|wild parsnip (Pastinaca sativa)||
wild parsnip (Pastinaca sativa; PARSLEY FAMILY [Apiaceae]) Tall (to 5') biennial with an allegedly edible taproot (tastes differ). Flowers small, yellow, and aggregated into a 4-8" wide umbel. Flowers in summer and early fall. Leaves alternate, compound, with leaflets serrate, lobed, or even compound again. Contact with juices from this plant in the presence of sunlight can cause a long-lasting rash, blistering, and skin discoloration. An invasive Eurasian native that has become well established as a weed in sunny fields, roadsides, and waste places. 
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