Professor J.G. Jack stands next to a leaf sheath and closed spathe, 1928. Photograph by Alfred Rehder.
Professor J.G. Jack stands next to a leaf sheath and closed spathe, 1928. Photograph by Alfred Rehder.
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Professor J.G. Jack stands next to a leaf sheath and closed spathe, 1928. Photograph by Alfred Rehder.
Professor J.G. Jack stands next to a leaf sheath and closed spathe, 1928. Photograph by Alfred Rehder.
