Common Milkweed Ontario. It is especially common in the manitoulin islands and the east central portions of southern ontario but it seems to be increasing in most other portions of the province as well. Common milkweed asclepias syriaca is a native herbaceous perennial whose main virtue is its appeal to butterflies especially the monarch which deposits its eggs on the milkweed when the caterpillars hatch they feed on the leaves of milkweed.
Southern ontario rare habitat four leaved milkweed can be found in moist or dry woodlands forest edges ridges. Common milkweed asclepias syriaca. A coloured province or state means this species occurs somewhere in that province state.
The entire province state is coloured regardless of where in that province state it occurs.
Common milkweed occurs throughout southern ontario in pastures meadows waste places roadsides and cultivated land. Asclepias syriaca commonly called common milkweed butterfly flower silkweed silky swallow wort and virginia silkweed is a species of flowering plant it is in the genus asclepias the milkweeds this species is native to southern canada and of much of the conterminous eastern u s east of the rocky mountains excluding the drier parts of the prairies. Common milkweed occurs throughout southern ontario in pastures meadows waste places roadsides and cultivated land. Common milkweed occurs throughout southern ontario in pastures meadows waste places roadsides and cultivated land.