MANUAL OF THE GRASSES OF THE UNITED STATES 



631 



minutely pubescent toward the summit. Autumnal phase decumbent 

 or finally prostrate-spreading, divaricately branching from all the 

 nodes, the branches slender, elongate. 91 Edges of cypress 

 swamps, in sphagnum bogs, and in similar moist shady places, south- 

 ern Georgia and Florida. 



7. Spreta. Culms tufted, rather stiff, mostly glabrous or nearly so; 



ligules densely hairy, 2 to 5 mm long; blades mostly firm ; spikelets 



5- to 7-nerved, mostly pubescent. Autumnal culms with rather 



short-tufted branchlets and greatly reduced leaves and panicles. 



38. Panicum spretum Schult. (Fig. 1335.) Vernal culms 30 to 90 



FIGURE 1334. Panicum sphagnicola. 

 Two views of spikelet, and floret, X 10. 

 (Type.) 



FIGURE 1335. Panicum spretum. 

 Two views of spikelet, and floret, 

 X 10. (Type.) 



cm tall, erect; sheaths glabrous; ligule 2 to 3 mm long; blades firm, 

 ascending to reflexed, 4 to 8 mm wide, sparingly ciliate around the 

 base; panicle 8 to 12 cm long, the branches ascending or appressed; 

 spikelets about 1.5 mm long, elliptic, rarely glabrous. Autumnal 

 phase mostly reclining, the early branches elongate, the subsequent 

 branches in short fascicles. 01 Wet 

 usually sandy soil, Coastal Plain, Nova 

 Scotia to Texas; Indiana (fig. 1336). 



39. Panicum lindheimeri Nash. 

 (Fig. 1337.) Vernal culms ascending 

 or spreading, 30 to 100 cm tall, the 



lower inter- 

 nodes and 

 sheaths some- 

 times ascend- 

 ing-pubescent; 

 ligule 4 to 5mm 

 long; blades 6 

 to 8 mm wide, 

 glabrous; pani- 

 cle 4 to 7 cm long, about as wide ; spike- 

 lets 1.4 to 1.6 mm long, obovate. Au- 

 tumnal phase usually stiffly spreading 



Or radiate-prostrate, with elongate in- FIGURE 1337. Panicum lindheimeri. Plant, 



ternodes and tufts of short appressed & 7chii e T4 S 49?Mis P so elet> and fl ret ' 

 branches; blades involute-pointed, 



often conspicuously ciliate at base. 21 Dry sandy or sterile woods 

 or open ground, Quebec and Maine to Minnesota, south to northern 

 Florida and New Mexico; California (fig. 1338). 



40. Panicum leucothrix Nash. (Fig. 1339.) Vernal phase light 

 olive green; culms 25 to 45 cm tall, erect or ascending, appressed papil- 

 lose-pilose, the nodes pubescent; sheaths papillose-pilose; ligule 3 mm 

 long; blades 3 to 7 mm wide, glabrous or sparsely villous on the upper 



Figure 1336. Distribution of 

 Panicum spretum. 



