477 



This appears to be near P. vulgaris, but the corolla is of 

 different shape and hairy within, while the spur is longer." 



I cannot conclude my report on the morphology and 

 biology of the two types of Pinguicula mentioned in this paper, 

 without taking a stand as regards P. arctica A. Eastwood. 

 It appears to me that the eagerness for finding new species, 

 which is growing so rapidly in our days, may without injury 

 to the future development of Botany be restricted considerably 



— at any rate we may be justified in demanding that it shall 

 be kept within the limits of common sense. The features, in 

 which P. arctica is said to distinguish itself from P. vulgaris^ 

 namely the shape and hairiness of the corolla and the length 

 of the spur, are so uncertain and variable, that no careful in- 

 vestigator ventures to use these as a basis for the creation of 

 a new species. The above-mentioned author does not know 

 any of the features, which 1 have found peculiar to the arctic 

 specimens of P. vulgaris^ and in which they agree with the 

 purely arctic species, P. villosa. I cannot believe that it will 

 be possible to disregard these features totally, when a new 

 arctic species of Pinguicula is to be created. Although "P. 

 arctica" is our ultimate object, this has not yet been attained 



— either bv Alice Eastwood or bv any other investigator. 



TL Physiology. 



LiNNÆcs, p. 10. Withering, p. 18. Darwin, p. 279. Morren, 

 1876 a; 1876 b. Pfeffer. Tischctkin, 1889, p. 346; 1891, p. 33. 

 GoEBEL^ p. 181. Fenner. 



At first, as is well known, the genus Pinguicula was placed 

 by Ch. Darwin in 1875 among the so-called insectivorous plants. 

 Already long before this time the mucilagenous secretum of the 

 leaves had been observed; further, it was known, that the 

 secretum was able to cause the coagulation in milk (Linné, 



