278 GEOLOGICAL SURVEY OF CANADA. 



Var. parviflorum, Gray. 



T. parviflorum, Nutt Torr. & Gray Fl. II., 490. 

 T. glaucum, p. Hook. Fl. I., 300. 



Involucre glabrous. Leaves lanceolate linear, generally entire, 

 sometimes slightly hairy, near the base. Vicinity of Port Ellice and 

 west of the Touchwood Hills. (Macoun.) Belly Eiver near Port 

 McLeod and Possil Conine, Milk Eiver Eidge. (^Dawson.) Along the 

 Saskatchewan. {Drummond.) 



Var. dasycephalum, Torr. & Gray. 



T. glaucum, var. u.. Hook. Fl. I., 300. 



Ammogeton scorzonercefoKum, Schrad. DC. Prodr. VII., 98. 



On dry prairies^from Lat. 49° northward to the Arctic Coast. Sas- 

 katchewan and prairies ,of the Eocky Mountains to the Arctic Coast. 

 (^Richardson.) Abundant around Morley, Bow Eiver, and eastward to 

 he Cypress Hills. • {Macoun.) South Kootanie Pass, and common in 

 the mountains and Foot Hills from Lat. 49° to Bow Eiver ; also on the 

 Chilcoten Eiver, B.C. (Dawson.) "SYest of McLeod's Lake, Lat. 55°, 

 B.C. (Macoun.) 



Vai-. taraxacifolium, Gray. 



This variety seems to be intermediate between the other two forms, 

 as it has laciniate leaves and a pubescent involucre. On dry gravelly 

 soil close to Port Ellice, Man. (Macoun.) 



(1302.) T. aurantiacum, Hook. 



Macrorhynclius troximoides, Torr. & Gray Fl. II., 491. Macoun's Cat., 

 No. n02. 



Alpine prairies of the Eocky Mountains. (Drummond.) 



(1303.) T. humile, Gray. 



Specimens approaching this species were gathered at Victoria in 

 May, 1875, but referred to T. heterophyllus, Xutt. They are identical 

 with Hall's, No. 317, from Oregon, but quite distinct from T. Ohilense 

 No. 143, of Suksdorf, which is now considered a sjmonym of the former. 



(1304.) T. laciniatum, Gray. 



Macrorhynchus la<Aniatus, Torr. & Gray, Fl. II., 492. 



On diy gravelly soil near Victoria, Vancouver Island. (Macoun & 

 Fletcher.) Small specimen from Vancouver Island collected by Lyall. 

 (Gray.) 



