610 



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



puberulent; racemes 1 or 2, 7 to 14 

 cm. long; spikelets usually 2.2 to 2.4 

 mm. long, obovate-elliptic, glabrous 

 or nearly so, rarely pubescent. 91 

 — Sand barrens and high pineland, 

 North Carolina and peninsular Flor- 

 ida to Texas. 



6. Dimorphostachys. — Inflorescence 



terminal and axillary; racemes 



one to few, slender; spikelets in 



pairs, the first glume usually 



developed on one of the pair, 



often on both, or sometimes 



obsolete on both. 



22. Paspalum unispicatum (Scribn. 



and Merr.) Nash. (Fig. 883.) Culms 



1 to few in a tuft from horizontal 



scaly rhizomes, erect or ascending, 



50 to 80 cm. tall, simple or with a 



Figure 881. — Paspalum propinquum. Two views of 

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



Figure 882. — Paspalum rigidifolium. Raceme, X 1 ; 

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



subacute. % — Sandy savannas 

 and sand barrens overlying lime- 

 stone, peninsular Florida; West In- 

 dies; Veracruz, Mexico, to Panama. 

 21. Paspalum rigidifolium Nash. 

 (Fig. 882.) Culms erect, rather stiff, 

 purplish, 25 to 75 cm. tall; sheaths 

 glabrous or the lower grayish-pubes- 

 cent; blades firm, linear, mostly 10 

 to 15 cm. long, 2 to 5 mm. wide, 

 usually not wider than the summit 

 of the sheath, glabrous or minutely 



Figure 883. — Paspalum unispicatum.. Raceme, X 1; 

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



