Genus 17. 



GRASS FAMILY. 



147 



29. Panicum consanguineum Kunth. Kunth's 

 Panic-grass. Fig. 339. 



Panicum villosum Ell. Bot. S. C. & Ga. 1: 124. 1817. 



Not Lara. 1791. 

 P. consanguineum Kunth, Rev. Gram. 1 : 36. 1829. 



Culms i°-2i° tall, finally much-branched, the 

 nodes densely barbed with spreading hairs ; sheaths 

 shorter than the internodes, densely villous; blades 

 erect, linear-lanceolate, the primary ones 1 i"— 3' 

 long, ii"-s" wide, those on the branches much 

 smaller, flat, usually less than 2' long; primary 

 panicle 1 4'— 3' long, oval, its branches ascending; 

 spikelets about \\" long and about i as wide, 

 broadly obovoid, densely pubescent with spreading 

 hairs. 



In dry sandy soil, southeastern Virginia to Florida and 

 Texas. June and July. 



30. Panicum Bushii Nash. Bush's Panic- 

 grass. Fig. 340. 



Panicum Bushii Nash, Bull. Torr. Club, 26: 568. 1899. 



A tufted nearly glabrous perennial. Culms about 

 1° tall, finally much-branched; blades erect, linear, 

 acuminate, very rough on the margins, ciliate at 

 the base with a few long hairs, otherwise glabrous, 

 the larger primary blades $'-4' long, ii"-2" wide; 

 panicle much-exserted, 2V-3' long, its branches 

 ascending; spikelets ii" long and about 1" wide, 

 obovoid, glabrous. 



In dry ground, Missouri. June and July. 



31. Panicum sphaerocarpon Ell. Round-fruited Panic-grass. Fig. 



Panicum sphaerocarpon Ell. Bot. S. C. & Ga. 1: 125. 1817. 



Culms generally erect, simple or somewhat branched 

 at base, io'-2° tall, smooth, or the nodes sometimes 

 pubescent. Sheaths shorter than the internodes, or over- 

 lapping, glabrous, the margins ciliate ; blades 2'-4' long, 

 2"-y" wide, acuminate, cordate-clasping at base, sca- 

 brous above, smooth beneath, the margins cartilaginous 

 and minutely serrulate, ciliate towards the base; panicle 

 ovoid, 2'-4' long, about as broad as long; spikelets less 

 than 1" long, nearly spherical or somewhat longer than 

 thick, obtuse, purple; first scale broadly ovate, obtuse; 

 third and fourth scales three to four times as long as 

 the first, suborbicular, 7-nerved; fourth scale oval, 

 obtuse, f" long. 



Dry soil, Vermont to Kansas, south to Florida, Texas and 

 Mexico, northern South America. July-Sept. 



