Professor J.G. Jack stands next to a leaf sheath and closed spathe, 1928. Photograph by Alfred Rehder. Copyright © President and Fellows of Harvard College; Arnold Arboretum Archives, all rights reserved.
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Professor J.G. Jack stands next to a leaf sheath and closed spathe, 1928. Photograph by Alfred Rehder. Copyright © President and Fellows of Harvard College; Arnold Arboretum Archives, all rights reserved.
