PLANTS OF COZUMEL ISLAND. 109 



LILIACE.E. 



fiii. p. 365.] Smilax mexicana, Kth. 1 var. 



COMMELINACEiE, 



[iii. p. 387.] Commelina erecta, Linn A 



PALMiE. 



Thrinax, an T. parviflora, Sw. % Griseb. Fl. Brit, W. Ind. p. 515. 

 Very abundant. — Flowers only. 



T. parvijlora, Swartz, is apparently restricted to the West Indies, where it is gre- 

 garious in arid maritime districts in the Bahamas, Jamaica, and Hayti. 



CYPERACEiE. 



[iii. p. 440.] Cyperus ligularis, Linn. W. 

 [iii. p. 452.] Cyperus thyrsiflorus, Jungh. 



GRAMINEjE. 



[iii. p. 496.] Panicum sanguinale, Linn. W. 



[iii. p. 565.] Eleusine indica, Gaertn. W. 



[iii. p. 573.] Eragrostis ciliaris, Link. w. 



FILICES. 



[iii. p. 622.] Pteris aquilina, Linn., var. caudata. W. 



Altogether there are 140 flowering plants and one fern, and of these 141 species, 

 ninety are common to the West Indies and Mexico, or Central America ; nineteen, 

 including five doubtful ones, occur on the mainland, but are not known to be West- 

 Indian ; and twelve of them are essentially West-Indian species, not known to occur 

 on the mainland, at least neither in Mexico nor in Central America. Then there is 

 one south-eastern North- American species and four Old World colonists, leaving fifteen 

 not identified with any described species, though half of these are perhaps not specifi- 

 cally distinct from known plants, the specimens being imperfect. Even those described 



