*■ 



*, 



* 



fr 



Plants around Wilmington^ N. C. 135 



of S. Carolina ; but there is no specimen of it in Elliott's 

 Herbarium. 



Aristida stricta, MubL Gram, appears to be A. spici- 

 fonnls, Ell. It may be proper to add that A. gracilis, 

 Ell. is A. longespica^ Poir. 



I 



(43) Aristida virgata^ Trin. Culm 2-4 feet high, 

 leafy to half its height^ simple, glabrous, slightly com- 

 pressed ; Leaves 5-8 inches long, linear, flat, 1-2 lines 

 wide, scabrous on the upper surface, attenuated to a 

 point; Sheaths short, smooth, striate; Panicle appress- 

 ed; Calyx longer than the corol, valves acute, subequal, 

 the lower shortest by position, scabrous on the keel ; 

 Awns expanding, the middle one a third or one half long- 

 est, and three times as long as the coroL 



The sides of the calyx valves split with age, which 

 gives them the appearance of being 3 awned. Flowers 

 twice as large as A. stricta, to which this has a general 

 resemblance, but does not grow in tufts like that. A. 

 purpurascens and A. lanosa have the upper valve of the 

 calyx shortest ; in A. stricta and A. virgata it is longest. 



Hab. sandy barrens. Flowers August and Septem- 



ber. 



I have had this in manuscript for two years, when, 

 just on the eve of. its publication, Dr. Torrey has found 

 it already taken up by Trinius, Diss. Gram. Sec. who 

 received it from North America. 



(44) Cenchrus incertus. Stem 2-3 feet high, branch- 

 ing at every joint, erect, or decumbent at base, rooting 

 from the lower joints ; Sheaths open, longer than the 

 joints ; Spikes exceeding the sheaths, 10-20 flowered ; 

 Involucres pubescent, about 10 splned, containing 2 



spikelets ; Spikelets 2 flowered, one bermaphrodite, the 

 other staminate: Calvx erluraes unequal, shorter than the 



■•m '■' 



-JF^ 



