70 POACEAE 
GRASS.)—Woods, fields, marshes, prairies, and waste-places, various aae 
Fla. to Tex., Mont. and Me—Panicum Bergii Arech., differin Tu 
capillare in being perennial, in having involute leaf -blades s, the i of the 
panicle strongly pilose, and the lower branches in verticils, has been found on 
ballast at Mobile, Ala., and Galveston, Tex 
14. P. Gattingeri Nash. Stem soon decumbent- Ta ee at the lower 
nodes, as much as 100 cm. long: leaf-blades 6-10 m ore or less hispid: 
Bc numerous, terminal and axillary, the ear '10— 18 em. long, the latter 
maller.—Open ground, dry hills, woods, cult. A ine and waste- -places, various 
puri N. C. and Tenn. to Minn and N. Y 
15. P. philadelphicum Bernh. Stem mostly erect, 15—20 cm. tall, usually zigzag 
at the slender base: leaf-blades 2-6 mm. wide, sparingly hirsute: paniele ovoid, 
few-flowered, the spikelets usually in twos at the ends of the p mu 
open ground, hillsides, barrens, and roadsides, various provinces, Ga. to Okla 
Wis., and Me. 
16. P. um Jacq. Stem erect, 100—250 em. tall, ee a E root- 
stock: leat sheaths papillose- o to P ligules . long: blades 
elongate, 1-3.5 ecm. wide: panicle 20—50 cm. lo ong, about me third & s wide, the 
- aches ascending the ie in whorls erin in the axils: spikelets about 3 
long.— (GUINEA-GRASS. ae rounds, o a: and ditches, Coastal 
Plain, Fla. Nat. of Afr.— » C. A., S. A., O. W.) 
17. P.repens L. Stem rigid, 30-80 cm. tall, from an émises creeping root- 
stock: leaf-blades 2-5 mm. wide: panicle 7-12 em. long, the branches ascending: 
spikelets pale, about 2.5 mm. long.—Sea be eaches, sand-dunes, and sandy soil, 
Coastal Plain, Ala. to La. Nat. of O. W.—(W. I., C. A., S. pus 
18. P. Gouini uale Resembling P. repens, usually lower: panicle smaller, 
narrower, more densely flowered, commonly purple: oed 2—2.4 mm. long. 
[P. halophilum Nash]—Sea beaches, Ala. and Miss.— —(Mez.) 
19.. P. amarum Ell. Plant glaucous and glabrous be ind stem solitary 
from a stout p creeping rootstock, 30—100 cm. tall: panicle ay over 
a ier wide, few-flowered, the bra cae appressed : sie ets 5-6.5 mm. long, 
eine ae ma ed. [P. amaroides Seribn. & Merz] — Beaches and 
a Coastal Plain and New England Coat, Ga. to Miss. and Co 
20. P. amarulum H. & C. Resembling P. amarum, but grows in large bunches, 
100 p be tall: E 5—10 cm. wide, no dding: spikelets 4.5—5.5 mm. long. 
[P. amarum (Fl. SE. U. S. )] (Bean -GRASS.)—Beaches and dunes, Coastal 
Plain, Flo. to La. and Va.— I.) 
21. P. virgatum L. Plant erect, with stout scaly pee glabrous through- 
out, or upper surface of léaf-blades pilose, utu. tal (more slender, the 
panicle narrower: spikelets 2.8—3.2 mm. long, firs ra about half the length 
of the cR acute o nly, in n P. virgatum cubense. | [P. virgatum breviramosum 
Na i e ndy d Ld Coastal Plain, Fla. to Miss. and Conn. (JV. I.)): 
paniel ru 50 em. long, open or diffuse: spikelets 3.5-5 mm. long, acuminate.— 
Pr ace ia marshes, hammocks, and salt marshes, various provinces, 
Fla. to Ariz., Wyo., an nd Me.—(Me ex., C. A., S. A.) 
22. P. tenerum Beyr. Plant slender in pied tufts from a knotted crown, 
40-90 cm. p leaf-blades ae firm dq wide: panicle 3-8 em. long, 
about 5 wide: spikelets a out 2.5 EE “PD. stenodes (Fl. SE. U. 8.) ] 
—Wet DUE ponds, and pod poeni Plain, Fla. to Tex. and N. C.— 
(W. I.) 
