Primulaceae. 



191 



5 cm long and 7 — 10 mm broad. The inflorescences vary up 

 to 10 flowers. 



In the monograph by Pax and Knuth, Pr. nivalis var. 

 pumila Ledeb. is considered to be identical with Kjellman's 

 species Pr.Tschiiktschorum (1882, p. 516, t. IX), and the name 

 Pr. pumila (Ledeb.) Pax, is consequently given to both. The 

 description although it agrees closely with Pr. T. Kjell- 

 man, scarcely applies to Pr. nivalis f. pumila Ledeb. ac- 

 cording to the material at my disposal here. This latter 

 differs distinctly from 

 the former in having 

 broader leaves, and a 

 longer corolla tube in 

 proportion to the calyx. 

 It also has, all over, 

 a more vigorous habit, 

 and the inflorescence 

 is generally fuller. The 

 two forms have the 

 same area of distri- 

 bution viz. north- 

 eastern Siberia and the 

 islands in the Behring 

 Strait. 



Kjellman gives (1883, p. 492, figg. pp. 490 and 491) the 

 following description of the hibernation bud of Pr. nivalis 

 from Chuckesland: "Det är, såsom synes, en mycket 

 kraftig bildning. Dess längd är 35, dess tvärdiameter 15 mm. 

 Dess hölja utgöras af ett antal kraftiga, tjocka lågblad, 

 hvilka antaghgen i viss mån bidraga till de inre delarnas 

 skydd, men som derhjämta, och kanske huvudsakligen, tjenst- 

 göra såsom förvaringsrum for upplagsnäring. Åtminstone 

 äro deras parenchymcellar öfverfulla of stärkeise. Innanför 

 dessa sitta knoppskottets assimileranda blad, — de äro stora 



A В 



Fig. 12. Primula nivalis var. pumila. 



л, longitudinal section of a flower; the stigma is 

 level with the base of the anthers, (^/j)- B, longitud- 

 inal section of a short-styled flower, (Vi)- (Pitlekaj.) 



