465 



bulbs are formed like the winter-biid, consisting of small, thick 

 scale-leaves, characterized by a strong brown colour, probably 

 due to their contents of tannin. Whether this kind of vege- 

 tative propagation is found at all in the arctic type of P. vul- 

 garis, which never develops an autumn-rosette, I cannot say, 

 I never observed anything in that direction, but probably this 

 work is undertaken by the spring-rosette, in which case vege- 

 tative propagation is, however, very scanty. I have been led 

 to this conclusion mainly by a parallel circumstance in P. 

 villosa, which will be mentioned later on. It is possible, that 

 this limitation of the vegetable propagation is balanced by the 

 more regular dispersal of the seeds in the arctic species, 

 but in order to be able to judge correctly on this point one 

 must, however, also take note of the number of the seeds and 

 their power of germination, which, for the time being, I have 

 not been able to do. 



Concerning the quantity of the flowers a statistic synopsis 

 shows a difference between temperate and arctic types. In the 

 former 3 — 4, and eveji 10 flowers are very commonly found 

 on the same plant, while ordinarily only one flower occurs on 

 the latter. In a single case 1 have observed traces of develop- 

 ment of an inflorescense, the same, as will be mentioned in 

 the following, has been observed in P. villosa (Fig. 16) and 

 can perhaps give a hint regarding the true explanation of the 

 inflorescense in the genus Pinguicula, a question which has 

 however no interest in a communication regarding the special 

 nature of the arctic plants. I only refer the reader to Cuchenac's 

 and Wydler's somewhat dubious explanations on this point. 



With respect to the temperate type the biology of the 

 flower has been investigated by many inquirers, the arctic 

 one has been studied in the best and most detailed manner 

 by Warming. My investigations can only confirm and, on a 

 single point, supply Warming's results. As is well known, 



