156 



ent are the views of botanists on this subject. M. Unger's 

 opponents are however able to mention as many facts against 

 this dependence of plants on the geognostic character of the 

 soil as M. Unger has advanced in support of it. 



I can only mention the interesting and important memoir 

 of Sauter v. Bregenz on the Relations of Vegetation in the 

 district of the Boden lake and in a part of the Voralberg*, 

 as also the descriptions of MM. Tommasinif and Brunner J, 

 as they are more of local interest, and their numerous special 

 statements do not permit a general representation of the re- 

 sults. 



Highly important for future writers on the Vegetable Geo- 

 graphy of the South Sea Islands is M. Guillemin's Zephy- 

 ritis Taitensis : it is most especially adapted, in connexion 

 with M. Endlicher's remarks on the Flora of the South Sea 

 Islands, and the beautiful memoir of Allan Cunningham, 

 mentioned at page 153, on that of New Zealand, to a special 

 statistical research. 



M. F. A. Miquel || has published a memoir on the occur- 

 rence of the Sargazzo in the sea of Sargazzo, named after it, 

 in which there are some points intimately connected with 

 the geography of plants. M. Miquel is also convinced that 

 Agardh's two species S. vulgare and S. bacciferum are iden- 

 tical, and only form one species, for which he proposes the 

 name of S. Columbi, as this enterprising navigator touched on 

 the Sargazzo sea on the 16th Sept. 1492. According to the 

 laws in force among botanists, such a change of names can cer- 

 tainly meet with no good reception ; the plant which floats in 

 this sea was named by Linnaeus Fucus natans, and is identical 

 with Fucus natanSy Turn. ; Gmelin certainly did wrong when 

 he called it Fucus Sargazzo. The generic name has, it is true, 

 been changed, but there exists no reason for altering Lin- 



* Flora von 1837, i. Beiblatter, p. 1. 



f* Ausflug von Gbrz auf die Kron-Alpe tmd in das Reibler-Thal in Karn- 

 then. Flora von 1 837. Nos. 5, 6. 



J Ausflug ill's Zermatt-Thal im Julius, 1836. Flora von 1837. No. 10. 



Enumeration des plantes decouvertes par les voyageurs dans les Isles 

 de la Societe, principalement dans celle de Taiti. Ann. des Scienc. Nat. 

 1837, i. 



|j Over het Sargasso of Zeekroos. Tijdschrift voor Natuurlijke Geschie- 

 denis en Physiologic, 1837, iv. p. 25 41. 



