658 



MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Figure 959. — Panicum lanuginos-um. Plant, X 1; two views of spikelet, and floret, X 10. (Hitchcock, N. C.) 



with a glabrous ring below the villous 

 nodes; ligule 3 to 4 mm. long; blades 

 thickish but not stiff, somewhat in- 

 curved or spoon-shaped (when fresh), 

 5 to 10 cm. long, 5 to 10 mm. wide; 

 panicle 6 to 12 cm. long, the axis 

 pubescent; spikelet s 1.8 to 1.9 mm. 

 long. Autumnal culms widely spread- 

 ing or decumbent, freely branching 

 from the middle nodes, the branches 

 repeatedly branching and much ex- 

 ceeding the internodes, the ultimate 

 branchlets forming flabellate fascicles. 

 % — Moist sandy woods, Coastal 

 Plain, New Jersey to Florida, Ten- 

 nessee, Arkansas, and Texas. The 

 plants have much the habit and pubes- 

 cence of P. scoparium, but much 

 smaller and more slender. 



cm. tall, geniculate, widely spreading, 

 soon becoming branched and de- 

 cumbent; ligule 3 to 4 mm. long- 

 blades 3 to 7 cm. long, 3 to 5 mm. 

 wide; panicle 3 to 5 cm. long, the 

 axis velvety; spikelets 1.3 to 1.4 mm. 

 long. Autumnal culms early becoming 

 diffusely branched at all the nodes, 

 prostrate-spreading, forming large 

 mats, the branches curved upward 

 at the ends. % — Sandy pine and 

 oak woods, Coastal Plain, Massa- 

 chusetts to northern Florida, West 

 Virginia; Arkansas and Texas; Indi- 

 ana, near Lake Michigan, and Emmet 

 County, Iowa. 



Figure 960. — Panicum auburne. Two views of spike- 

 let, and floret, X 10. (Type.) 



51. Panicum auburne Ashe. (Fig. 

 960.) Vernal phase grayish velvety- 

 villous throughout; culms 20 to 50 



Figure 961. — Panicum thurowii. Two views of spike- 

 let, and floret, X 10. (Type.) 



52. Panicum thurowii Scribn. and 

 Smith. (Fig. 961.) Vernal phase bluish 

 green but drying olive; culms 35 to 

 70 cm. tall, erect or ascending, vil- 

 lous, the nodes bearded, usually with 



