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Plants of damp to wet meadows, thickets and stream banks.  Flowers August to September. Native.

Our plants are  Rudbeckia laciniata  L.  var.  laciniata .

[Cultivated forms exist and may escape to suitable habitats.]

Perennial.  Colony-forming from rhizomes.  Stems are glaucous and mostly glabrous, or sometimes sparsely pubescent upwards near branches. Typical height is 5 to 6+ feet.

Inflorescences are open, flat- or round-topped, often with numerous ascending branches.  Flower heads are few per branch, borne on long peduncles.

Flower heads are radiateRay florets are yellow, neuterDisc florets are bisexual and fertile; corollas green-yellow to yellow-brown. Receptacles are conical in shape, with short scales (chaff) subtending individual florets.  Chaff does not completely conceal corollas.

Basal leaves are typically not present at flowering.  Lower to mid-stem leaves are large, deeply lobed and/or divided, sometimes also obscurely toothed.  Upper leaves become much smaller, unlobed or obscurely lobed, and sometimes toothed.

Cypselae are black, 4-angled.  Pappus is of minute scales.

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Similar species:  Silphium perfoliatum and Heliopsis helianthoides.

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