BRITTON: FLORA OF THE VIRGIN ISLANDS 117 



The Algal Vegetation of the Lagoons in the Danish West Indies. Biol. 



Arbejd. tilegn. Eug. Warming. 41-45. Figs. 1-9. 191 1. 



Two Crustaceous Brown Algae from the Danish West Indies. Nuova Notar- 



isia23: 123-129. Figs. 1-3. 1912. 



The Species of Sargassum Found along the Coasts of the Danish West Indies, 



with Remarks upon the Floating Forms of the Sargasso Sea. 1-20. Figs. 

 1-8. 1914. [No. 32 of a Mindeskrift for Japetus Steenstrup.] 



Cleve, Peter Theodor. Diatoms from the West Indian Archipelago. [Virgin Islands 

 and St. Bartholomew.] Bih. Svens. Vet. Akad. Hand!. 5 8 : 1-22 pi. 1-5. 

 1878. Annot. list. 



Dickie, George. Marine Algae Collected at St. Thomas during the Expedition of 

 H. M. S. "Challenger." Jour. Linn. Soc. Bot. 14: 312-313. 17 O 1874. 

 List. 



Millspaugh, C. F. Flora of the Island cf St. Croix. 'Field Col. Mus. Bot. 1: 441- 

 546. 1902. On pp. 467, 468 is a list of 17 species of marine algae, deter- 

 mined by Professor W. G. Furlow. 



Vahl, M. Endeel Kryptogamiske Planter fra St. Croix. Skrivt. Naturh. Selsk. 

 5 2 : 29-47. 1802. 



ENDEMIC SPECIES 



The approximate number of species native to the islands as re- 

 corded, excluding fungi and algae, is 1,052, as follows: 



Spermatophyta 890 



Pteridophyta 41 



Bryophyta 46 



Lichenes 75 



1,052 



The numbers of Spermatophyta and Pteridophyta are not likely 

 to be increased by further exploration, but there are probably some 

 more Bryophyta and many more lichens to be obtained. As we know 

 the flora at the present time, the following 27 species are endemic, at 

 least to the Virgin Island group as a whole. 



Valota Eggersii (Hack.) Hitchc. & Chase 

 Agave Eggersiana Trelease 

 Peperomia myrtifolia (Vahl) A. Dietr. 

 Pilea Richardi Urban 

 Coccolobis Klotzchiana Meissn. 

 Zanthoxylum thomasianum Krug & Urban 

 Galactia Eggersii Urban 

 Malpighia pollens Small 

 Malpighia infestissima (Juss.) Rich. 

 Maytenus cymosa Krug & Urban 

 Reynosia Guama Urban 

 Sida Eggersii E. G. Baker 

 Psidinm amplexicaule Pers. 

 Calyptranthes thomasiana Berg. 



