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23b. Rudbeckia triloba Linnaeus var. rupestris (Chickering) A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 260. 1884.
Rudbeckia rupestris Chickering, Bot. Gaz. 6: 188. 1881
Cauline leaves (at least some) 3-lobed. Discs 15–20 mm diam. Ray laminae 20–30 mm.
Flowering mid summer–fall. Mesic woodlands; 100–1200 m; Iowa, Ky., N.C., Tenn.
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