rud·beck·ia /ˌrʌdˈbɛkiə, rud-/
黃雛菊屬
Rud·beck·i·a n. Bot. 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.
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Rudbeckia
n : North American perennial herbs with showy cone-shaped flower
heads [syn: genus Rudbeckia]