RUDBECKIA
\ɹʌdbˈɛki͡ə], \ɹʌdbˈɛkiə], \ɹ_ʌ_d_b_ˈɛ_k_iə]\
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By Princeton University
By DataStellar Co., Ltd
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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.
By Oddity Software
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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.
By Noah Webster.
Word of the day
Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.