Scrophiilariaceae. 413 



differs in older and younger flowers, so that the style of the 

 younger flower protrudes farther than that of the older, the 

 corolla-tube of the latter having increased in length. The 

 elongation may be as much as 5 mm and bring the anthers 

 — the filaments follow the corolla in growth — into contact 

 with the stigma, so that self-pollination takes place. War- 

 MiNG (1890, p. 226) admits that such a growth can take place, 

 and disturb the relations of the organs in question, but main- 

 tains that individual differences also occur in the relative 

 length of the style and the corolla. I found the same forms 

 that have been illustrated by Warming (1886) in his Fig. 

 3, A~F, K and L (reproduced in this paper as Fig. 16), 

 and even if there might possibly occur some difference in 

 the length of the corolla of older and of younger flowers of 

 the same inflorescence, yet I never found the style pro- 

 truded far in the young flowers and enclosed in the older 

 ones; that, at any rate under more northerly latitudes, it is 

 really a matter of individual differences, is supported by a 

 statement of Mr. Nyhuus of Tromso, who in a letter to 

 E. Warming in 1885 writes: "On Aug. 24th I found BaHsia 

 there (i. e. Dalfjæld in Marknæsdalen) in abundance (towards 

 the south) from a height of 2500 feet and down over the 

 whole mountain; but from about 2500 to 1500 feet I did 

 not fmd a single flower with protruding style although I can 

 truthfully say that I examined several hundred piants. On 

 the other hånd, lower than that, long-styled flowers became 

 constantly more frequent" (E. Warming, 1886, p. 10). 



I found the fruit-setting to be good and abundant every- 

 where. ""Die gefliigelten Samen werden durch den Wind ver- 

 breitet." (Schroter). 



Geographical distribution in the Arctics according 

 to Lange and Porsild: Labrador, Arctic Russia and Siberia, 

 (according to F. R. Kjellman's lists of the flora, in Siberia 

 XXXVII. 27 



