120 



Papers from the Department of Marine Biology. 



LOGGERHEAD KEY. 



This is the largest of the Tortugas group and also the highest above 

 sea-level and according to tradition it had in earlier times the largest 

 stand of trees. Old fishermen (and the report was current in the times 

 of the older light-house keepers) state that 75 or 80 years ago this 



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Agave rigida. 

 Aloe sp. 



Asparagus sprengeri. 

 Boerhaavia viscosa. 

 Cakile lanceolata. 

 Calonyction tuba. 

 Canavali lineata. 

 Capraria biflora. 

 Carica papaya. 

 Casuarina equisetifolia. 

 Cenchrus echinatus. 

 Cer.chrus incertus. 

 Cerbera thevetia. 

 Chamaesyce buxifolia. 

 Cocolobis uvifera. 

 Cocos nucifera. 

 Cyperus brunneus. 

 Ficus hispida. 

 Hibiscus rosa-sinensis. 

 Hymenocallis caymanensis. 

 Ipomoea pes-caprae. 

 Iva imbricata. 

 Melanthera brevifolia. 

 Nerium oleander. 

 Opuntia dillenii. 

 Paspalum caespitosum. 

 Pedilanthus tithymaloides. 

 Poinsettia cyathophora. 

 Poinsettia pinetorum. 

 Portulaca oleracea. 

 Salvia serotina. 

 Scaevola plumieri. 

 Sebesten sebestina. 

 Sesuvium portulacastrum. 

 Sporobolus virginicus. 

 Suriana maritima. 

 Thespesia populnea. 

 Tournefortia gnaphalodes. 

 Uniola paniculata. 

 Vinca rosea. 

 Yucca aloifolia. 



Loggerhead Key, showing buildings of the laboratory on the north end and of the 

 light-house on the south. Walks and paths are indicated by lines. One inch 

 = one-fifth statute mile. 



island, as well as Garden Key and others of the group, supported 

 a large stand of old white button wood trees, Conocarpus erectus L. 

 These were largely cut down by fishermen, who occasionally camped f or 

 perhaps several weeks or months in the Tortugas; fires also are said to 

 have had their share in devastating this old silvan flora. The central 

 group of very old and large buttonwood trees in the parade-ground 

 of Fort Jefferson on Garden Key is the only remnant of this supposed 

 aboriginal silvan flora. 



