278 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
DISTRIBUTION. 
Dry sand, especially in ‘scrub, ” Georgia to Florida and Mississippi. 
Geroraia: Dock Junction, Ricker 963 in part. 
Fiorina: St. Augustine, Ricker 945; Gainesville, Chase 4245; Cedar Key, Combs 
777, 778; Eustis, Chase 4051, 4058, 4088, Hitchcock 796, 802, Nash 52, 72; 
Titusville, Chase 4028, 4029, 
Hitchcock 767; Ormond, Hitch- 
cock 563; Clearwater, Tracy 
6702; Jensen, Hitchcock 730; 
Braidentown, Combs 1288, 
1333, Hitchcock 969, 970, 971, 
East Pass, Tracy 6350; Mary 
Esther, Tracy 9139; Tampa, 
Hitchcock 930; Arcadia, itch- 
cock 856; Sebastian, Hitchcock 
755; Myers, Chase 41634, 4170, 
Hitchcock 9154. 
ALABAMA: Fort) Morgan, Tracy Fig, 312.—Distribution of P, patentifolium., 
7174. 
MississipPr: Biloxi, Kearney 330 in part. 
Oligosanthia.—Culms rather stout, usually erect; sheaths more or less hirsute, vil- 
lous, or sometimes glabrous; ligules inconspicuous except in P. ravenelii; 
blades firm, not over 2 cm. wide, usually narrower; spikelets about 3 to 4 mm. 
long, obovate, turgid, usually papillose-hirsute, strongly 7 to 9-nerved.  Au- 
tumnal form with branches more or less crowded toward the summit. 
Nodes bearded; blades velvety-pubescent beneath. 
Plants lax, soft-velvety throughout; spikelets not over 
3mm. long................-.-.----2------------ 
Plants stiff, pubescence harsh; spikelets about 4 mm. 
long..... 2.2.02 eee eee eee 
Nodes not bearded (or but obscurely so in P. wilcovianum); 
blades not velvety. 
Panicle narrow, branches erect, or spreading only at 
anthesis; blades erect. 
Spikelets not over 3mm. long; blades not over 6 mm. 
wide.... 2.2.2... 22.2 
Spikelets 3.7 to 4 mm. long; blades 8 to 20 mm. wide. 
Blades papillose-hispid.......2....0.0...-..22-- 
Blades glabrous on both surfaces. ............-. 
Panicle about as wide as long. 
Spikelets narrowly obovate, subacute; plants oliva- 
ceous, appressed-pubescent..........---.---- 
Spikelets broadly obovate, turgid, blunt; plants 
green, pubescence, if present, not appressed. 
Blades erect, not over 6 mm. wide; plants copi- 
ously hirsute throughout................. 
Blades ascending or spreading, rarely less than 
8 mm. wide, usually wider; plants not 
hirsute throughout. 
168. 
174. 
175. 
168. 
9. PP. 
2 
— 
? 
SS 
P 
malacophyl- 
lum. 
. ravenelit. 
. wileorianum. 
. leibergii. 
. canthophysum. 
. oligosanthes. 
. wilcorianum, 
