heracleum sosnowskyi on blue sky background. all parts of heracleum sosnowskyi contain the intense toxic allergen furanocoumarin

heracleum sosnowskyi toxic background allergen sky blue hogweed large giant danger poisonous flora herb beautiful dangerous nature summer green flower plant burn umbrella grass weed perennial inflorescence bloom parsnip white wild spring leaf harmful natural ecology botany season wildflower blooming poison blossom cow grooved group stems silhouette seed wildlife background parts intense furanocoumarin