Black-eyed Susan is normally less than three feet tall, while tall coreposis can be as much as eight feet tall. Leaves and stem of black-eyed Susan are hairy; those of tall coreopsis are smooth.

Leafcup leaves resemble maple leaves; coreopsis leaves are divided.

Tall coreopsis has a three-part divided leaf; sunflower leaf is entire.

Central disc of the coreopsis is flat and very dark in color.

Sneezeweed has a relatively unusually shaped petal, roughly triangular with a scalloped outer edge. Tall coreopsis has a brown eye; sneezeweed has a yellow center.

Eye of tall coreopsis is brown; eye of tall coneflower is yellow to green. Coreposis leaf is divided; coneflower leaf is lobed.

Tall coreopsis is generally much taller than the coneflower. The coreopsis has a three-part divided leaf, while the coneflower has a simple toothed leaf.

Tall coreopsis has a three-part divided leaf; sunflower leaf is entire.

Rosinweed leaves occur in whorls of three; coreopsis leaves are divided and occur in pairs.

Tall coreopsis has a three-part divided leaf; sunflower leaf is entire.