Part 3, 1915] POACKAH 255 



126. Panicum lucidum Ashe, Jour. Elisha Mitchell Soc. ,15: 47. 



1898. 



? Panicum dichotomum gracile Torr. Fl. U. S. 145. 1824. 



Panicum taxodiorum Ashe, Jour, Elisha Mitchell Soc. 16: 91. 1900. 



Vernal phase at first erect and resembling that of P. dichotomum, but the weak culms soon 

 becoming decumbent, sometimes rooting at the lower nodes; leaf -sheaths glabrous, usually 

 ciliate on the margin; blades thin, bright-green, shining, glabrous, at first erect, but soon 

 widely spreading, 4-7 cm. long, 4—6 mm. wide; panicles resembling those of P. dichotomum but 

 fewer-flowered; spikelets 2-2.1 mm. long, 1 mm. wide, elliptic, glabrous (rarely obscurely 

 pubescent); first glume about two fifths the length of the spikelet, pointed; second glume and 

 sterile lemma more strongly nerved than in P. dichotomum, both shorter than the fruit at 

 maturity; fruit 1.7 mm. long, 0.9 mm. wide, slightly pointed. 



Autumnal phase repeatedly branching, forming large clumps or mats of slender, weak, 

 vine-like culms, the branches elongate and diverging at a wide angle, not fascicled, the blades 

 2-4 cm. long, waxy, flat and spreading; panicles much reduced, with few long-pediceled spike- 

 lets; basal blades linear-oblong, as much as 10 cm. long. 



Type locality: Lake Mattamuskeet, North Carolina. 

 Distribution: New York to Florida, and west to eastern Texas. 



Illustrations: Bull. U. S. Dep. Agr. Agrost. 17: /. 363; Contr. U. S. Nat. Herb. 15: /. 201; 

 Britt. & Brown, 111. Fl. ed. 2. /. 346. 



127. Panicum sphagnicola Nash, Bull. Torrey Club 22: 422. 1895. 



Vernal phase grayish olive-green, cespitose; culms slender, strongly flattened, erect or 

 reclining, 50-100 cm. high; leaf-sheaths glabrous or the lowermost sparsely papillose-pilose, 

 soon becoming divaricate and enveloping the internodes only at base; blades at first erect, 

 later widely spreading, glabrous, 5-8 cm. long, 3-7 mm. wide; panicles narrow, 5-6 cm. long, 

 the branches ascending or somewhat spreading, not spikelet-bearing at the base; spikelets 

 2.5 mm. long, 1.1 mm. wide, elliptic; first glume nearly half the length of the spikelet, subacute; 

 second glume and sterile lemma strongly nerved, minutely pubescent toward the summit or 

 glabrous, the glume shorter than the fruit; fruit 2 mm. long, 1—1.1 mm. wide, elliptic, subobtuse. 



Autumnal phase decumbent or finally prostrate-spreading, divaricately branching from 

 all the nodes, the branches slender and elongate, sometimes rooting at the nodes; sheaths 

 divaricately spreading from the stem, usually nearly as long as the blades; blades flat, reduced 

 in length but not much in width, mostly 1-2 cm. long, or on the ultimate branchlets only 5 mm. 

 long and 1 mm. wide; panicles rather few, reduced to a few short-pediceled spikelets; basal 

 blades 4—8 cm. long, about 1 cm. wide, sometimes sparsely pilose at base. 



Type locality: Lake City, Florida. 

 Distribution: Georgia and Florida. 



Illustrations: Bull. U. S. Dep. Agr. Agrost. 17: /. 362; Contr. U. S. Nat. Herb. 15: /. 203; 

 Britt. & Brown, 111. Fl. 3: App./. 264b. 



128. Panicum spretum Schultes, in R. & S. Syst. Veg. Mant. 2: 248. 



1824. 



Panicum nitidum densiflorum Rand & Redfield, Fl. Mt. Desert 174. 1894. 



Panicum Eatoni Nash, Bull. Torrey Club 25: 84. 1898. 



Panicum octonodum J. G. Smith; Scribn. Bull. U. S. Dep. Agr. Agrost. 17: 73. 1899. 



Panicum paucipilum Nash, Bull. Torrey Club 26: 573. 1899. 



Panicum nitidum octonodum Scribn. & Merr. Bull. U. S. Dep. Agr. Agrost. 24: 34. 1901. 



Vernal culms tufted, 30-90 cm. high, erect or slightly decumbent at base, sometimes sending 

 out rootlets from the lower nodes, glabrous, the nodes swollen; leaf-sheaths loose, shorter than 

 the internodes, usually ciliate on the margin toward the summit, otherwise glabrous, or the 

 lower sometimes slightly pubescent; ligule 2-3 mm. long; blades firm, ascending or often re- 

 flexed, 7-10 cm. long, 4-8 mm. wide, sparingly long-ciliate at the rounded base, otherwise 

 glabrous; panicles 8-12 cm. long, one fourth to one third as wide, rather densely flowered, the 

 branches ascending or appressed, with short spikelet-bearing branchlets in the axils; spikelets 

 1.4^1.6 mm. (usually 1.5 mm.) long,- 0.7-0.9 mm. wide, elliptic, obscurely pointed; first glume one 

 fourth to one third the length of the spikelet, obtuse or subacute; second glume and sterile 

 lemma equaling the fruit at maturity, pubescent or rarely glabrous; fruit 1.3 mm. long, 

 0.7-0.8 mm. wide, elliptic, slightly pointed. 



