978. CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
DISTRIBUTION. 
‘ 
Dry sand, especially in ‘‘scrub,” Georgia to Florida and Mississippi. 
GroratA: Dock Junction, Ricker 963 in part. 
Frioripa: St. Augustine, Ricker 945; Gainesville, Chase 4245; Cedar Key, Combs 
777, 778; Bustis, Chase 4051, 4058, 4088, Hitchcock 796, 802, Nash 52, 72; 
Titusville, Chase 4028, 4029, 
Hitchcock 767; Orraond, 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, Hitch- 
cock 856; Sebastian, Hitchcock 
759; Myers, Chase 41634, 4170, 
Hitchcock 9154. 
ALABAMA: Fort Morgan, Tracy Fic. 312.—Distribution of P. patentifolium. 
7174. 
Mississiprr: 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 to4 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, soit-velvety throughout; spikelets not over 
3 ina: lone! oa. Sree ae ee BRAISED V SENT C8 oa 169. P. | malacophyl- 
lum. 
Plants stiff, pubescence harsh; spikelets about 4 mm. 
16) 0 el iy anne pee mabe conte Ua! Heli ea ae atx 173. P. ravenelit. 
Nodes not bearded (or but obscurely so in P. wilcoxianum); 
blades not velvety. 
Panicle narrow, branches erect, or spreading only at 
anthesis; blades erect. 
Spikelets not over 3 mm. long; blades not over 6 mm. 
WL CLG Bes es Se aie oe Rae A eee 168. P. wilcoxianum. 
Spikelets 3.7 to 4mm. long; blades 8 to 20 mm. wide. 
Blades papillose-hispidsss2s-ee5--e ee ee 174. P. leibergit. 
Blades glabrous on both surfaces. ........-.-.---- 175. P. canthophysum. 
Panicle about as wide as long. 
Spikelets narrowly obovate, subacute; plants oliva- 
= ceous, appressed-pubescent.--...-..-..---.--- 172. P. oligosanthes. — 
Spikelets broadly obovate, turgid, blunt; plants 
green, pubescence, if present, not appressed. 
Blades erect, not over 6 mm. wide; plants copi- 
_ ously hirsute throughout............----- 168. P. wilcoxianum. 
Blades ascending or spreading, rarely less than 
8 mm. wide, usually wider; plants not 
hirsute throughout. 
