Woodland Sunflower (Helianthus divaricatus)
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- Common Sunflower
Common sunflower has a larger flower with a more prominent eye.
- Large-Flowered Leafcup
Leafcup has maple-like leaves, while woodland sunflower has lanceolate leaves.
Woodland sunflower has a narrower leaf.
- Pale-Leaved Sunflower
Leaves of woodland sunflower have very short stems (less than 1/4 inch); pale-leaved sunflower leaves have slightly longer, and the leaves have more conspicuous veins.
- Small Wood Sunflower
Small wood sunflower has a smaller blossom.
Sneezeweed has a relatively unusually shaped petal, roughly triangular with a scalloped outer edge.
- Tall Coneflower
The coneflower has a lobed leaf, while woodland sunflower has a lanceolate leaf.
- Tall Coreopsis
Tall coreopsis has a three-part divided leaf; sunflower leaf is entire.
- Thin-Leaved Sunflower
These are very difficult to tell apart. Thin-leaved sunflower has a stemless leaf, while the woodland sunflower has short-stemmed leaves.
- Whorled Rosinweed
Whorled rosinweed leaves occur in whorls of three, while woodland sunflower leaves occur in pairs.