Contributions to Canadian Botany. 11 



Note. — These descriptions of tlie several forms of Sugar 

 Maples have been reprinted from Dr. Trelease's Monograph 

 in 5tii Annual Eeport of Missouri Botanical Garden, and 

 space is given to them as they change very materially our 

 knowledge of these trees, and by printing the descriptions 

 in full it is hopeil that Canadian botanists will be led to 

 carefully observe the sugar maples in their vicinity. 



Rhus glabra, Linn. 



B. glabra, L., var. occidentalis, Torrey; Macoun, Cat. 

 Can. Plants, Vol. I., p. 505. 



Deer Park, Lower Arrow Lake, B.C. ; Kamloops, B.C., 

 and Spence's Bridge, B.C. (John Macoun.) Only refer- 

 ences west of Ontario. 



Rhus copallina, Linn. 



Rocky hillsides at Lansdowne, Ont. (Bev. Chas. Young.) 

 Very rare in Canada. 



Lupixus arcticus, Wats. 



Additional stations for this species are Upper Liard 

 River, Lat. 60°, Yukon District ; forks of Stikine River, 

 B.C. {Dr. G. M. Dawson.) Fifty miles below Lower 

 Ramparts, ^Mackenzie Ri^'er. {B. S. McConnel.) Fort 

 Good Hope, Mackenzie River. {Miss E. Taylor.) Speci- 

 mens collected at Medicine Hat in flower. May 31st, 1894, 

 have been referred here by Dr. Robinson. {John Macoun, 

 Herb. Xo. 4190.) 



Saxifraga Tolm.ei, Torr. & Gray. 



On Mount Head, alt. 4,200 ft., Lat. 56° 05', Long. 

 131° 09', 1894. {Otto Klotz and H. W. E. Canamn, Herb. 

 No. 4197.) First authentic record for Canada. 



TlLL^A SIMPLEX, NUTT. 



In mud in a mill pond at Mount Stewart, Prince Edward 

 Lsland, 1888. {John Macoun.) New to Canada. 



