Locality
From Hollick (1930) (p. 49)
"Yukon River, north bank, about 1 1/2 miles above Williams mine (original No. 36); collected by W. W. Atwood and H. M. Eakin in 1907 (lot 4642) (pl. 12, fig. 5). Yukon River, north bank, about 15 miles below mine No. 1 (original No. 3AH32); collected by Arthur Hollick and Sidney Paige in 1903 (lot 3271) (pl. 12, fig. 6). Yukon River, north bank, about 10 miles below Blatchford's mine (original No. 3AH23); collected by Arthur Hollick and Sidney Paige in 1903 (lot 3262) (pl. 12, fig. 7)."
Description
From Hollick (1930) (p. 49)
"Leaves suborbicular or reniform, about 7 centimeters in length by 8 centimeters in maximum width, abruptly and narrowly wedge-shaped at the base; margin entire; nervation flabellate, divergent, fine, dichotomously forked."
Remarks
From Hollick (1930) (p. 49)
"It is with some hesitation that I give these leaves a distinct specific name, especially as the specimens are imperfect, and all their characters can not be determined. They may represent merely a large, rotund form of Ginkgo laramiensia Ward (see pl. 12, figs. 3, 4), but their large size as well as distinctive shape appear to differentiate the species more or less satisfactorily."