666 MISC. PUBLICATION 200, IT. S. DEPT. OF AGRICULTURE 



Figure 1481. — Distribution of 

 Panicum dichotomiflorum. 



Figure 



wense. 



1482. — Panicum barto- 

 Two views of spikelet, 



and floret, X 10. (Type.) 



looser panicles, and in the rather less pointed spikelets about 2 mm 

 long. Intergrades with the species. © — Wet sandy or boggy 

 shores of ponds, Massachusetts, Connecticut, Long Island; Indiana. 



120. Panicum bartowense Scribn. and 

 Merr. (Fig. 1482). Resembling P. dichoto- 

 miflorum, mostly larger; culms erect, simple 



or sparingly branched 

 as much as 2 m tall 

 and 7 mm thick; 

 sheaths papillose- 

 hispid; ligule 2 to 3 

 mm long. © — Low- 

 ground often in shal- 

 low water, Florida; 

 Bahamas. 



5. Capillaria. — Branching annuals, papillose-hispid at least on the 

 sheaths; ligules 1 to 3 mm long; panicles many-flowered, mostly 

 diffuse; spikelets pointed, 7- to 9-nerved, glabrous; first glume 

 large, clasping; fruit smooth and shining, usually olive-brown at 

 maturity. 



121. Panicum flexile (Gattinger) Scribn. (Fig. 1483.) Culms slen- 

 der, erect, much branched from the base, 20 to 70 cm tall, somewhat 



hispid below, the nodes pubescent ; blades erect 

 but not stiff, glabrous or sparsely hispid, as 

 much as 30 cm long, 2 to 6 mm wide ; panicles 

 relatively few-flowered, oblong, narrow, 10 to 

 20 cm long about one- 

 third as wide; spikelets 

 3.1 to 3.5 mm long. © 

 — Sandy, mostly damp 

 soil, meadows and open 

 woods, New York and 

 Quebec to South Dako- 

 ta, south to Florida and 

 Texas ; introduced in 

 Utah (fig. 1484). 



122. Panicum gattingeri Nash. (Fig. 1485.) Culms at first erect, 

 soon decumbent and rooting at the lower nodes, papillose-hispid, m 

 robust specimens as much as 1 m long; blades 6 to 10 mm wide, 

 more or less hispid or nearly glabrous; panicles numerous, terminal 

 and axillary, oval or elliptic in outline, the terminal 10 to 15 cm long, 

 the lateral smaller; spikelets 2 mm long. © —Open ground and 

 waste places, often a weed in cultivated soil, New York and Ontario 

 to Minnesota, south to North Carolina and Tennessee (fig. 1486). 



123. Panicum philadelphicum Bernh. (Fig. 1487.) Plants light 

 yellowish green ; culms slender, usually erect, 15 to 50 cm tall, papillose- 

 hispid to nearly glabrous, more or less zigzag at base ; blades usually 

 erect, 5 to 15 cm long, 2 to 6 mm wide, rather sparsely hirsute; panicles 

 10 to 20 cm long, few-flowered, the branches solitary, rather stiffly 

 ascending, the axillary pulvini hispid; spikelets 1.7 to 2 mm long, 

 mostly in twos at the ends of the branchlets, O — Dry open or 



Figure 1483. — Panicum flexile. 

 Two views of spikelet, and 

 floret, X 10. (Type.) 



Figure 1484.— Distribution of 

 Panicum flexile. 



