USNM 37552 Platanus heerii Lesquereux  

Notes

Hollick (1930)

Pl. 46 Fig. 1

 

Locality

From Hollick (1930) (p. 84-85)

"Yukon River, north bank, between Pickart's mine and Nulato (original No. 358); collected by F. C. Schrader in 1899 (lot 7471) (pl. 43, fig. 2). Yukon River, north bank, near Nulato; collected by I. C. Russell in 1889 (pl. 46, fig. 1). Yukon RIver, north bank, about 12 miles below Melozi telegraph station (original No. 20); collected by W. W. Atwood and H. M. Eakin in 1907 (lot 4634) (pl. 55, fig. 2)."

 

Locality Map

 

Description

From Hollick (1930) (p. 84-85)

"Plate 43, Figure 2; Plate 46, Figure 1; Plate 55, Figure 2"

"Platanus heerii Lesquereux, U.S. Geol. and Geog. Survey Terr. Ann. Rept. for 1871, p. 303, 1872; The Cretaceous flora: U.S. Geol. Survey Terr. Rept., vol. 6, p. 70, pl. 8, fig. 4 [1]; pl. 9, figs. 1, 2, 1874; The Cretaceous and Tertiary floras: Idem, vol. 8, p. 44, pl. 3, fig. 1 ; pl. 7, fig. 5, 1883." (Lesquereux 1872; 1874; 1883)

"Knowlton, F. H., in Eakin, H. M., The Yukon-Koyukuk region, Alaska: U.S. Geol. Survey Bull. 631, p. 48, 1916." (Knowlton 1916)

 

Remarks

From Hollick (1930) (p. 84-85)

"Lesquereux included a considerable variety of leaf forms in this species, from the Dakota sandstone of Kansas - lobed and unlobed, dentate and entire - and his example was followed by Heer (1882) (p. 72, pl. 7, figs. 1, 2; pl. 8, figs. 1, 2a; pl. 9, figs. 1, 2, 3a, 4) in connection with leaves referred to the species from the Atane beds of Greenland.

The leaves represented by our Figure 2, Plate 43, and Figure 1, Plate 46, belong apparently to the unlobed form, with obscurely dentate margin, such as those depicted by Heer in his Figure 1, Plate 7, and Figure 2a, Plate 8; but the leaf represented by our Figure 2, Plate 55represents a broader, possibly lobed form.

Unlobed forms, with dentate margins, are figured by Ward (1886) (p. 552, pl. 40, figs. 8, 9) from the Eocene (?) of Wyoming, and Berry (1916) (p. 824, pl. 65, figs. 1 - 6; pl. 67, figs. 1 - 7) has referred a number of fragmentary specimens from the Raritan formation of Maryland and the District of Columbia to the same species."