320 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



lets and the description states that the fruit is dark, both these characters 

 indicating P. virgatum. In any case Grisebach's varietal name would be, be- 

 cause of P. stramineum Nash, untenable for a species. Paspalum secans is 

 based on the Porto Rico collections ; the Jamaica form may possibly be dis- 

 tinct. 



Hitchcock * refers this species to P? virgatum schreberianum Fliigge, de- 

 scribed from South America, and Nash a to P. schreberianum. We have not 

 seen Fliigge's specimen, but his description, " spikes about thirty, the rachis 

 margin subpilose, spikelets glabrous," applies to our species only in the last 

 character. Furthermore P. secans is not known from the continent, but from 

 the West Indies only. 



Bahamas (Inagua, New Providence), Cuba, Jamaica, Porto Rico (frequent 

 throughout), St. Croix, and Antigua. fjcb6&- &k^-o<~~ %^Z^ 



54. Paspalum rnillegrana Schrad. in Schult. Mant. 2: 175. 1824. 

 Paspalum underwoodii Nash, Bull. Torrey Club 30: 375. 1903. 



In large strong-rooted clumps, commonly 1.5 meters tall; lower sheaths 

 nodulose, much overlapping; blades partially conduplicate, narrower, stiffer, 

 and more scabrous than those of P. virgatum, often finely pubescent on the 

 upper surface; racemes usually numerous, rather aggregated, ascending, the 

 glabrous paired crowded spikelets usually glaucous-purplish or lead color, 2 to 

 2.2 mm. long, obovate-suborbicular, sometimes almost obcordate and apiculate. 



Open mostly moist grounds, Bahamas and the Greater Antilles to southern 

 Brazil. Originally described from Brazil. The type specimen has not been 

 examined, but this is the only Brazilian species known to us answering the de- 

 scription, the characters " obovate-orbicular. glabrous, densely imbricate " ap- 

 plying particularly well to the spikelets of this species. Paspalum undericoodii 

 was described from Porto Rico, Underivood & Griggs 149 being the type. 



Bahamas (New Providence), Cuba, Jamaica, Porto Rico (common through- 



j 

 out), Trinidad, and Tobago. 



55. Paspalum densum Poir. in Lam. Encycl. 5: 32. 1804. 



Like Paspalum rnillegrana in habit, the culms and sheaths more lush and in 

 drying more strongly nodulose ; racemes 4 to 6 cm. long, very numerous, aggre- 

 gated into an elongate-pyramidal panicle, the rachises conspicuously pilose, the 

 light brown, glabrous, densely crowded spikelets 1.8 to 2 mm. long, nearly as 

 broad. 



Wet savannas and open wet ground, West Indies, Panama, and Venezuela. 

 Originally described from Porto Rico. 



Cuba (Pinar del Rio, and Hanabana), Jamaica (parishes of Clarendon and 

 St. Catherine), Porto Rico (south and west of San Juan Bay), Guadeloupe, and 

 western Trinidad. 



56. Paspalum coryphaeum Trin. Gram. Pan. 114. 1826. 



An erect branching nearly glabrous perennial, 1 to 2 meters tall, the long flat 

 blades purplish-glaucous, especially beneath ; racemes numerous, ascending or 

 finally arching, 5 to 10 cm. long, somewhat aggregated ; rachis very slender 

 with a long tuft of hairs at the base, the light brown elliptic crowded spikelets 

 about 2 mm. long, the glume villous, the sterile lemma glabrous or obscurely 

 pubescent toward the apex; panicles of the branches much smaller than the 

 primary ones. 



Savannas, western Trinidad to Brazil. Originally described from BraziL 



^ontr. U. S. Nat. Herb. 12: 206. 1909. 

 a Fl. N. Amer. 17: 190. 1912. 



