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Anemone occidentalis S.Watson (white pasqueflower), close-up of bud, stem and leavesCoulter, Ronald M.
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Mahonia nervosa (Pursh) Nutt. (Cascades grape-holly), a few leaflets with insect damage, developing fruitsCoulter, Ronald M.
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Quercus rubra (northern red oak), tree trunk and barkNovember 1968
Coulter, Ronald M.
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Quercus rubra (northern red oak), tree trunk and barkNovember 1968
Coulter, Ronald M.
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Populus deltoides (eastern cottonwood), bare twigs and branchesNovember 1968
Coulter, Ronald M.
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Platanus occidentalis (sycamore), trunks, branches, and autumn leavesNovember 1968
Coulter, Ronald M.
Article
The Characteristics Used in the "New Systematics" Approach to Classifying the Gramineae 1970
Coulter, Ronald M.
Map
Morton Arboretum, DuPage County, Illinois (topographic survey)circa 1970
Chicago Aerial Survey Co.
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Anemone occidentalis S.Watson (white pasqueflower), close-up of flowerJune 23 1970
Coulter, Ronald M.
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Aquilegia formosa Fisch. ex DC. (Western columbine), close-up of flowerJuly 10 1970
Coulter, Ronald M.
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Arctostaphylos nevadensis A.Gray (pinemat manzanita), branches with fruit and leaves August 1971
Coulter, Ronald M.
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Antennaria Gaertn. (pussytoes), close-up of pistillate flowerAugust 21 1971
Coulter, Ronald M.
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Anaphalis margaritacea (L.) Benth. & Hook.f. (pearly everlasting), habitSeptember 7 1971
Coulter, Ronald M.
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Thalictrum thalictroides (L.) Eames & Boivin (rue anemone), close-up flowersMay 18 1972
Coulter, Ronald M.
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Thalictrum thalictroides (L.) Eames & Boivin (rue anemone), close-up of flowersMay 18 1972
Coulter, Ronald M.