HITCHCOCK AND CHASE — NORTH AMERICAN PANICUM. 



277 



Georgia: Brunswick, Ruth in 1893 (Ohio State Univ. Herb.). 



Florida: Jacksonville, Curtiss 4637 (Hitchcock Herb.), ./. D. Smith 570; Lake 



City, Hitchcock 1024; Apalach- 



icola, Biltmore Herb. 6204a; 



Seville, Curtiss 6610; Titus- 



ville, Chase 3964; Hitchcock 



766|-; Grasmere, Combs 1164; 



Eustis, Chase 4051^, Hitchcock 



792, 811, Nash 781; Sanforcl, 



Hitchcock 782; Tampa, Hitch- 

 cock 930£; Wimauma, Hitchcock 



979; Arcadia, Hitchcock 855; 



Kalamazoo, Hitchcock 765£; 



Lakeland, Hitchcock 838^,840; 



Braidentown, Hitchcock 955, 



972, Tracy 6716; Johns Pass, Tracy 7186; Jensen, Hitchcock 735, 748; Myers, 



Chase 4163, Hitchcock 910, 918, Lee Co. PI. 470; Miami, Hitchcock 630; without 



locality, Rugel 443. 



167. Panicum patentifolium Nash. 



Panicum patentifolium Nash, Bull. Torrey Club 26: 574. 1899. "Type collected 

 by the writer at Eustis, Lake Co., Florida, March 12-31, 1894, no. 72, in dry sand in a 

 scrub hammock." The type, in Nash's herbarium, is the vernal form with two 

 autumnal culms of the preceding year attached; all the blades are narrow, even the 

 basal ones not over 4 mm. wide. 



Fig. 310.— Distribution of P. webberianum. 



DESCRIPTION. 



Vernal form often purplish throughout; culms several to many in a tuft, slender and 

 wiry, widely decumbent-ascending, 25 to 55 cm. high, minutely puberulent or nearly 

 glabrous; sheaths much shorter than the elongated internodes, a puberulent ring at 

 the summit, otherwise glabrous or nearly so; blades stiffly spreading, 2.5 to 8 cm. long, 

 2 to 5 mm. wide, glabrous, acuminate, narrowed and sometimes ciliate toward the base; 

 panicles commonly rather short-exserted, 3 to 7 cm. long, about half as wide, the 



branches few, ascending; spikelets 2.4 to 2.6 mm. 

 long, 1.3 mm. wide, obovate, turgid; first glume 

 one-third to half as long as the spikelet, obtuse or 

 subacute; second glume and sterile lemma puberu- 

 lent or nearly glabrous, the glume slightly shorter 

 than the fruit and sterile lemma ; fruit 2 mm. long, 

 1.2 mm. wide, elliptic, smooth and shining, mi- 

 nutely puberulent at the apex. 



Autumnal form decumbent or spreading, 

 branching from the middle and upper nodes, the 

 branches appressed and somewhat elongated, the 

 secondary branchlets shorter and more or less 

 fascicled, not greatly reduced; winter rosettes appearing late, inconspicuous, the 

 narrow blades ascending. 



This species differs from P. webberianum in the more slender culms, narrower, 

 spreading culm blades, absence of the large basal blades, and less turgid spikelets in 

 which the fruit is smooth and shining. 



Fig. 311.— P. patentifolium. 

 type specimen. 



From 



