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Symphyotrichum novae-angliae (L.) G.L.Nesom (New England aster), flowers hosting a butterflySeptember 1974
Armstrong, Patricia K.
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Andropogon gerardii Vitman (big bluestem), habitSeptember 1974
Armstrong, Patricia K.
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Andropogon gerardii Vitman (big bluestem), seeds on stem
September 1974
Armstrong, Patricia K.
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Andropogon gerardii Vitman (big bluestem), seeds on stemsSeptember 1974
Armstrong, Patricia K.
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Sorghastrum nutans (L.) Nash (Indian grass), seeds on stemsSeptember 1974
Armstrong, Patricia K.
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Sorghastrum nutans (L.) Nash (Indian grass), seeds September 1974
Armstrong, Patricia K.
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Filipendula rubra (Hill) B. L. Robins. (queen of the prairie), flowersJuly 8 1974
Armstrong, Patricia K.