Tall Coneflower (Rudbeckia laciniata)
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Leaves of cup-plant join around the stem, forming a distinctive 'cup.'
- Large-Flowered Leafcup
Tall coneflower has a deeply lobed leaf, while leafcup has a maple-like leaf.
- Pale-Leaved Sunflower
Pale-leaved sunflower leaves are lanceolate; tall coneflower leaves are deeply lobed.
- Prairie Coneflower
Rays of prairie coneflower are extremely reflexed. Leaves of prairie coneflower are more finely divided.
Sneezeweed has a relatively unusually shaped petal, roughly triangular with a scalloped outer edge. Tall coneflower leaves are lobed; sneezeweed leaves are elongate.
- Tall Coreopsis
Eye of tall coreopsis is brown; eye of tall coneflower is yellow to green. Coreposis leaf is divided; coneflower leaf is lobed.
- Thin-Leaved Sunflower
Leaf of the thin-leaved sunflower is lanceolate, while that of tall coneflower is lobed.
- Whorled Rosinweed
Tall coneflower has a higher, more spherical eye. Rosinweed leaves occur in whorls of three.
- Woodland Sunflower
The coneflower has a lobed leaf, while woodland sunflower has a lanceolate leaf.