sosnovsky's hogweed. dry stems of an umbrella plant against the blue sky

hogweed dangerous plant toxic umbrella allergen photosensitivity juice furanocoumarin blue sky beauty weed sosnovsky nature heracleum forest white dried flowers summer season large natural field floral flower green botany sunlight apiaceae stem perennial wildlife poisonous danger sosnowskyi color leaf invasive sosnowski cow parsnip petal bush blossom giant harmful sosnovsky's hogweed dry stems against sky horizontal photo