78 POACEAE 
mm. long, ae Autumnal phase spreading, repeatedly branching from 
the base.— sandy soil, pinelands, and prairies, Coastal Plain, Fla. to La. 
and ve. DI. C. A.) 
87. P. trifolium Nash. Resembling P. albomarginatum: stem more slender, 
leaves i conspicuously crowded at the base, blades less thick and firm. Au- 
tumnal phase sparingly branching from the middle and upper nodes —Low 
Node pinelands, and prairies, Coastal Plain, Fla. to La., Tenn., and . J. 
P. vernale H. & C. Stem 15-30 em. tall, very win a leaves 
clustered at the base, the blades bae, soft, 2-7 cm. lon wide: panicles 
1.5-3 em. long: spikelets s 1.5 m . lon ng, eb c ion Dine forming 
soft mc -——Moist places, Coastal 1 Plain, Fla. to Miss 
89. P. chamaelonche Trin. Stem 10-20 em. tall, glabrous. Autumnal phase 
freely branching from the base and lower nodes. [P. Baldwinii Nutt. x ds 
sandy soil, pinelands, old fields, and hammocks, Coastal Plain, Fla 
. I.) 
90. P. glabrifolium Nash. Resembling P. chamaelonche: stem as much as 50 
em. tall. Autumnal phase ud branching from the middle and upper nodes. 
—Low sandy Nude pen. 
91. P. ensifolium Baldw. Stem 20—40 en tall, slender, glabrous: panicle 1.5—4 
em. long: spikele ets glabrous or puberule Áu tumnal phase spreading or re- 
E im ingly branching. [P. esce Ashe P. glabrissimum Ashe]— 
Wet pla es, woods, and pinelands, often in acid soil, Coastal Plain, Ga. to 
Miss. . dJ. 
92. P. ee H. & C. Stem very slender, 12-50 cm. tall, glabrou 
puberulent at the nodes: panicle 3-6 cm. lon Autumnal phase radiate. 
spreadi a ae branched.  [P. gracilicaule Nash |—Moist, sandy soil, 
Piedmont and Appalachian Valley, Ga. and Ala. 
P. brev 2 d Ri C. pes erect, Boiss tall: panicle 1.5—4 cm. long: 
spikelsts oe mm. long. Autumnal eas spreading, freely branching 
from the upper and middle nodes.—Low sandy or roeky pinelands, pen. Fla. 
94, P. flavovirens Nash. Stem slender, ascending or oe n em. 
tall, the lower vds greens crowded: blades 2—5 em. long, . wide: 
spikelets a about 1.4 . long. Autumnal phase spreading, E mos the 
lower and middle buc —Moist shady soil, Coastal Plain, Fla. to Miss. and 
N. C. 
Rut Š P peas Desv. Stem 15-30 em. tall: leaf-blades — em. long, 
wide, firm, glabrous to puberulent: paniele 2—4 em. long: spikelets 
BES n Autumnal phase ascending from a decumbent n repeatedly 
branehing.— Sandy pinelands, Coastal Plain, Fla. to Tex. and N. C.— — (W. I.) 
96. ae brio e Stem 20—50 cm. ee. rather I oo 
3-9 cm. long, 4-12 wide: panicle 4-10 em. long: spikele i ; 
long, r or Dub e: Autumnal phase bur Me: r dec iia flabel- 
ce branehed.—Low  pinelands, prd m and fields, Coastal Plain, Fla. 
o N. C. 
97. P. ee ewe Stem 25-55 em. tall: leaf-blades stiffly spre c E 
2.5-8 cm. long: pani a em. long: spikelets puberulent or nearly glabrous 
Autumnal phase eae spreading, branched from the middle eer upper 
nodes.—Dry sand, erc unde and hammocks, Coastal Plain, Fla. 
Miss. and Ga. 
