milkweed flower clusters in open in pollinator field

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