56 B 



Canadian Arctic Expedition, 1913-18 



Figure P. 



Polemonium caendeum L. var. vUlosum (Rud.) Brand, showing the stolons, and the base of 

 an aerial shoot; two-thirds of the natural size; specimen from Herschel island. 



P. boreale Adams. 



In this species the height of the flower-bearing stem is only about 6 cm., 

 but the total length of the shoot developed from the crown of the root may 

 measure a length of up to 20 cm. Otherwise the structure of the root and the 

 ramification of the shoot agree with those of the preceding species. 



BORAGINACEAE. 



Mertensia maritima (L.) S. F. Gray. 



The primary root is fleshy, quite thick, and reaches a considerable length 

 — over 30 cm. From the crown of the root arises a large complex of shoots 

 which ramify freely, forming open rosettes and ascending, very leafy, flower- 

 bearing stems. In the specimens from Martin point, Alaska, the plant forms 

 large open cushions measuring about 20 cm. in diameter. 



Myosotis silvatica Hoffm. 



It is rather surprising to see an herb like this reaching a height of 25 

 cm. at a latitude of 69° 35' N.; the specimens were collected with flowers and 

 young fruits in the month of August. 



SCROPHULARIACEAE. 

 Castilleja pallida (L.) Kunth. 



The tallest specimens are from the south coast of Coronation gulf ; they measure 

 about 22 cm. in height. The plant is perennial but the primary root, although 

 quite thick, is not very deep owing to the profuse development of long, thick, 

 lateral roots. There is no rosette of leaves, but a cluster of shoots arises from the 



