632 Floristik, Geographie, Systematik etc. 



bien distincte de C. umbilicus, Filago neglecta DC, Echiuni Broteri 

 Sampaio {E. italicuin Brot, non L.), Gratiola ojficinalis var. latifoUa 

 Humbert, Veronica micrantha Hoff, et Link, Calamintha Nepeta 

 Link et Hoff. var. laxißora Reynier, Teucrium salviastriirn Schreb., 

 Typha Laxmanni Lepech. J. Offner. 



Börgesen, F., Notes on the shore Vegetation of the danish 

 West Indian islands (Bot. Tidsskr. 29. Copenhagen 1909. 

 59 pp. 4 pl. and 40 figs in the text.) 



A description accompanied by excellent photos of the different 

 plant-formations to be met with along the shores of the named 

 islands. The author distinguishes the following plant-formations: 



1. The seagrass (and algae) formation, consisting of Cytnodocea, 

 Halodule, Thalassia and Halophila together with many algae. This 

 formation grows down to a depth of 5 — 6 fathoms probably deeper, 

 whereas the algae formation on soft or sandy bottom extends to a 

 far greater depth. 



2. The Mangrove Formation, present everywhere on sheltered 

 coast and consisting of the three species Rhisophora Mangle j Avicennia 

 nitida, and Laguncularia vaceniosa. It is described how changes 

 take place when the lagoons are formed and later closed, also the 

 effect of a hurricane is described in detail. — Some Singular aerial 

 roots were found descending from the main stem and from the 

 underside of the branches of Avicennia. They were much branced, 

 foot long and in anatomical structure resembling the vertically 

 growing pneumatophores. 



3. The Salicornia formation, closely connected with the Man- 

 grove formation and growing along with the innermost part of this, 

 the Laguncularia association. The Salicornia formation is only found 

 where the Mangroves are absent or where they are growing scat- 

 tered. Salicornia amhigua, Balis rnarilinia and Sesuvium portidac- 

 castruin, are the most common species. 



4. The Conocarpus formation, growing almost always upon old 

 lagoon subStratum and therefore often found behind the Mangrove 

 formation. Conocarpns erecla, Anona palustris, and Bitcida Buceras 

 are the most characteristic plants. 



The plant-formations on sandy soil are three: 



5. The pes-caprae formation, consisting mainly of herbaceous 

 creeping plants such as Ipomaea pes caprae, Canavalia ohtnsifolia, 

 and others. This formation grows nearest the sea. 



6. The Tournefortia formation inside No 5, consisting of shrubs, 

 of which Toiirnejortia gnaphalodes is the most common. 



7. The Coccoloba Manchineel formation is the innermost, the 

 most common species are Coccoloba uvifera and Hippomane Mancinella. 



Lastly, the rocky coast Vegetation is described. Ove Paulsen. 



Diagaoses plantapum Africae. Plantes nouvelles de l'Afrique 

 tropicale frangaise decrites d' apres les collections de 

 M. Auguste Chevalier. (Journ. de Bot. 2e Serie. II. p. 19-25. 

 1909. A suivre.) 



Ce travail fait suite aux Novitates florae africanae publies 

 dans le Bulletin de la Societe botanique de France (Memoire 

 8, 1907 et 1908) et analyses ici (T. 108, p. 233 et 555). Les Filicinees 

 y sont traitees par H. Christ, les Malpighiacees par Sprague. 



