Locality
From Hollick (1930) (p. 89)
"Yukon River, north bank, about 17 miles below Nulato (original No. 33); collected by W. W. Atwood and H. M. Eakin in 1907 (lot 4639)."
Description
From Hollick (1930) (p. 89)
"Leaf about 7.5 centimeters in length by about 6 centimeters in width above the middle, apparently ellipsoidal or obovate in outline, with a rounded base and entire margin; nervation pinnate, consisting of three or possibly four pairs of subopposite secondaries that leave the midrib at acute angles of divergence, the lower pair suprabasilar, with branches on the under sides that diverge from the secondaries at acute angles and curve slightly upward at their extremities; basilar veinlets apparently simple, upward curved."
Remarks
From Hollick (1930) (p. 89)
"This leaf presents a different general aspect from any other of the Alaskan species of Credneria. The secondary nerves and the branches from the basal pair are more rigid and erect than in any other of the species, and the base of the leaf was apparently rounded rather than truncate. It is suggestive of the figure designated "Credneria spec." by Heer (1874) (p. 111, pl. 32, figs. 20, 21) from the Atane beds of Greenland; but in our specimen the base, which would provide a characteristic feature for identification, is defective, and Heer's figure lacks the upper part, so that no satisfactory comparison between them is possible."
This leaf base appears to be peltate.