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



17. Latifolia. — CuJms rather stout, erect or suberect; Jigules not more 



than 1 mm long; blades cordate, clasping; spikelets rather turgid, 



7- to 9-nerved, pubescent. Autumnal phase usually rather 



sparingly branching. 



108. Panicum clandestinum L. (Fig. 1462.) Vernal culms in 



large dense clumps, sometimes with strong rhizomes 5 to 10 cm long, 



Figure 1458.— Distribution of 

 Panicum mutabile. 



Figure 1459.— Panicum joorii. Two 

 views of spikelet, and floret, X 10 

 (Type.) 



70 to 150 cm tall, scabrous to papillose-hispid at least below the nodes; 

 sheaths strongly papillose-hispid to nearly glabrous; blades spreading 

 or finally reflexed, 10 to 20 cm long, 1.2 to 3 cm wide, scabrous on both 



Figure 1460.— Distribution of 

 Panicum joorii. 



Figure 1461. — Panicum equilaterale. Two 

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



surfaces, at least toward the end, usually cilia te at base; panicle 8 to 15 

 cm long; spikelets 2.7 to 3 mm long. Autumnal culms erect or lean- 

 ing, the branches leafy, the swollen bristly sheaths overlapping and 

 wholly or partly enclosing the panicles. Ql — Moist mostly sandy 



Figure 1462.— Panicum clandestinum. 

 Two views of spikelet, and floret, X 10. 

 (Torrey, N.Y.) 



Figure 1463.— Distribution of 



Panicum clandestinum. 



ground, Nova Scotia and Quebec to Kansas, south to northern 

 Florida and Texas (fig. 1463). 



109. Panicum latifolium L. (Fig. 1464.) Vernal culms from a 

 knotted crown; culms 45 to 100 cm tall, glabrous or the lower part 



