File:Dryopteris alaskana Syntype USNM 245724.png

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Description
English: Dryopteris alaskana syntype specimen,

Late Middle - early Late Eocene, USGS site 3879, Kulthieth Formation; West shore of Yakutat Bay, Esker stream on Dalton's coal outcrop, Chugach Census Area, Alaska, USA

Smithsonian Museum specimen USNM 245724, collected by Tarr in 1905
Date
Source Wolfe; J.A. (1977). "Paleogene floras from the Gulf of Alaska region". United States Geological Survey; Professional Paper series 997: 1–108 & Plate 3. DOI:10.3133/pp997.
Author Wolfe, Jack A. (1977)

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