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



of the staminate floret as long as the 

 lemma; grain ovoid, about 0.5 mm. 

 long; anthers before dehiscing, 1.5 

 to 2 mm. long. O (E. capitata 

 Nash.) — River banks, sandy land, 

 and open ground, Kentucky to South 

 Dakota and Texas; Florida. 



11. Eragrostis hypnoides (Lam.) 

 B. S. P. (Fig. 196.) Annual, branch- 

 ing, creeping, and matlike as in the 

 preceding; blades scabrous or pubes- 

 cent on the upper surface; panicles 

 elliptic, loosely few-flowered, 1 to 5 

 cm. long, sometimes somewhat capi- 

 tate; spikelets several- to many- 

 flowered, linear, mostly 5 to 10 mm. 

 long, sometimes as much as 2 cm. 

 long in a dense cluster; flowers per- 

 fect; lemmas glabrous, acute, 1.5 to 

 2 mm. long; palea about half as 

 long as the lemma; grain 0.5 mm. 

 long; anthers about 0.2 mm. long. O 

 — Sandy river banks and wet ground, 

 Quebec to Washington, south through 

 Mexico and the West Indies to 

 Argentina; not found in the Rocky 

 Mountains. 



12. Eragrostis simplex Scribn. (Fig. 

 197.) Annual; culms spreading to 

 suberect, 10 to 30 cm. tall; blades 

 flat, 1 to 3 mm. wide; panicle narrow, 

 5 to 20 cm. long, the main axis often 

 curved, the branches solitary, distant, 

 ascending or spreading, sometimes 

 reflexed, floriferous to base, short, 

 with a few crowded spikelets or as 

 much as 5 cm. long, with short 

 branchlets; spikelets nearly sessile, 

 linear, mostly 20- to 50-flowered, 5 

 to 20 mm. long; lemmas closely im- 

 bricate, ovate, acute, 1.5 to 2 mm. 

 long, the lateral nerves near the 

 margin; grain about 0.5 mm. long, 

 anthers about 0.1 mm. long. O 

 — Sandy woods, dooryards, and waste 

 places, southern Georgia, Florida, 

 and Alabama. 



13. Eragrostis unioloides (Retz.) 

 Nees. (Fig. 198.) Annual; culms 

 erect or ascending, 20 to 40 cm. tall; 

 blades flat, 2 to 4 mm. wide; panicle 

 elliptic, open, 10 to 15 cm. long, about 

 half as wide, the branches ascending; 



Figure 198. — Eragrostis unioloides. Spikelet, X 10. 

 (Curtiss 6898, Fla.) 



Figure 197. — Eragrostis simplex. Panicle, 

 floret, X 10. (Curtiss, Fla.) 



X 



