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Keywords from Image Description:
Pappophorum vaginatum as P. apertum LS. en Pappophorum vaginatum Buckley whiplash pappusgrass Listed as Pappophorum apertum Scribn in the manual HitchcockChase Collection of Grass Drawings courtesy of the Hunt Institute for Botanical Documentation Carnegie Mellon University Pittsburgh Pa on indefinite loan from the Smithsonian