Thesaurus: rudbeckia

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Definitions

1. A genus of composite plants, the coneflowers, consisting of perennial herbs with showy pedunculate heads, having a hemispherical involucre, sterile ray flowers, and a conical chaffy receptacle. There are about thirty species, exclusively North American. Rudbeckia hirta, the black-eyed Susan, is a common weed in meadows.
2. A genus of composite plants, the coneflowers, consisting ofperennial herbs with showy pedunculate heads, having a hemisphericalinvolucre, sterile ray flowers, and a conical chaffy receptacle.There are about thirty species, exclusively North American. Rudbeckiahirta, the black-eyed Susan, is a common weed in meadows.
3. n:100 n. North American perennial herbs with showy cone-shaped flower heads