DES MOINES, Iowa (AP) — Iowans are being warned to watch out for those plants on the side of the road with lacy yellow flowers. Des Moines television station KCCI reports that large patches of wild parsnip are growing now across the state. Also known as poison parsnip, the plant looks like a dill plant or Queen Anne’s lace. It is yellow and grows about four feet tall.

The plant is native to Eurasia and related to the carrot family. It has a sap that contains chemicals that can cause rashes, blisters, burning and itching when exposed to sunlight. The rash can hurt for weeks and scars may remain for many years.