Figure 1073. 



MANUAL OF THE GRASSES OF THE UNITED STATES 



utely papillose-roughened, rela- 

 tively thin in texture. 

 164. Panicum hians Ell. (Fig. 



1073.) Culms 20 to 60 cm. tall, mostly 



erect, sometimes more or less decum- 

 bent or prostrate with erect branches; 



blades 5 to 15 cm. long, 1 to 5 mm. 



wide, flat or folded, pilose on the up- 

 per surface near base; panicles 5 to 



20 cm. long, usually loose and open, 



the primary branches few, slender, 



distant, spreading or drooping, the 



branchlets borne on the upper half or 



towards the ends only; spikelets in 



more or less secund clusters, 2.2 to 2.4 



mm. long, at maturity about twice as 



thick as wide. % — Damp soil 



along ponds and streams, Virginia to 



Florida and New Mexico; Tennessee; 



Oklahoma and southern Missouri; 



Mexico. 



703 



-Panicum hians. Spikelet and floret 

 X 10. (Type.) 



13. Verrucosa. — Glabrous branching 

 annuals; culms slender, weak, de- 

 cumbent at base, usually with 

 stilt-roots; ligules minute; pan- 

 icles with divaricate capillary 

 branches, spikelet-bearing to- 

 ward the ends, the spikelets 

 mostly in tAvos; spikelets tuber- 

 culate, nerves obscure or obso- 

 lete; first glume minute; fruit 

 minutely papillose, margin of the 

 lemma inrolled only at base. 



165. Panicum verrucosum Muhl. 

 (Fig. 1074.) Bright green, at first 

 erect, later widely spreading; culms 

 20 to 150 cm. long; blades thin, flat, 

 lax, 5 to 20 cm. long, 4 to 10 mm. 

 wide; panicles 5 to 30 cm. long, about 

 as wide, diffuse, small panicles often 

 produced at the lower nodes; spike- 

 lets 1.8 to 2.1 mm. long, elliptic- 

 obovate, subacute, roughened with 

 small warts. O — Wet, mostly 

 shady soil, Massachusetts to Florida, 

 west to Michigan, Kentucky, Arkan- 

 sas and Texas. 



166. Panicum brachyanthum 

 Steud. (Fig. 1075.) Culms 30 to 100 

 cm. tall; blades 5 to 15 cm. long, 2 

 to 3 mm. wide; panicles 5 to 15 cm. 

 long, the branches few; spikelets 3.2 

 to 3.6 mm. long, fusiform, acute, tu- 



Figttre 1074. — Panicum verrucosum. Two views of 

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



Figure 1075. — Panicum brachyanthum. Two views of 

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



berculate-hispid. O — Sandy soil, 

 Arkansas, Louisiana, Texas, and Ok- 

 lahoma. 



14. Urvilleana. — Robust perennials; 



spikelets large, densely villous; 



fertile lemma long-villous on the 



margin. 

 167. Panicum urvilleanum Kunth. 

 (Fig. 1076.) Culms solitary or few in 

 a tuft, 50 to 100 cm. tall, erect from 

 a creeping rhizome; nodes densely 

 bearded; sheaths overlapping, densely 

 retrorse-villous; blades elongate, 4 to 

 7 mm. wide, tapering from a flat base 



