118 BROOKLYN BOTANIC GARDEN MEMOIRS 
Eugenia sessiliflora Vahl 
Chrysophyllum Eggersti Pierre 
Forestiera Eggersiana Krug & Urban 
Salvia thomasiana Urban 
Physalis Eggersit O. E. Schulz 
Solanum conocarpum L. C. Rich. 
Wedelia cruciana L. C. Rich. 
Phascum sessile E. G. Britton 
Anthracothecium Breutelii Muell. Arg. 
Lecania euthallina Riddle 
Caloplaca subsequestra (Nyl.) Riddle 
Buellia prospersa (Nyl.) Riddle 
Mycoporellum ellipticum Muell. Arg. 
: The endemic elements are, then, only about 2.6 percent. of the 
native flora. A few other species are almost endemic, being otherwise 
known only on Porto Rico or on some other neighboring island. 
There are a few endemic species known on Tortola, and one on Anagada, 
but if the native species of these two islands, additional to those of St. 
Thomas, St. Jan and St. Croix, were taken into account, the percentage 
_ of endemism would not be increased. 
Porto Rico, with a very much greater area and much higher moun- 
tains, has about 13 percent of its species of Spermatophyta and Pteri- 
_dophyta endemic. 
