475 



т- ir 1 



Fig. 16. Pinguicida villosa. 



Two specimens \vith an indication of inflorescence. Luleå Lappmark, Quick- 

 jock, Snjäirak, July. About ^A natural size. (H. E. P. phot.) 



the same. Self-pollination seems thus to be a normal arrange- 

 ment in P. villosa. 



The hairs in the inner parts of the flower are as regards 

 shape like those in the two other species, but as regards dis- 

 tribution and number they seem to be a little more scanty. 

 As the figures show, deformations in the inflorescence as well 

 as in the flower are found in this species (Fig. 15 — 16). 



Summary. Finally in order to sum up in a few words 

 the characters — both morphological and biological — which 

 distinguish the arctic type of Pinguicida from the temperate 

 one, the scheme should be as follows: 



1. Reduction of the rejuvenating shoot. 



2. Limitation of vegetative propagation. 



3. Narrower and shorter leaves. 



4. A smaller number of flowers. 



31* 



