Usually found in rosette form. Leaves are long with very deep teeth, after the plant has gotten large. Leaves are flimsy. When rosettes are small the teeth are generally smaller and not so deeply lobed but generally not possible to distinguish the Lactuca sp. Flowering stalk branches many times and there is one flower per a stalk.
Flowers are small and yellow, and look like dandelions.
Has a tan sap when a leaf vein is broken.