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Pat Armstrong sitting with class in Schulenberg Prairie
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Pat Armstrong in Schulenberg Prairie
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Silphium laciniatum L. (compass plant), flowers and leaves on stem
Armstrong, Patricia K.
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The Morton Arboretum patch
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Silphium terebinthinaceum Jacq. (prairie dock), habit, leaves Armstrong, Patricia K.
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Pat Armstrong studying plant in Schulenberg Prairie
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Pat Armstrong, headshot
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Pat Armstrong teaching a class in Schulenberg Prairie
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Pat Armstrong in front of Administration Building
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Helianthus annuus L. (common sunflower), habit, habitat July 29 1967
Armstrong, Patricia K.
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Morton Arboretum TEA Guides (Teaching Environmental Awareness) outside in the snow1970s