42 SYLVAN ONTARIO. 



21d. Acer dasycarpnm, (Ehr.). Silver Maple. Soft White Maple. 



A large tree with white wood, growing especially on rich flats along 

 lakes or rivers. The seed, like that of the next species, is ripened in 

 time to be distributed by the floods of early summer, and the seedlings 

 are firmly established before autumn. On account of its rapid growth 

 the Silver Maple is very largely planted for shade and ornament. 



21e. Acer rubntin (L.). Soft Red Maple. Swamp Maple. 



In some forms the leaves of this species closely approach the last 

 mentioned, but usually they are less deeply lobed and more sharply 

 serrate or 2-serrate. This tree is less attached to the shores, and its 

 bright red foliage adds much to the splendor of our autumn woods. 



22a. Staphylea trifolia (L.). Bladder-nut. 



Reported as frequent from the Ottawa to the Georgian Bay, but I have 

 not met with it in Muskoka. Easily traced by the compound leaves of 

 three leaflets and the striped branches. 



23a. Ehfis typhina (L.). Staghorn Sumac. 



Common everywhere in poor soil. Known by its coarse twigs, covered 

 like the petioles with thick downy hairs, and by the masses of scarlet 

 fruit, sometimes used for dyeing. The bark has been employed 

 successfully for tanning leather. 



23b. EMs glabra (L.). Smooth Sumac. 



Very much like the last, but with twigs and petioles nearly smooth and 

 leaflets glaucous beneath. Not so common, but probably found 

 throughout the Province. 



23c. Ehtis copalllna (L.) Dwarf Sumac. 



A southern form, rare in Ontario. The bark is largely used for 

 tanning in the Southern States. 



23d. Ehfis venendta (DC.). Poison Sumac. Poison Elder. 



More poisonous than the next, but fortunately much less common, 

 being confined to swamps in the south-western peninsula. 



23e. EMs toxicodendron (L.). Poison Ivy. 



Found throughout the Province, but in two very different forms. In 

 the north and east it is a straggling shrub ; in the south-west a vigorous 

 climber. Both varieties are poisonous to many persons, especially 

 when the leaves are wet, and cause painful blisters where they have 

 affected the skin. Known by the three usually drooping leaflets 

 mounted on a long petiole. 



23f Ehtis Canaddnkis (Marsh). Aromatic Sumac. 



A straggling shrub, growing in patches in rocky woods. The aromatic 

 leaves resemble those of its relative, the Poison Ivy, but this plant is 

 quite harmless. It is common in the grounds of the National 

 Sanitarium on Lake Muskoka. 



