Affinities: Bahama Islands. 329 
forget that the limestone soil and exposure to salt, the low elevation of the 
land, the drought and wind, to which the flora is subjected would preclude 
the occurrence in the Bahama islands of many groups of plants, such as Ara- 
liaceae, Piperaceae, Selaginellaceae, Lycopodiaceae, Equisetaceae, that are 
particularly partial to certain kinds of soil, or fresh water, shade and low tem- 
perature. For example Mrs. NORTHROP found on the damp open savannas of 
Andros, a considerable number of plants confined to that environment. They 
occur on New Providence island, where similar environmental conditions are 
found. The pines and cedars are confined to the northeastern group (New 
Providence, Andros, Great Bahama, Abaco and Berry islands), while the Cacta- 
ceae are mostly southern in their distribution ‘). There are at present, as far 
as our information permits us to go, 55 endemic species reported from the 
Bahama islands°), as follows: 
Eragrostis bahamensis Hitch. Inagua. 
Thrinax bahamensis Cook. New ee Andros, Green Bay, Eleuthera, Cat, Watlings. 
Paurotis androsana Cook. Andro 
Cyclospathe Northropi Cook. Kinos, Eleuthera. 
Hymenocallis arenicola Northrop. New Providence, Andros. 
en altissimum Bateman. Cat, Eleuthera. 
gracile Lindl 
» rufum Lindl. 
bahamense Griseb. 
alien Northropiae Urban. Andros. 
Torrubia Cokeri Britton. Eleuther 
Acacia choriophylla Benth, New ER Andros. 
Pithecolobium mucronatum Britton. Long Island. 
bahamense Northrop, New Providence, Andros. 
Cassia allen Northrop. Andros. 
Caesalpinia ovalifolia Urban. New Providence, Andros. 
> lucida Urban. New Providence, Eleuthera. 
Mimosa bahamensis Benth. Fortune, Inagua 
Linum bahamense Northrop. New Pröviisee, Andros. 
Erythroxylon retienlatum Northrop. Andros. 
Buxus bahamensis Baker. New Providence, Andros, Watlings. 
Phyllanthus bahamensis Urban. Andros. 
Euphorbia cayensis Millsp. Rum and Joulters Cays. 
Salvia bahamensis Britton. New Providence. 
Croton Hjalmarsonii Griseb. Fortune, N 
Crossopetalum coriaceum Northrop. Andro 
are discolor Griseb. New ee Andros, Eleuthera, Cat, Fortune, Inagua, 
a Northropiana Urban. Andros 
, abutiloides Endl. De Pedidenee. 
i Helicteres spiralis Northrop. Kadies New Providence, Eleuthera. 
Waltheria bahamensis Britton. New Providence. 
ee » 
1) Corer, L. c. p. 200. 
2) CoRER, 1. c. p. 197. 
