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The Morton Arboretum patch
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Silphium terebinthinaceum Jacq. (prairie dock), habit
August 3 1978
Armstrong, Patricia K.
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Floyd Swink and Teaching Environmental Awareness participants at the Indiana DunesMay 4 1981
Armstrong, Patricia K.
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Headstone and Prairie Plants at the Vermont Cemetery July 23 1978
Armstrong, Patricia K.
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Ray Schulenberg Watering Seedlings in Greenhouse December 1973
Godshalk, Clarence E.