Poisonous Weed Look-Alike: Wild Parsnip vs. Queen Anne's Lace

From your description, you likely mean wild parsnip (Pastinaca sativa), a biennial from Europe/Asia naturalized in the US, common in abandoned fields, roadsides, and disturbed areas. White/yellow umbel flowers bloom May–October, producing many seeds. It causes burn-like reactions (phytophotodermatitis) when sap contacts skin and is exposed to sunlight—especially bad when weed-whacked as plant bits fly. The chemicals are psoralens. Wild parsnip is related to edible parsnip.

If widespread, cover up thoroughly, mow down, then apply herbicide like Roundup. For non-chemical control, smother with black plastic for a season during hot weather. Clean all equipment afterward with rubber gloves.