common milkweed flowers open in a summer pollinator field

asclepiadaceae asclepias butterfly cardiac cayugalake cluster compounds detail eco ecosystem environment field fingerlakes florets flower flowers food foodchain glycoside green habitat heat horticulture iloveny insects ithaca ithacaisgorges lakeshore lansing larvae leaves lifecycle milkweed monarch nature newyorkstate open pink plants pollination pollinator saltpointnature summer toxic