164 



CONTRIBUTIONS FKOM THE NATIONAL HERBARIUM. 



DISTRIBUTION. 



Fig. 153. — Distribution of P. polycaulon. 



Flatwoods and hammocks, Florida and along the Gulf coast to Mississippi; also in 

 Cuba. 



Florida: Live Oak, Tracy 6727; Washington County, Combs 649 in part; Apa- 

 lachicola, Biltmore Herb. 6022a, Kearney 96; Orange County, Bale^r 68, 

 Combs & Baker 1086, Curtiss 6627; Orange Bend, Chase 4104; Titusville, 

 Chase 3967; Dunedin, Tracy 

 6698, 6723; Kalamazoo, Hitch- 

 cock 762; Sanford, Hitchcock 

 771, 772, 827; Manatee, Hitch- 

 cock 950, 974; Lakeland, Hitch- 

 cock 843; Tampa, Combs 1338, 

 HitchcockmS, 943; Hog Island, 

 Tracy 6710 in part; Lemon 

 Bay, Tracy 7188 in part; 

 Sneeds Island, Tracy 6692; 

 Santa Rosa Island, Tracy Sill; 

 Myers, Hitchcock 868, 903, 923-J, 

 Lee Co. PL 482; Miami, Chase 

 3885, Hitchcock 112, 665, 711, 721; Homestead, Hitchcock 689 J. 



Alabama: Fort Morgan, Tracy 7208. 



Mississippi: Horn Island, Tracy 6470; Petit Bois Island, Tracy 4606; Ocean 

 Springs, Skehan in 1895; Biloxi, Chase 4364. 



Cuba: HeiTadura, Hitchcock 115; without locality, Wright 3875 in part; Isle of 

 Pines, Palmer & Riley 990. 



Porto Rico: Near Piedra Blanca, Sintenis 5724, 5'2No'^ 



O 90. Panicum strigosum Muhl. 



Panicum strigosum Muhl. in Ell. Bot. S. C. & Ga. 1: 126. 1816. Elliott cites no 

 locality. The type, in the Elliott Herbarium, is a single immature plant, the panicle 

 only short-exserted. The accompanying label reads "Panicum strigosum Muhl. 

 Hab. in humid is. Car: & Georg: Flor: Ma-Jun:." 



Panicum laxiflorum j)ubescens Vasey, Contr. Nat. Herb. 3: 30. 1892. No locality 

 nor specimen is cited. Only two specimens bearing this name in Vasey's writing 

 can be found in the National Herbarium. One of these, Curtiss North American 

 Plants No. H, Duval County, Florida, agrees well with Vasey's description; the other, 

 a specimen of P. xalapense, does not agree with the description. The first is therefore 

 chosen as the type. 



Panicum longipedunculatum Scribn. Tenn. Agr. Exp. Sta. Bull. 7: 53. pi. 16. f. 61. 

 1894. "Damp woods, White Cliff Springs [Tennessee], July 1890; Tullohoma, July, 

 1892. A large form of this species is represented by No. 3597* A. H. Curtiss N. Am. 

 PI." The first specimen cited, which is evidently the plant 

 figui'ed and which is chosen as the type, is in Hitchcock's 

 herbarium. It consists of two tufts with slender culms 15 to 

 40 cm. high, more sparsely pilose than usual. 



DESCRIPTION. 



Fig. 154. — P. strigosum. 

 From type specimen. 



Vernal form similar to that of P. ciliatum. but having 

 sparsely pilose culms and sheaths, bearded nodes, and blades 

 on the average a little wider and more or less pilose on both surfaces; panicles larger, 

 with pilose axis and branches, bearing more numerous, smaller, glabrous spikelets, 

 the latter 1.3 to 1.5 mm. long, 0.7 mm. wide, obovate, less turgid than in other species 



