218 GEOLOGICAL SURVEY OP CANADA. 



273. TOWNSENDIA, Hook. 

 (1012.) T. florifer, Gray. 



Erigeron (?) florifer, Hook. Fl. II., 20. 

 Stenotus florifer, Torr. & Gray Fl. II., 238. 



Dry rocky or gravelly soil along the Milk River and on the North 

 Branch of the North Fork of the Old Man River alt,, 5,000 feet, 

 N.W.T. (Dawson.) 



(1013.) T. sericea, Hook. Fl. II., 16. 



Aster (?) exscapus, Richards, in Frankl. Journ., 32. 



Vicinity of Fort Carlton on the Saskatchewan. (Richardson.} Rare 

 upon the dry banks of the Saskatchewan, and among the Rocky Moun- 

 tains, Lat. 54. (Drummond.) Rocky Mountains. (Bourgeau.) 



274. SERICOC ARPUS ,Nees. (WHITE-TOPPED ASTER.) 



(1014.) S. solidagineus, Nees. 



Aster solidagineus, Michx. Fl. II., 108. 

 A. solidaginoides, Pursh Fl. II., 543. 



Moist woodlands, Canada. (Torr. & Gray Fl. II., 102.) Near Mon- 

 treal. (Cleghorn in Hooker. ,) We have no other record of this species 

 and consider its occurrence within our limits very doubtful. (Macoun.) 



275. ASTER, Linn. (STAR-WORT. ASTER.) 

 (1015.) A. tanacetifolius, HBK. 



Machseranthera tanacetifolia, Nees. Hook. Bot. Mag. t. 4624. 



On arid soil along the Milk River, near the south-western boundary 

 of the prairie region, rare. (Dawson.) 



(1016.) A. canescens, Pursh. 



Machserantliera canescens, Gray. Macoun's Cat., No. 1109. 

 Dieteria canescens, Nutt. Torr. & Gray Fl. II., 101. 



On arid, argillaceous soils in the south-western part of the 

 prairie region. South of Wood Mountain, in dry clay-bottomed valleys, 

 on sub-saline soil. (Dawson.) On dry saline soil, where there is little 

 vegetation, around the Hand Hills, and along the Red Deer River to 

 the south of them. (Macoun.} 



