Locality
From Hollick (1930) (p. 102)
"Yukon River, north bank, just above Pickart's mine (original No. 3AH18a); collected by Arthur Hollick and Sidney Paige in 1903 (lot 3254)."
Description
From Hollick (1930) (p. 102)
"Leaf irregularly oblong-elliptical, slightly inequi-lateral, entire, 4.75 centimeters in length by 2.5 centimeters in width across the middle, rounded to the apiculate apex and tapering below to an acute cuneate base; nervation simply pinnate; secondary nerves irregularly spaced and disposed, numerous, leaving the midrib at angles of approximately 45° on one side and at somewhat more obtuse angles on the other, all curving upward and thinning out close to the margin."
Remarks
From Hollick (1930) (p. 102)
"This leaf possesses similar characters to one of the specimens of Rhamnites apiculatus Lesquereux (1892) (p. 171, pl. 37, fig. 12) from the Dakota sandstone of Kansas, which might almost be regarded as a small form of our species; but the other leaves which Lesquereux (1892) (figs. 8 - 11) includes in the species are very different and could scarcely be regarded as specifically identical with ours.
Two other species that are strikingly similar in appearance to ours are Cornus holmiana Heer (1883) (p. 36, pl. 62, fig. 12; pl. 64, figs 6 - 7) and Cornus thulensis Heer (1883) (p. 37, pl. 62, figs. 9, 10a, 11) both from the Patoot beds of Greenland. The secondary nervation of these two species is suggestive of Rhamnites rather than of Cornus, and our leaf might possibly be regarded as specifically identical with one or the other."