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H.G.A. Engler, Pflanzenr., vol. 261 [Heft 96], (Orobanchaceae): p. 7, fig. 2 (1930) [66]
Illustration contributed by:
University of Toronto Library, Canada
H.G.A. Engler, Pflanzenr., vol. 261 [Heft 96], (Orobanchaceae): p. 7, fig. 2 (1930)
