Asteraceae. Forb. Leaves alternate. Leaves are feathery with many divisions. Flowerhead is a cluster of small white flowers. Tiny plants are very hairy in comparison to the adult. No similar species found frequently in experiment.
Ranunculaceae. Forb. Leaves whorled. There are usually three leaves, and each leaf is divided into three main sections. Each section is lobed and the lobes come to a sharp point. Inflorescence is on a single long stalk and tight and cylinder-shaped. Flowers are white. Seeds are cottony. Similar species: Viola pedatifida. Viola petadifida is deeply lobed with rounded tips, does not have three distinct leaves, and is not whorled.
Asclepiadaceae. Forb. Leaves alternate. Leaves are narrow and are often wider at their bases than at the tip, but sometimes they taper to the stem. The stem is hairy. Flowerhead is a cluster of bright orage flowers. Similar species: Erigeroncanadensis.Erigeron canadensishas flimsier leaves that are coursely toothed while A. tuberosa has stiffer smooth leaves.
Asteraceae. Forb. Leaves alternate. Basal and rosette leaves are large and oval with a long, stiff petiole and rounded serrations. Stalk leaves are oval, tapered at both ends and have a short petiole or are sessile. All leaves have dense, soft pubescence. Flowerhead is a cluster of yellow flowers at top of stalk. Similar species Aster azureus–Aster azureus leaves are spade-shaped, rougher and have no rounded serrations.