450 



slriu-liire of llie arctic species and l'oiind llial it ajrreed with 

 IkcnKNAü's description. The rcsidl ol' my iiivesli^Mlions, liow- 

 ever, does nol show this. According to lirciiENAr tlie shoot- 

 slrncUire is the following: The plant, on reaching the light, 

 develo|)s its first rosette, the so-called "spring- roselle" which 

 terminates in a llower: thus the main axis ends its growth, 

 lînt at the lime of llowering a rejuvenating shoot is seen in 

 the axil of the nppermost foliage-leaf; this shoot develops into 

 the second rosette "the anlnmn-rosette." \Yhilc developing, it 

 forces the frnit- stalk somewhat to one side, and often before 

 tlie frnit is ripe, the stalk is flaccid and almost rotten. Simnl- 

 taneonsly, the spring- rosette and its roots usnally decay, and 

 tiie antnmn-roselte is now nonrished exclnsively by its adven- 

 titions roots. Towards the winter the leaves of the antumn- 

 rosette decay entirely, and in the middle of the latter is now 

 fonnd the fully developed hibernacle which next year develops 

 into a new spring-rosette. In the case of the plant not flowering, 

 both spring and autumn rosettes belong to the same axis. ^ 



The description given here suits the shoot-structure of 

 the "temperate" specimens of P. vulgaris^ and in my material 

 I have found the same to be the case in two specimens from 

 Norway and the Færoes. That the same early decay of the 

 fruit-stalk is found also in these plants I conclude from a 

 peculiarity concerning the germination. I have received seedlings 

 from Romsdalen (Norway) and the Færoes (Fig. 1, ^), and 



' Wlielher Buciikxai is rigtit in regarding tlie shoot-structure in Fin- 

 giiicula vulgar in as sympodia! I cannot decide at the present time. Pro- 

 fessor C. Raunkiær has directed my altenlion towards the fact, that 

 Irmisch regards the said shoot-structure as monopodia!. This point 

 naturally being of great interest I intend to investigate it more closely 

 in the future, but in ecological respect and as regards my observations 

 on temperate and arctic types of P. vuh/aris the question has not any 

 real importance, as will also be evident from the following repre- 

 sentation. Whelher the shoot-structure of P. vulyuris is sympodial or 

 monopodia!, the distinction between temperate and arctic types in the 

 genus Pinguicula must be made neverthetess. 



