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File:Alnus hollandiana female cones USNM P36937 Plate18 Fig5.jpg

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Description
English: Knowlton Plate 18 fig 5; Alnus pistillate cones. Specimens later reidentified as Alnus hollandiana ovulate cones by Chaney & Axelrod, 1959.

Langhian (Barstovian), Middle Miocene; Coeur d'Alene Florule, Latah Formation; Edwards ranch, Stanley Hill, Coeur d'Alene, Idaho, U.S.A.

Department of Paleobotany, National Museum of Natural History, Smithsonian Institution, Washington, District of Columbia; specimen #P36937; collected by H. J. Rust, July, 1920
Date
Source Knowlton, F.H. (1926). "Flora of the Latah Formation of Spokane, Washington, and Coeur d'Alene, Idaho". Shorter contributions to general geology, 1925 (PDF) (Report). Professional Paper. 140. United States Geological Survey. pp. 17–55, plates VIII-XXXI. doi:10.3133/pp140A.
Author Knowlton. Frank Hall, 1926

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