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Liatris ligulistylis (Rocky Mountain blazing star), flowersAugust 1977
Armstrong, Patricia K.
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Teaching Environmental Awareness Program Participants at the West Chicago Prairie September 26 1977
Armstrong, Patricia K.
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Silphium laciniatum L. (compass plant), close-up of flowerJuly 13 1977
Armstrong, Patricia K.
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Packera paupercula (Michx.) Á.Löve & D.Löve (balsam ragwort) and Spartina pectinata Link (prairie cord grass), habit, habitatMay 23 1977
Armstrong, Patricia K.
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Andropogon gerardii Vitman (big bluestem), stalks and leavesSeptember 26 1977
Armstrong, Patricia K.
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Silphium terebinthinaceum Jacq. (prairie dock), habitat August 8 1977
Armstrong, Patricia K.
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Arabis perstellata var. shortii (Short's false rockcress), flowers and leaves on stemApril 1977
Kohout, Kitty
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Arenaria capillaris Poir. (beautiful sandwort), habit, habitat July 1977
Coulter, Ronald M.
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Arenaria capillaris Poir. (beautiful sandwort), habit, habitatJuly 1977
Coulter, Ronald M.
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Arisaema triphyllum (L.) Schott (Jack-in-the-pulpit), close-up of flowerhead December 1977
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Asarum caudatum Lindl. (British Columbia wild ginger), leaf, upper surfaceJuly 10 1977
Coulter, Ronald M.