The Vegetation of the Nolo. 



By 



M. Vahl. 



The Noto is a little island in the lake of Torsjo in Småland 

 (Sweden). As it is of great interest to see the evolution of the 

 vegetation in such a little uninhabited island, where it is developing 

 without interference of man , I have examined the formations of ve- 

 getation after the statistical method, proposed by Prof. Raunkiær 1 ). 



As main-divisions of the growth-forms I have adopted those 

 of the system of Raunkiær. As principle of subdivisions I have 

 used the protections of the plants against evaporation, their de- 

 foliation, their faculty to protrude their shoots through the soil. 

 After this last faculty I have divided the plants in the diageic and 

 the epigeic ones. The diageic plants have the faculty to protrude 

 their shoots through the soil. Hereto belong species with faculty of 

 subterraneous migration and besides these all geophytes. The 

 epigeic plants are such, by which no buds can protrude through 

 the soil. This division has proved to correspond better with the 

 difference between the plants of the loose and the hard soil than 

 any other division. For further information on this matter look 

 to my pamphlet: Les types biologiques dans quelques formations 

 végétales de la Scandinavie 2 ). 



The Notö has its greatest extension, 51 m, from about north 

 to south. The greatest width is 30 m. The island is formed by a 

 stone-reef, shaped as a horse-shoe, that turns its open end towards 



x ) Botanisk Tidsskrift. Bd. 30 1909. 



2 ) Bulletin de l'académie royale des sciences et des lettres de Danemark 1911. 



18* 



