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Photographic image
Abies lasiocarpa (Hook.) Nutt. (subalpine fir) [left] and Abies amabilis (Dougl.) Forbes (Pacific silver fir) [right], branches, needlesJuly 1977
Coulter, Ronald M.
Photographic image
Abies amabilis (Dougl.) Forbes (Pacific silver fir), branch tip, needlesSeptember 1972
Coulter, Ronald M.
Photographic image
Abies amabilis (Dougl.) Forbes (Pacific silver fir) [left] and Abies lasiocarpa (Hook.) Nutt. (subalpine fir) [right], branchesJuly 1977
Coulter, Ronald M.