POACEAE 77 
often villous on the vag ae panicle 4—7 em. long, the few branches ied 
ascen sine the spikelets on long stiff pedicels. Autumnal phase decumben 
spreading, the branches hes ressed.  [P. strictifolium Nash]—Dry pi ends 
and peru ead Fila. 
78. P. Commonsianum Ashe. Plant olivaceous: stem 20—50 c tall, stiffly 
ascending or spreading, appressed-strigose or als ui qud leaf. bla des firm, 
stiffly ascending, glabrous above, strigose or glabrous Miu M nar: 4-8 
long. Autumnal phase spreading or on strate, forming pM a 
na 
woods and pinelands, Coastal Plain and New England Coast, Fla. to Con 
79. P. Addisonii Nash. Resembling P. Commonsianum: usually less than 40 
cm. e leaf-sheaths sparsely agra P eos E above, pubes- 
r glabrous beneath: panicle 2-6 c ong. nal phase spreading, 
freely branching, the branches HM. mi d barrons, often acid, Coastal 
Plain and New England Coast, S. C. to Ind. and Mas 
P. tsugetorum Nash. Plants rather pale bluish- -green: stem 30-50 em 
high) ascending, sometimes genicul ~ T base, densely prece pubescent: 
1 F a wide 
ligules 1-1.5 mm. long: leaf-blades em. long, , glabrous 
above, appressed-puberulent beneath: dos about ion ng. anal 
phase decumbent-spreading, eee: the b. ea —Acid sandy 
woods, various provinces, Va. to Tenn., Ill., and Me. 
80a. P. columbianum Scribn. Differs from P. tsugetorum in being smaller, 
more slender, with the stiffer culms densely crisp- puberule nt, and smaller spike- 
lets (about 1.5 mm. long).—Sandy woods, various provinces, N. C. to Me. 
81. P. sphaerocarpon Ell. Nu po B Ve 20-55 cm. tall, Scand 
spreading (ascending: ligul 3-1 m ong in P. POE un on i inflat 
. to N. C.) : leaf-sheaths poros ciliate: ligules obsolete: blades thick a nud 
firm, e above smooth beneath: panicle a -exserted, 5-10 em. long: spike- 
lets 1.6-1.8 mm. long, puberulent. Autu l phase prostrate- spreading, the 
branches nese simple. —Sandy soil, acid woods. thickets, and prairies, various 
provinces, Fla. to Tex., Kans., and Vt.—(Menz., 'C. A., S. A.) 
82. P. polyanthes Schult. Plant glabrous or beta Se so: stem erect, 30—90 
em. tall: leaf-blades 12-23 em. long, 15-25 mm. wide: panicle 8-25 em. long. 
Autumnal phase erect, spar sely branched. "Da amp ground, woods, thickets, 
stream- pes and prairies, various provinces, Ga. to Tex., Okla., and N. J. 
83. P. d Nash. Stem erect, 30-70 em. tall: panicle 6—12 em. lo ong. 
Áu phase erect, little. branched — Moist pinelands, mu ON Gua 
SR Coastal Plain, Fla. to La. and N. C.—(W. I.) 
84. P. curtifolium Nash. Stem weak, slender, 10-30 em. tall, ne the 
nodes sparsely bearded: leaf-blades spreading or reflexed, 1.5- jd pay ng, 2-5 
mm. wide, thin and soft: panicle 2-3 cm. long: spikelets 1.4 ong, gla- 
brous or minutely pubescent. Autumnal phase vues Pm is ultimate 
branches in small fascicles. [P. Earlei es oggy soil, Coastal Plain 
and adj. provinces, Fla. to Ala., Tenn., and S. 
e Muhl. Stem 20—55 em. tall, glabrous or the lower part sparsely 
oe mod leaf-sheaths sparsely appressed-pilose or the upper gla- 
brous: panicle 3-5 em. long: spikelets 1.6 mm. long, puberulent. Autumnal 
phase erect or leaning, branching from the middle nodes.—Moist sandy woods, 
Coastal Plain, Fla. to N. C. 
P. albomarginatum Nash. Stem 15—40 em. tall: leaf-blades thick and firm 
with a thick cartilaginous margin: panicle 3-6 cm. lon ng: spikelets about 1. 5 
