heracleum sosnovskyi big poison plant blooming. medicinal plant common hogweed heracleum sphondylium

allergen background beautiful bloom blooming blossom botanic botany cartwheelflower danger dangerous ecology environment flora flower garden giant green harmful heracleum herb herbal hogweed homeopathy invasive large leaf macro meadow natural nature park parsnip phototoxic plant poison poisonous season species spring summer toxic umbrella white wide wild wildflower wildflowers