FLORA OF ST. CROIX AND THE VIRGIN ISLANDS. 19 



The following list of plants from St. Croix and the Virgin Islands 

 formed on my own collections and tlie publications or collections of other 

 botanists, comprises 1013* species of phanerogamous and vascular cryp- 

 togamous plants, of which 881 are indigenous and 132 naturalized, those 

 merely cultivated being added in brackets after each family. 



In determining the species I have, besides consulting the more im- 

 portant general systematical works on botany, as much as possible fol- 

 lowed Prof. Grisebach's standard work on the Flora of the British West 

 India Islands, to which I therefore beg to refer when no other authority 

 is given. Synonymes and references to other authors are given only 

 where it was thought desirable to supplement the Flora of Grisebachin 

 this respect. 



To the specific names of plants I have added only such statements as 

 are not given in Grisebach's work, — as local name, time for flowering, 

 technical use, as well as descriptive remarks, where my own observation 

 shows a dift'erence from the description given in the flora mentioned 

 above. 



In referring to Schlechtendal, or the herbarium of the Copenhagen 

 Museum, I have used the abbreviations Schl. and Hb. Ha^Ti. ; in quoting 

 West or Schlechtendal, their resjiective works on St. Croix and St. 

 Thomas, mentioned above, are understood to be referred to. 



Special localities for habitats are given only where a j)lant is rare, or 

 at all events uncommon ; otherwise the island alone is mentioned. 



The expression, "Alll islands," is meant to imply that the species is 

 found both in St. Croix and the Virgin group, without necessarily mean- 

 ing to say that it occurs in every island of the latter. 



In summing up the statistical results from my list of species, nearly 

 the same conclusions with regard to the most numerous families are 

 arrived at as those given in Prof. Grisebach's Geogr. Verbr. der Pflanzen 

 Westindiens, p. 73, for the Caribbean Islands. 



The proportion between Mono- and Dicotyledonous plants indigenous 

 and naturalized is L: 5.8, in the indigenous ones alone 1 : 4.9, thus show- 

 ing the plurality of the recently introduced plants to have been Dicoty- 

 ledonous. The i)roportion mentioned in the plants indigenous to the 

 islands is somewhat lower than stated by Grisebach, as cited above, to 

 be the rule in the West Indies, where it is given as 1 : 4, indicating, no 

 doubt, that the climate of St. Croix and the Virgin Islands is less moist 

 than that of the West Indies in general. 



* De Candolle (Geogr. Bot. p. 1274) gives to St. Thomas as the probable number of 

 Phanerogama only 450 ; but my list shows about 900. 



