A genus of herbaceous plants of the Poppy family Annuals, biennials and perennials, usually with a developed stem, less often stemless. Plants produce milky sap that is white, yellow or orange. The leaves are usually once or twice or three times pinnately dissected, glabrous or more often hairy-bristly. This plant is useful. How to get rid of: If your weeds regrow, then you have a persistent root that you need to dig out. Use a spade or digging fork to dig up persistent weeds by the roots. Remove as many root pieces as you can. While weeding, hold the trowel vertically (like a child holding a crayon) to eliminate strain on your wrist.