thickets of a poisonous plant hogweed

apiaceae background bloom blooming blossom botanical botany close common countryside cow danger dangerous day ecology flora floral flower garden giant green growing heracleum herb hogsban hogweed homeopathy invade macro mantegazzianum meadow natural nature parsley parsnip perennial plant poisonous rhubarb sap sphondylium stem sturdy summer toxic vintage weed white widespread wild