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H.G.A. Engler, Pflanzenr., vol. 105(Pars prima): [Heft 70], (Cruciferae - Brassiceae Sub-tribe I-II): p. 7, fig. 3 (1919) [57]
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H.G.A. Engler, Pflanzenr., vol. 105(Pars prima): [Heft 70], (Cruciferae - Brassiceae Sub-tribe I-II): p. 7, fig. 3 (1919)