498 Fr. J. Mathiesen. 



the anthers, so that at any rate the dry and hght pollen, 

 when it falls out of the anthers by accidental shaking of 

 the plant, will easily be able to fall upon the almost globular 

 stigma. Self-pollination must take place with somewhat 

 more difficulty in P. euphrasioides and lapponica owing to 

 the great obliquity of the flower. The latter species, which 

 has in addition the most protrusive stigma, is no doubt 

 also the worst self-pollinator, and according to Porsild it 

 is also the poorest fruit-setting species in Greenland. 



In P. Oederi, in which the flower, as in P. flammea, 

 stands almost in a vertical position, the upper lip curves 

 forward and downward at the end of the flowering period, 

 by which means the stigma is brought in a position that 

 enables it to receive the pollen when it falls. 



Pedicularis Sceptrum carolinum, as Castilleia pallida^ no 

 doubt normally requires insect-visits for pollination. Bart- 

 schia alpina is characterized by great variation in the length 

 of its style; in the short-styled forms, especially in those 

 in which the stigma is included in the helmet, self-pollination 

 must easily be able to take place; any appreciable growth 

 of the corolla tube has not been demonstrated in the Arctic 

 regions, so the variations must be regarded as individual. 

 On the other hand, in several instances of older flowers, the 

 anthers were found to project outside the corolla so that 

 in these cases we may perhaps assume with Kerner that 

 some amount of cross-pollination takes place between older 

 and younger flowers by the agency of the wind. 



With the exception of P. capitata I found, in my material, 

 ripe fruit in connection with all the species. 



The seeds were small and light in all the species. 



