Just starting to bloom
Spreading Dogbane growing on the hillside above the Glenmore Reservoir (Calgary, Canada)
Check- should have pink flowers; C. cannibinum is white-flowered
Red Wing, Minnesota
Still not blooming, but growing in patches on the edges of the woods where there is more sunlight
Apocynum androsaemifolium (Fly-trap dogbane, Spreading dogbane) is a flowering plant. Milky sap appears on broken stems. Leaf margin is entire and leaf veination is alternate. Its leaves appear as pointed ovals, while its flowers appear terminally on a stalk.