GENUS 17. 



GRASS FAMILY. 



'45 



23. Panicum Bicknellii Nash. Bicknell's 

 Panic-grass. Fig. 333. 



Panicum Bicknellii Nash. Bull. Torrey Club, 24: 193. 

 1897. 



Culms erect or decumbent at the base, slender, 

 8'-i6' tall, at length sparingly branched, the lower 

 internodes puberulent, the nodes sparingly barbed. 

 Sheaths generally longer than the internodes, cili- 

 ate on the margins, the lowermost pubescent ; ligule 

 a fringe o,f very short hairs ; blades elongated, in- 

 creasing in length toward the top of the culm, erect, 

 linear-lanceolate, acuminate, narrowed toward the 

 ciliate base, 7-9-nerved, primary leaves 3'-7' long, 

 2$"-s" wide ; primary panicle 2\'-$' long, its branches 

 ascending, secondary panicles smaller, with appressed 

 branches; spikelets obovate or oval, ii"-ii" long, 

 pubescent with short spreading hairs, the first scale 

 i-nerved, the second and third scales Q-nerved. 



Dry wooded hills, Connecticut, New York and Penn- 

 sylvania to Georgia. July-Aug. 



24. Panicum ciliatum Ell. Dwarf Panic- 

 grass. Fig. 334. 



P. ciliatum Ell. Bot. S. C. & Ga. 1 : 126. 1817. 



Plant yellowish green. Culms tufted, 4'-7' tall, 

 simple, glabrous ; sheaths shorter than the internodes, 

 ciliate on the margin, otherwise glabrous ; blades up 

 to 2$' long, 2j"-5" wide, glabrous on both surfaces, 

 conspicuously ciliate, somewhat crowded at the base, 

 narrowly elliptic, linear or lanceolate; panicle i'-2' 

 long, broad, open, its axis and spreading branches 

 hirsute ; spikelets about i" long and 4 as wide, 

 elliptic, pubescent with short spreading hairs, rarely 

 nearly glabrous. 



In sandy soil, southeastern Virginia to Florida and 

 Mississippi. May to July. 



25. Panicum strigosum Muhl. Rough-hairy 

 Panic-grass. Fig. 335. 



Panicum strigosum Muhl. ; Ell. Bot. S. C. & Ga. i : 126. 



1817. 



Panicum longipeditnculatum Scribn. Bull. Univ. Tenn. Exp. 

 Sta. 7: 53. 1894. 



Culms 8'-i8' tall, simple, tufted, hirsute; leaves 

 crowded at the base of the culm ; sheaths much shorter 

 than the internodes, hirsute; blades i'-3' long, 3"-4i" 

 wide, erect, lanceolate, papillose-ciliate on the margins, 

 long-hirsute on the surface; panicle much-exserted, 

 i $'-3' long, the axis long-hirsute, open, its branches 

 spreading or ascending ; spikelets I" long or a little 

 less, oval, glabrous. 



Sandy woods, southeastern Virginia to Tennessee, 

 Florida and Louisiana. Also in Cuba, Mexico and Guate- 

 mala. May-Aug. 



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