472 



arrangement it gains a possibility of reaching above the Sphag- 

 num in the following year. That the phenomenon is not, 

 as I at first supposed, caused by the influence of chmatic 

 factors on the plant, will be evident by the fact that it has 

 only been observed in a very few specimens in all the collec- 

 tions from different places in Scandinavia, and to draw a 

 geographical line between the two types, as 1 have tried to 

 do from the mentioned supposition, and as I have done with 

 F. vulgaris, is quite impossible here. 



These specimens I can only regard as those which are 

 unfitted for the struggle for existence, and this agrees very 

 well with the fact that they are found mingled with the others, 

 both in arctic and temperate regions. 



Diagram of the manner of growth of P. villosa. 

 Flower Flower 



Winter-bud 



Spring-rosette 



Elongated internodes 



I. P. villosa. normal 

 manner of growth. 



Winter-bud 

 Elongated internodes 



Elongated internodes 



II. P. villosa^ constantly over- 

 grown by the Sphagnum. 



The leaves are very concave, often the edges are bent so 

 closely together that the leaf is formed like a channel (Fig. 9, A). 

 — As to vegetative propagation, I have, in spite of the rich 

 material at my disposal, only observed it a very few times ; 

 from the lower parts of the rhizome, probably from the spring- 

 rosette of the preceding year, a few shoots with elongated 

 internodes had developed. But, as a whole, vegetative propa- 

 gation is very scanty. Concerning the number of flowers, I 



