 
more than one fourth the length of the nar- 
