.tart 5, iviDj .ruAC-t^AiS zoy 



Autumnal phase stiffly erect or ascending, the culms and sheaths sometimes papillose 



only, the branches fascicled, the reduced, crowded leaves ascending, the blades 2-3 cm. long, 



much exceeding the reduced panicles. 



Type locality: Huachuca Mountains, Arizona. * 



Distribution: Maine to South Dakota, and south to North Carolina and Arizona. 

 Illustration: Contr. U. S. Nat. Herb. 15: /. 221. 



Panicum Huachucae silvicola Hitchc. & Chase; B. L,. Robinson, Rhodora 10: 64. 1908. 

 Panicum dichotomum fasciculatum Torr. Fl. U. S. 145. 1824. Not P. fasciculatum Sw. 1788. 

 Panicum nitidum ciliatum Torr. Fl. U. S. 146. 1824. Not P. ciliatum Bll. 1816. Vernal phase 

 taller and more slender, brighter green and less densely pubescent, the blades thin, lax and spreading. 

 Some forms with the upper surface of the blades nearly or quite pubescent approach Panicum 

 tennesseense. Maine to Nebraska, south to Florida and Arizona; originally described from the 

 District of Columbia. Illustration: Contr. U. S. Nat. Herb. 15:/. 22 3. 



137. Panicum tennesseense Ashe, Jour. EHsha Mitchell Soc. 15: 52. 



1898. 



"Vernal phase suberect or stiffly spreading, bluish-green, often purplish; culms 25-60 cm. 



high, slender, papillose-pilose, or the upper portion glabrous ; leaf -sheaths spreading-pubescent, 



rarely nearly glabrous; ligule dense, 4—5 mm. long; blades firm with a thin white cartilaginous 



margin, ascending or suberect, 6-9 cm. long, 5-8 mm., rarely 10 mm. wide (the upper smaller), 



often sparsely ciliate at base, the veins usually conspicuous, the upper surface glabrous or with 



a few long, scattered hairs toward the base, the lower surface appressed-pubescent or nearly 



glabrous; panicles 4-7 cm. long, nearly as wide, rather densely flowered, the lower branches 



ascending; spikelets 1.6-1.7 mm. long, 0.8-1 mm. wide, obovate-obtuse, turgid, pubescent; 



first glume about one fourth the length of the spikelet ; second glume shorter than the sterile 



lemma, leaving the summit of the fruit exposed at maturity; fruit 1.4 mm. long, 0.8 mm. wide, 



elliptic, obtuse. 



Autumnal phase widely spreading or decumbent, with numerous fascicled, somewhat 



flabellate, branches, often forming prostrate mats; leaves much reduced, the blades usually 



ciliate at base; winter rosette formed early. 



Tyfb locality : La Vergne County, Tennessee. 



Distribution: Maine to Minnesota, and south to Alabama and Arizona; Vera Cruz. 



Illustrations: Contr. U. S. Nat. Herb. 15: /. 225; Britt. & Brown, 111. Fl. ed. 2. /. 364. 



138. Panicum lanuginosum Ell. Bot. S. C. & Ga. 1: 123. 1816. 



Panicum dichotomum lanuginosum Wood, Class Book ed. 1861. 786. 1861. 

 Panicum orangense Ashe, Jour. KHsha Mitchell Soc. 15: 113. 1899. 

 Panicum ciliosum Nash, Bull. Torrey Club 26: 568. 1899. 



Vernal phase grayish olive-green, velvety to the touch; culms tufted, usually in large 

 clumps, 40-70 cm. long, slender, lax, spreading, densely villous with fine, soft hairs arising from 

 small papillae; nodes villous, often a glabrous ring below; leaf-sheaths shorter than the inter- 

 nodes, soft- villous like the culm, or the upper puberulent only, ciliate on the margin; ligule 

 3-4 mm. long; blades thickish but not stiff, ascending or spreading, somewhat incurved or 

 spoon-shaped, 5-10 cm. long, 5-10 mm. wide (the uppermost much smaller), acuminate, 

 narrowed toward the rounded base, the margins sometimes papillose-ciliate, the upper surface 

 clothed with short soft hairs with long soft hairs intermixed, especially toward the margins 

 and base, the lower surface densely velvety-pubescent; panicles exserted, 6-12 cm. long, about 

 as wide, loosely flowered, the axis pubescent, the slender flexuous branches spreading or as- 

 cending, the lower often drooping; spikelets 1.8-1.9 mm. long, 1 mm. wide, obovate-elliptic, 

 subobtuse, pubescent; first glume one third the length of the spikelet, obtuse or obscurely 

 pointed; second glume and sterile lemma equal, slightly shorter than the fruit at maturity; 

 fruit 1.6 mm. long, 0.9 mm. wide, elliptic, subacute. 



Autumnal phase widely spreading or decumbent, freely branching from the middle nodes, 



the branches repeatedly branching and much exceeding the internodes, the ultimate branchlets 



forming flabellate fascicles; leaves and panicles much reduced, the flat blades almost always 



ciliate and exceeding the panicles; winter rosette not appearing until late, the blades 4-5 cm. 



long, usually ciliate, otherwise minutely velvety or nearly glabrous. 



Type locality: Georgia. 



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



Illustrations: Circ. U. S. Dep. Agr. Agrost. 29: /. 3; Contr. U. S. Nat. Herb. 15: /. 227; 

 Britt. & Brown, 111. Fl. 3: App. /. 266a; ed. 2. /. 365. 



