262 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Occasional specimens, such as Chase 4112, 4166, and 4304, are brighter green than 

 usual, with less pronounced white margins to the blades and resemble P. flavovirens, 

 but in these the primary culms bear short branches from the middle and upper nodes. 



DISTRIBUTION. 



Low, mostly moist sandy woods, North Carolina and Tennessee to Florida and 

 Louisiana. 



North Carolina: Scranton, Chase 3199; Roanoke Island, Chase 3225, 3238, 3239, 



3248; Chapel Hill, Ashe, Chase 3060; east of Wilmington, Chase 3133, 4576. 

 South Carolina : Orangeburg, 



Hitchcock 1387; without local- 

 ity, Ravenel. 

 Georgia: Below Macon, Small in 



1895; Warm Springs, Tracy 



8864; Augusta, Cuthbert 382, 



1159. 

 Florida: Baldwin, Hitchcock 997; 



Milton, Chase 4304; Apalachi- 



cola, Biltmore Herb. 697a; Lake 



City, Hitchcock 1023, 1038; 



Madison, Combs 263; Sanford, 



Hitchcock 779; Grasmere, 



Combs 1063; Orange Bend, Chase 4112; Tampa, Hitchcock 938,940; Braiden- 



town, Hitchcock 953, 962; Dunedin, Tracy 7029; Myers, Chase 4166, Hitchcock 



890, 920, 921; Miami, Chase 3946, Hitchcock 712. 

 Tennessee: White Cliff Springs, Scribner in 1890 (Hitchcock Herb.). 

 Alabama: Auburn, JEarle & Baker 1535 in part; Cullman, Eggert 24; Flomaton, 



Hitchcock 1042, 1050, 1053. 

 Mississippi: Jackson, Hitchcock 1305; Biloxi, Chase 4358, Hitchcock 1063, 1072, 



1088, Tracy 2865, 4612; Mississippi City, Hitchcock 1089, 1100, 1111, Avondale, 



Tracy 4583, 4603; Saundersville, Tracy 3334; Horn Island, Tracy 4601. 

 Louisiana: Calhoun, Hitchcock 1267, 1277; Lake Charles, Hitchcock 1130, 1146. 



155. Panicum flavovirens Nash. 



Fig. 286.— Distribution of P. trifolium. 



Panicum flavovirens Nash, Bull. Torrey Club 26: 572. 1899. "Type collected 

 by the writer in Lake Co., Florida, June 16-30, 1895, no. 2061; growing in swampy 

 woods along the edge of road leading to the ford near the J. T. & K. W. R. R. bridge 

 across the Wekiva river." The type, in Nash's herbarium, is a late vernal form, 

 the primary panicles mostly destitute of spikelets. One of the specimens has a tuft 

 of the long, rather thin, bright green, glossy basal leaves that distinguish this species. 

 The other specimen lacks this prominent tuft of basal leaves and in habit resembles 

 the type of P. albomarginatum Nash, but the blades are not 

 firm and leathery nor white-margined, and the panicles are 

 few-flowered, with flexuous branches. 



description. 



Vernal form bright glossy green; culms densely tufted, 

 very slender, ascending or spreading, 15 to 30 cm. high, 

 glabrous, more or less striate-angled, the lower leaves 

 somewhat crowded with overlapping sheaths, the upper distant; sheaths often mi- 

 nutely ciliate on the margin, especially at the summit, otherwise glabrous or the 

 lowermost obscurely pubescent; blades ascending or spreading, 2 to 5 cm. long, 3 to 



Fig. 287.— P. flavovirens. 

 From type specimen. 



