— 230 - 



I may also add, that I have not found Salicornia amhigua 

 growing directly close to the sea; this we could not expect where 

 the mangrove-vegetation is present, but in the western corner of 

 Krausse's lagoon sheltered muddy shores were found without any 

 mangrove whatever and where Salicornia was also absent; it only 

 occurred inside the lagoon. Thus Salicornia is of no importance 

 in the Danish West Indies with regard to the increase of land. 



3. The Conocarpus formation. 



(Clfr. B0rgesen, 1898, p. 49—51 ; 1900, p. 45-47.) 

 In my earlier paper I have, though with some reservation, re- 

 ferred Conocarpus erecta L. and Anona palustris L. to the man- 

 grove vegetation. But as I have already stated in mentioning this 

 formation, it seems to me, according to my renewed examinations, 

 more natural to refer these species, together with others, to their 

 own formation, and Docent Raunkiser, with whom I worked 

 out the question during our visit to Krause's lagoon in January 

 1906, also agreed with me. This formation can then be called 

 the Conocarpus formation after the species commonly occurring in 

 the Danish West Indies. 



With this classification we agree better with Schimper's 

 division of the Indo-Malayan strand flora, as this formation, in 

 any case partly, corresponds with Schimper's Nipa formation, 

 but only partly, for, as Schimper himself says, the Nipa 

 formation is an "Uebergangs- und Mischformation" composed of 

 species which make very different demands on the surrounding 

 conditions of nature, as some of the species referred here are able 

 to grow on very humid, even water-covered substratum, e. g. Nipa 

 fruticans Wurmb. and others on quite dry soil; evidently this 

 formation of Schimper does not form a natural whole. The Nipa 

 growth itself, which has given the name to the formation, is most 

 correctly, it seems to me, to be considered as a river and swamp 

 vegetation, consequently a freshwater vegetation, and Jobs. Schmidt 

 also emphasizes this as being his opinion (1. c. p. 6). Schimper, 

 however, mentions some species growing on drier soil related to 

 the same vegetation, and most likely it is next to these that 

 the West Indian vegetation corresponds. As corresponding with 

 the Nipa formation Schimper also locates to Brazil Conocarpus 

 erecta L. and Anona palustris L. among other species. Of course 

 it would be most natural to separate this vegetation occurring on 



