common milkweed asclepias syriaca, plant and leaves, edible plant, habitat

apocynaceae asclepias syriaca biodiversity canada europe poland pychowice biology blooming botany bud butterfly flower common milkweed cyme ecology flora green habitat inflorescence invasive latex nature perennial plant plants rhizomes silkweed species spread summer sunny toxic treat umbelate vegetation xerothermic turf leaves genus dogbane family high resolution botanical rarity cultivar variety hybrid endemic natural silky swallow-wort native southern host wandering monarch caterpillars edible full frame