100 GEOLOGICAL SURVEY OF CANADA. 



126. NECUNDO, Mcench. (ASH-LEAVED MAPLE.) 



(422.) N. aceroides, Mcench. Box-Elder. 



Acer Negundo, Linn. Pnrsh, 268. 



Negundo frajcinifolium, Nutt. Hook. Fl. I., 114. 



A few trees of this species are found near Toronto, in the valley of 

 the Humber, about two miles from its mouth. Eleven miles up the 

 ivumuiistiquia, west of Lake Superior. On an island in the Lake of 

 the Woods. Abundant in all the valleys of the tributaries of the Bed 

 River and of the Saskatchewan, coming from the south ; also abundant 

 on the streams flowing into Lake Winnipegosis. It grows very rapidly 

 when planted in any part of Ontario. This is the "sugar maple" of 

 Manitoba and the North-west, and is destined to be the shade tree of all 

 the prairie cities. 



XXX. ANACARDIACE^]. SUMACH FAMILY. 



127. RHUS, Linn. (SUMACH.) 



(423.) R. typhina, Linn. Stag-horn Sumach. 

 R. viridiflora, DC. Prod. II., 67. 



On dry, rocky, or gravelly knolls, or along river margins, or in fence 

 corners. Common in suitable localities, from Nova Scotia to the west 

 coast of Lake Huron. 



(424.) R. glabra, Linn. Smooth Sumach. 



Canada, and as far north as the Saskatchewan. (?) (Richardson.') 

 Chain Lakes, N.S. (Sommers.) Yicin ity of London, Ont. (Saunders.) 

 Very abundant on dry, rocky ground, along the Rivers Moira and 

 Trent ; also, at Queenston Heights and around Amherstburg, Ont. ; 

 Lake Nemikin, Dawson Route, west of Lake Superior. (Macoun.) 

 Yery likely overlooked in many parts of the country. 



(425.) R. copallina, Linn. Dwarf Sumach. 



Rocky places ; very rare in Canada. Thousand Islands, River St. 

 Lawrence. (Rev. J. K. McMorine.) 



(426.) R. venenata, DC. Poison Sumach. 



Occasional in swamps in western Ontario ; Westminster Ponds, Lon- 

 don, Ont. (Burgess.) Swamps near Weston, Ont. (Tyrrell.} 



