Locality
From Hollick (1930) (p. 40)
"Yukon River, north bank, about 17 miles above Nahochatilton (original No. 2AC236); collected by A. J. Collier and Sidney Paige in 1902 (lot 2963) (pl. 1, fig. 6). Yukon River, north bank, 1 mile above Williams' mine (original No. 38); collected by W. W. Atwood and H. M. Eakin in 1907 (lot 4641) (pl. 1, fig. 7)."
Description
From Hollick (1930) (p. 40)
"Size and form of frond, also nervation, unknown; divisions pinnate; pinnae slender, elongated triangular, decurrent along the rachis, ascending, tapering to the tips, deeply pinnatifid below, the divisions becoming confluent above and forming crenate marginal extremities to the pinnae."
From Hollick (1930) (p. 40)
"This fern is almost identical in its characters with Anemia supercretacea Hollick (1902) (p. 245, pl. 3, figs. 6, 7) from the Upper Cretaceous of Colorado, differing for the most part merely in its more slender habit. It is possible, indeed, that the Alaska specimens may merely represent the upper parts of a branching frond of the species. More complete specimens would be necessary, however, to determine or disprove specific identity.
A fern from the Vermejo formation of southeastern Colorado is doubtfully referred to the species by Knowlton (Lee & Knowlton 1917) (p. 101, p. 248, pl. 30, fig. 5) but the reference hardly appears to be justified by the figure, which differs far more from the specific type than the specimens from Alaska."