18 
Phylum, GINKGOPHYTA 
Order, Ginkgoales 
Genus, Ginkgo Linn 6 
Ginkgo adiantoides (Unger) Heer 
Salishuria adiantoides Unger, Syn. PI. Foss., p. 211, 1845. 
Ginkgo adiantoides Heer, FI. Foss. Arct., vol. 5, Abt. 3, 1878, p. 21, PI. ii, 
f. 7-10; Ward, U.S. Geol. Surv., Sixth Ann. Kept., 1884-85 [1886], 
p. 549, PI. xxxi, figs. 5, 6; idem, Bull. 37, 1887, p. 15, PI. i, figs. 5, 6; 
Lesquereux, U.S. Nat. Mus., Proc., vol. 10, 1887, p. 35; Knowlton, 
idem, vol. 17, 1894, p. 215; Geol. Soc. Am., Bull., vol. 5, 1893, p. 579; 
Washington Acad. Sci., Proc., vol. 11, 1909, pp. 197, 198, 204, 213; 
Jour. Geol., vol. 19, 1911, p. 370; Penhallow, Rept. Tert. PI. Brit. 
Col., 1908, p. 57, text fig. 12. 
This species had a Holarctic distribution during the Tertiary and is 
recorded from a large number of horizons. It is common in both the 
Lance and Fort Union formations of the United States. A single distal 
fragment of a leaf occurs in a lignitic clay in the Estevan on Sexton Hill 
creek near the headwaters of Medicine Lodge creek, NE. I sec. 21, tp. 7, 
range 3, W. 4th mer. Associated with this leaf fragment and also present 
at other localities are an abundance of lenticular circular fruits that may 
be of the same species. 
Ginkgo (?) stones 
Poorly preserved fruits of some uncertain plant are associated with 
the fragment of a Ginkgo leaf in the Estevan on Sexton Hill creek. They 
also occur in the Estevan in SW. i sec. 28, tp. 7, range 3, W. 4th mer. 
and in the Estevan above a coal bed in SW. | sec. 6, tp. 8, range 3, W. 
4th mer. 
These fruits very probably represent the stones of the drupaceous 
fruits of Ginkgo, although this is by no means conclusive. They are 
approximately circular in profile, lenticular in form, and about 1 cm. 
in diameter. There is an equatorial border nearly a millimetre in width — 
all features comparable to those of the stones of the existing Ginkgo. 
Phylum, CONIFEROPHYTA 
Order, Coniferales 
Family, pinaceae 
Genus, Taxodium L. C. Richard 
Taxodium duhium (Sternberg) Heer^ 
There is little point to discussing this composite species. It has an 
incredible range, both geologic and geographic, and is recorded as common 
in the Lance formation, although the equally common occurrences in the 
Fort Union are generally referred to Taxodium ocddentale Newberry. 
Some of each probably represent the other. 
^The very extensive synonymy is given in Berry, TJ.S. Geol. Surv., Prof. Paper 01, p, 171 (1016). 
