MANUAL OF THE GRASSES OF THE UNITED STATES 



585 



14. Paspalum debile Michx. (Fig. 1221.) Differing from P. 

 setaceum in the stouter, more spreading culms, the foliage more 

 crowded at base, densely grayish villous, the blades on the average 

 wider: racemes more commonly 2; spikelets 1.8 to 1.9 mm long, 

 pubescent. % — Sandy, mostly dry soil, barrens and flatwoods, 

 Long Island to Florida and Texas; Mexico and Cuba (fig. 1222). 



15. Paspalum supinum Bosc. (Fig. 1223.) Culms relatively 

 stout, widely spreading, 30 to 90 cm tall; sheaths usually hirsute; 

 blades 15 to 25 cm long, 8 to 15 mm wide, hirsute; racemes usually 

 2 to 4, rarely to 6, 4 to 10 cm long; spikelets elliptic-obovate, 2 mm 



Figure 1221.— Paspalum debile. 

 Panicle. X 1: two views of spike- 

 let, and floret, X 10. (Nash 

 946, Fla.) 



Figure 1223.— Paspalum supinum. Pan- 

 icle, X 1; two views of spikelet, and floret, 

 X10. (Chase 4572 X.C.) 



Figure 1222— Distribution of 

 Paspalum debile. 



Figure 1224— Distribution of 

 Paspalum supinum. 



long, glabrous, or the glume minutely pubescent. % — Dry, sandy, 

 open ground and old fields, North Carolina to Florida and west to 

 Louisiana (fig. 1224). 



16. Paspalum psammophilum Xash. (Fig. 1225.) Forming dense 

 grayish-olivaceous mats, the culms usually prostrate, 25 to 100 cm long; 

 sheaths appressed-pubescent ; blades 4 to 16 cm long, 4 to 11 mm wide, 

 densely appressed-pubescent; racemes 1 to 3, commonly 2, 4 to 9 cm 

 long, the axillary ones wholly or partly included in the sheaths ; spikelets 

 suborbicular, 2 mm long, the glume densely pubescent. % — Dry 

 sandy soil, mostly near the coast, Massachusetts to New Jersey 

 (fig. 1226). 



17. Paspalum stramineum Nash. (Fig. 1227.) Yellowish green, 

 the culms erect, 40 to 100 cm tall; blades 6 to 25 cm long, rarely longer, 



