Other early crops included cotton, sunflower, pumpkins, tobacco, goosefoot, knotgrass, and sump weed. The larvae feed on dandelion and knotgrass. The larvae feed on low growing plants such as knotgrass, dandelion and chickweed. The larvae feed on ivy, knotgrass and other low growing plants. The larvae feed on knotgrass, dandelion and dock in captivity. Typical food plants include common nettle, docks, common knotgrass, fat hen, common chickweed, and yarrow. Polygonum aviculare or common knotgrass is a plant related to buckwheat and dock. Its ingredients include fluxweed, knotgrass, lacewing flies, leeches, powdered Bicorn horn, and shredded Boomslang skin. Mountain knotgrass is an annual with a branching, somewhat woody root system. Common names include knotgrass, water finger-grass, couch paspalum, eternity grass, gingergrass, and Thompson grass. Common knotgrass is an annual herb with a semi-erect stem that may grow from high.