604 



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



veloped; second glume appressed- 

 pubescent, the midnerve in glume and 

 sterile lemma developed. % — 

 Ditches and wet, rarely brackish 

 places, New Jersey to Florida and 

 Texas, Tennessee, and Arkansas, 

 west to California and north along 

 the coast to Washington; Idaho; 

 south to Argentina; warm coasts of 

 the Eastern Hemisphere. 



Paspalum paucispicatum Vasey. 

 Resembling vigorous specimens of P. 

 distichum, but with 3 to 5 racemes 

 with mostly paired spikelets. % — 

 A specimen collected by Palmer in 

 1888, said to be from "Southern Cali- 

 fornia," is in the United States Na- 

 tional Herbarium. The locality is 

 doubtful, the species ranging from 

 Sonora to Oaxaca. 



3. Livida. — Culms compressed; ra- 

 cemes few to several, mostly 

 plants of alkaline soil. 



6. Paspalum pubiflorum Rupr. ex 

 Fourn. (Fig. 867.) Culms decumbent 

 at base, 40 to 100 cm. tall; sheaths, 

 at least the lower, sparsely papillose- 

 pilose; blades flat, usually 10 to 15 

 cm. long, 6 to 14 mm. wide, usuallj r 

 with a few stiff hairs at the rounded 

 base; racemes mostly 3 to 5, 2 to 10 

 cm. long, rather thick, erect to spread- 

 ing, the rachis 1.2 to 2 mm. wide; 

 spikelets obovate, pubescent, about 3 

 mm. long. % (P. hallii Vasey and 

 Scribn.) — Moist open ground, banks, 

 low woods, along streams and irriga- 

 tion ditches, especially in alkaline 

 clay soil, Louisiana and Texas; Mex- 

 ico and western Cuba. 



Paspalum pubiflorum var. gla- 

 brum Vasey ex Scribn. Somewhat 

 more robust, the sheaths less pilose, 

 the racemes commonly longer and 



Figure 867. — Paspalum pubiflorum. Panicle, X 1; 

 two views of spikelet, and floret, X 10. (Hitchcock 

 5555, Mex.) 



Figure 868. — Paspalum lividum. Panicle, X 1: two 

 views of spikelet, and floret, X 10. (Arsene 3176, 

 Mex.) 



