22 BROOKLYN BOTANIC GARDEN MEMOIRS 



are those of Von Rohr and of Ryan, made about 1780, and preserved 

 for the most part in the herbarium of the Botanical Museum at Copen- 

 hagen, where the most complete and extensive collections from these 

 islands are to be found. 



Px'ior to 1800 collections were made by L. C. M. Richard, Isert, 

 West, Pflug, Ledru and Riedle. During the nineteenth century the 

 principal collectors were Benzon, Bertero, Ravn, Hornbeck, Ehren- 

 berg, Breutel, Krebs, Oersted, Holton, Eggers, Krause, Warming, 

 Borgesen, Paulsen, A. E. Ricksecker, Mrs. J. J. Ricksecker, Otto 

 Kuntze and Millspaugh. Since 1900 collections have been made 

 by N. L. Britton, Mrs. Britton, J. F. Cowell, Miss Marble, J. A. Shafer 

 and J. N. Rose. 



A collection made by Kirkman Finley in Trinidad was erroneously 

 labeled as from St. Thomas, and many errors have been made in citing 

 these specimens. A few plants collected by Kuntze in Porto Rico 

 have been erroneously recorded as from St. Thomas, and many col- 

 lected by Riedle on Porto Rico have been similarly erroneously re- 

 corded. Conversely, some plants collected by Purdie on St. Thomas 

 have been cited as Jamaican. 



For the purposes of the following list of plants I have examined 

 the literature and have studied the following series of specimens: 



1. Duplicates of plants collected by Benzon, Hornbeck, Eggers 

 and Paulsen, received by the New York Botanical Garden in exchange 

 with the Copenhagen Botanical Museum. 



2. The collection made by I. F. Holton on St. Thomas, preserved 

 in the herbarium of Columbia University. 



3. Dr. Otto Kuntze 's St. Thomas plants, which came to the New 

 York Botanical Garden as a part of his herbarium, presented by Mr. 

 Andrew Carnegie. 



4. The St. Croix collections made by Mr. Ricksecker and a portion 

 of that made by Mrs. Ricksecker in the herbarium of the New York 

 Botanical Garden and parts of the complete sets preserved in the 

 herbarium of The Field Museum of Natural History. 



5. Part of the St. Thomas collection made by Dr. Millspaugh. 



6. The St. Croix collection made by Mr. Cowell and myself in 1900. 



7. The collections made by Dr. Rose, assisted by Mr. Fitch and 

 Mr. Russell on St. Croix in 1913. 



8. The collection made on St. Thomas by Mrs. Britton and Miss 

 Marble in 1913. 



9. The collection made by Dr. Shafer and myself on St. Thomas, 

 St. Jan and small adjacent islands in 19 13. 



Mrs. Britton has contributed the catalogue of the mosses, Dr. 

 Evans that of the hepatics, and Professor Riddle that of the lichens. 



