CATALOGUE OF CANADIAN PLANTS. 157 



(724.) M. nuda, Linn. 



M. reniformis, Lam. Pursh, 314. 

 M. cordifolia, Lam. Pursh, 314. 



Very common in cool, damp woods or swamps, from Labrador, New- 

 foundland and Nova Scotia to the Pacific and northward to the Arctic 

 Sea. One of our most widely distributed species. 



Var. 0. Torr. & Gray, Fl. I., 586. 

 M. prostmta, Michx. Fl. I., 270. 



This form is easily known by the long runners producing terminal 

 racemes. 



(725.) M. pentandra, Hook. 



Frequent in mountain woods, from Lat. 49 northward. Moist alpine 

 woods in the Eocky Mountains. (Drummond.) Eastern base of the 

 Cascade Mountains on Skagit Eiver, B.C. On the slopes of the Eocky 

 Mountains, Kootanie Pass, Lat. 49. (Dawson.) In woods near Mc- 

 Leod's Lake, B.C. (Macoun.) 



(726.) M. triflda, Graham. 



Alpine rivulets, north of Smoky Eiver, on the east side of the Eocky 

 Mountains, in Lat. 56, rare. (Drummond.) On the slopes of the 

 mountains, near their summits, at Spence's Bridge, B.C. (Macoun.) 



(727.) M. caulescens, Nutt. 

 Occurs on the southern boundary of British Columbia. 



182. HEUCHERA, Linn. (ALUM-ROOT.) 



(728.) H. micrantha, Dougl. 



North-west coast of America. (Scouler.) Common around Victoria, 

 Vancouver Island. (Macoun.) East of Hope Mountain, Cascade Eange ; 

 Coast Eange, near Bute Inlet ; Queen Charlotte Islands. (Dawson.) 



(729.) H. glabra, Willd. 



North-west coast of America, also Nootka. (Hooker.) Eocky Moun- 

 tains, at Providence and Portage Eivers, in Lat. 54. (Drummond.) 

 On the Misinchinca Eiver, near the Pine Pass, Lat. 55. (Dawson.) 

 Sitka. (Eothr. Alask.) 



