352 PLANT LIFE OF ALABAMA. 



Panicum dichotomum L. Sp. PL 1 : 58. 1753. FORKED PANICUM. 



Ell. Sk. 1 : 124. Gray, Man. ed. 6, 633. Coulter, Contr. Nat. Herb. 2 : 506. Britt. 

 & Brown, III. Fl. 1:120. 



Alleghenian to Louisianiau area. Canada, throughout the eastern United States, 

 west to Texas. 



ALABAMA : Over the State, scattered in dry and damp soil. June ; frequent. 



Type locality: "Hab. in Virginia." 



Herb. Geol. Surv. Herb. Mohr. 



Panicum thurowii Scribn. & Smith, Circ. U. S. Dept. Agr. Div. Agrost. 16 : 5. 1899. 



A rather stout, erect or ascending, pubescent or villous, simple or sparingly 

 branched perennial, 12 to 16 inches high, with 5 or 6 densely white-bearded nodes, 

 sparingly villous sheaths, lanceolate-linear leaves 2.7 to 3.9 inches long, and ovate- 

 pyramidal, shortly exserted panicles, 2.7 to 3.1 inches long. Sheaths shorter than 

 the villous internodes, striate and tuberculate above between the stria*; ligule a 

 ring of stiff white hairs 1.4 to 1.6 lines long; leaf-blades ilat, 3.2 to 4.6 lines wide, 

 softly pubescent on the lower surface, glabrous above, unusually ciliate on the 

 scabrous margins toward the base. There is a very densely villous line on the back 

 where the blade joins the sheath. Axis of the panicle sparingly pilose ; the branches 

 subflexuous, villous at the base. Spikelets narrowly elliptical, obtuse, .7 to .9 lines 

 long. First glume one-iifth the length of the 7-nerved, pubescent, and obtuse second 

 and third glumes, which are slightly shorter than the lanceolate elliptical, acute 

 floral glume. 



Very closely related to Panicum pubescens Lam., differing in its more densely 

 flowered narrower panicles, smoother spikelets, and simple culms. The leaves and 

 spikelets are purplish. 



Louisianian area. Texas, Florida (Lake County). 



ALABAMA: Coast plain. Open pine woods, vicinity of Mobile, June, 1897. 



Type locality: "Walker County, Tex." (F. W. Thuroiv, May, June, 1898, Nos. 9 

 and 11). 



Panicum barbulatum Michx. Fl. Bor. Am. 1:49. 1809. BEARDED PANICUM. 



Panicum nitidum larlulatum Chap. Fl. ed. 3, 586. 1897. 



Ell. Sk. 1 : 127. Chap. 1. c. Scribner, Grass. Tenn. 2 : 54. 



Carolinian and Louisianian areas. New York and New Jersey, south to Florida, 

 west to Mississippi. 



ALABAMA: Over the State. In damp sandy soil. Rare in the mountain region, 

 frequent near the coast. Mobile County. 



Type locality: " Hab. in Carolina." 



Herb. Geol. Surv. Herb. Mohr. 



Panicum haemacarpon Ashe, Journ. Elisha Mitchell Soc. 15:55. 1898. 



A somewhat tufted, erect, rather stout perennial, with the culm ascending from 

 the geniculate base, 12 to 18 inches high, at the base villous with spreading hairs, 

 sinoothish above ; leaves erect, ascending, 1 to 2 inches long, 2 to 3 lines wide, lanceo- 

 late, the middle ones largest, more or less pubescent with scattered hairs; sheaths 

 shorter than the iuternodes, papillate-viHous with long, soft, spreading hairs; nodes 

 bearded; panicle 1 to 2 inches long, broader than long, wide-spreading, rather few- 

 flowered ; spikelets generally red, 1 line long, broadly obovate ; first glume one-third 

 as long as the pubescent second and third. 



Carolinian and Louisianian areas. District of Columbia, North Carolina, Iowa 



ALABAMA: Coast plain. Dry open woods. Mobile. 



Type locality: ''District of Columbia, Kearney, 1897; Ashe, North Carolina, 

 Chapel Hill, 1898; Iowa, Carver." 



Herb. Geol. Surv. Herb. Mohr. 



Panicum pseudopubescens Nash, Bull. Torr. Club, 26:577. 1899. 



A densely pubescent perennial, the culms 8 to 16 inches high, branched hirsute 

 with ascending hairs, the nodes barbed; leaves rather firm, lanceolate, serrulate, 

 rough on the margins, 2 to 4 inches long and 3 to 5 lines wide, densely hispid on 

 the lower surface and above with spreading hairs; panicle exserted, broadly ovate, 

 2 to 3 inches long, sparsely hairy; spikelets about 1 line long, obovate, first glume 

 about one-third as long; spikelets ovate, pubescent with spreading hairs. 



Carolinian and Louisianian areas. 



ALABAMA : Mountain region to Lower Pine belt. Dry and damp open woods. Cull- 

 man County. Lee County, Auburn (Baker $ Earle). Mobile County, Springhill, 

 Citronelle. May, June; frequent. 



Type locality: "Auburn, Lee County, Ala." (Raker $ Earle, No. 1537, etc.) 



Distinguished from P. pubescens by its much larger spikelets. 



