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Perennials. 
Colony-forming from rhizomes.  Stems glabrous and frequently glaucous below the inflorescence; often becoming pubescent above.  Typical height 4 to 6 feet.

Overall inflorescences open, with several ascending branches.  Flower heads few per branch, borne on long peduncles at tips of branches.

Flower heads radiateRay florets 8-12, yellow, neuterDisc florets bisexual and fertile, corollas yellow.  Receptacles flat to slightly convex.  Involucral bracts green, long and slender (usually extending well past the circumference of the disc), the  outer surfaces not gland-dotted.

Basal leaves are absent at flowering.  Leaves mostly opposite (the uppermost sometimes alternate), gradually or abruptly tapering to petioles (up to 5 cm in lower leaves), with 3 prominent main veins, and lower surfaces that are sparsely gland-dotted.

Plants of damp woods and clearings, stream banks, damp thickets.  Flowers August to September.  Native.

Similar species:  Helianthus divaricatus, Heliopsis helianthoides.

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