622 



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



Figure 900. — Paspalum difforme. 

 Panicle, X 1; two views of spike- 

 let, and floret, X 10. (Type.) 



44. Paspalum texanum Swallen. 

 (Fig. 905.) Culms 70 to 110 cm. tall, 

 erect or ascending from long rhi- 

 zomes; sheaths much longer than the 

 internodes, glabrous or papillose- 

 hirsute toward the keeled summit, 

 the uppermost bladeless; blades elon- 

 gate, 2 to 6 mm. wide, flat, papillose- 

 hirsute or papillose only to glabrous 

 on both surfaces; racemes 4 to 6, as- 

 cending to suberect, 6 to 9 cm. long, 

 the axis 6 to 13 cm. long; spikelets 

 usually paired, 2.4 to 2.7 mm. long, 

 1.4 to 1.6 mm. wide, glabrous, the 

 pedicels often to 2 mm. long; glume 

 and sterile lemma thin, brownish, 

 covering the fruit or slightly pointed 

 beyond it, the lemma usually cross- 

 wrinkled inside the margin; fruit 2.3 

 to 2.4 mm. long, chestnut brown at 

 maturity. % — Moist ground, 

 southeastern Texas. 



45. Paspalum hydrophilum Henr. 

 (Fig. 906.) Aquatic; culms com- 

 pressed, the submerged part lush, 1 

 to 2.5 m. long, with tufts of long 

 roots at the nodes; sheaths and blades 

 glabrous, the blades flat, lax, 7 to 15 

 cm. long, 3 to 7 mm. wide, glabrous; 

 racemes 2 or 3, ascending, 5 to 10 



Figure 901. — Paspalum floridanum. Panicle, X 1; 

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

 4221, Fla.) 



