66 FLORA OF THE MONTANA FORMATION. 
more resemblance to certain leaves of Eucalyptus than to the genus 
Podogonium. It is proper, however, to dismiss it from present con- 
sideration. 
In the Cretaceous and Tertiary Floras (p. 202) this species, from all 
the localities recorded in the Tertiary Flora, is referred to the Green 
River group, seemingly on the statement that they had come from 
Middle Park, White River, etc. No additional information is given on 
this point, and it may safely be set down as an error. 
In the Annual Report of the United States Geological and Geo- 
graphical Survey of the Territories for 1873 (p. 417), Lesquereux 
described a fruit and a leaflet from Middle Park and Florissant, Colo- 
rado. The first was not figured and is now lost, and the leaf referred 
to is probably one of those before mentioned. 
Habitat. — Point of Rocks and Black Buttes, Wyoming. 
Pterospermites Wardii n. sp. 
PL XV, fig. 4 ; PI. XVI, fig. 1. 
Leaf oblong-oval, rounded at base, abruptly acuminate at apex, 
margin serrate above the base, teeth numerous, sharp or obtuse, pointing 
upward; petiole long; midrib flexuose or nearly straight; secondaries 
alternate, six to eight pairs, at an angle of 40° or 45°, camptodrome, 
each joining the one next above by a seriesof small loops, from the outside 
of which slender branches enter the teeth ; at the base there is frequently 
a slender nerve starting below the lowest pair of secondaries, follow the 
margin in a series of short loops, and ultimately join the lowest pair of 
secondaries; nervilles prominent, mostly percurrent and at right angles 
to the secondaries; finer nervation not preserved. 
These leaves vary in length from 8.5 cm. and in width from 4.5 cm. 
to nearly 6 cm. The longest petiole is 3.5 cm. They appear to have 
been serrate only at some distance above the base, which is regularly 
rounded. The secondaries are all camptodrome, joining by arches from 
the outside of which short branches enter the teeth. 
The leaves referred to this species are somewhat anomalous, and it is 
with much uncertainty that they are referred to this genus. They have 
some resemblance to Pterospermites minor Ward 1 from the Fort Union 
group near the mouth of the Yellowstone River. This is excluded, how- 
ever, by the heart-shaped base and coarser teeth. 
Certain of these leaves have some resemblance to Crataegus antiqua 
Heer 2 and also to Euonymus Proserpinea Engelhardt, 3 but the resem- 
blance is only superficial. 
Habitat. — Point of Rocks, Wyoming (north of station and midway of 
cliff), and Black Buttes, Wyoming. Collected by Lester F. Ward, 
September, 1881. 
1 Types Lar. Fl., PI. XLII, figs 1-3. 
*FL Foss. Arct., Vol. VI, Abth. II, PI. VI, fig. 1 1. 
3 FI. Braunkoklen Tertiarsch. v. Dux., Nova Acta Kaisl. Leop. Caro. Deutsch. Akad. d. Naturf., Vol. 
LVII, No. 3, PI. XIV, fig. 4 (1891). 
