34 FLORA OF THE MONTANA FORMATION. 
Mybica Torre vi Lx. 
PL VI, figs. 1-3. 
Myrica Torreyi Lx., Ann. Kept. U. S. Geol. and Geog. Surv. Terr., 1872, p. 392 (1873) ; 
ibid., 1873, p. 399 (1874); ibid., 1876, p. 503 (1878); Tert. Fl., p. 129, PI. XVI, 
figs. 3-10 (1878). 
All but two of the figured types of this species are in the United 
States National Museum (Nos. 138, 139, 140, 141, 142). The species has 
been well described by Lesquereux, and none of the material since 
obtained adds to our knowledge of it. 
The collections made by Professor Ward at Point of Rocks, Wyoming, 
in 1881, contain a number of leaves that undoubtedly belong to this 
species. They have the same size, shape, and nervation, but differ 
slightly in having more numerous and finer teeth. Figs. 1 and 2 
are undoubtedly M. Torreyi, but fig. 3 has finely serrate margins and 
may possibly represent a new species. Leaves of this species were 
also obtained by Mr. Stanton and myself in 1896, on the Laramie Plains, 
near Dunn's ranch, 30 miles north of Laramie, Wyoming. The nerva- 
tion in these specimens is not well preserved, but otherwise there seems 
to be no difference. 
Habitat. — Black Buttes, Wyoming (type locality). Point of Rocks, 
Wyoming (figs. 1 to 3), north of station and midway of cliff; collected 
by Lester F. Ward, September 3, 1881. Dunn's ranch, 30 miles north 
of Laramie, Wyoming, and 6 miles east of Harpers Station; collected 
by Knowlton, Stanton, and Knight, July 24, 1896. 
Myrica? sp. 
PL VI, fig. 4. 
The small fragment figured was all of this form that could be found 
in the collection. It represents a part of the base of a leaf, only 3.5 cm. 
being preserved. The midrib is very thick for the size of the leaf, and 
there are numerous close, slender, parallel secondaries arising at an 
angle of about 45°. Their termination can not be made out nor can 
any of the finer nervation be seen. 
It seems probable that this specimen belongs to Myrica, but it is so 
fragmentary and obscure that it obviously can have little value. 
Habitat. — Coal mine on north fork of Dutton Creek, near old stage 
road, Laramie Plains, Wyoming. Collected by Knowlton, Stanton, and 
Knight, July 28, 1896. 
Populus obovata n. sp. 
PL VII, fig. 4. 
Leaf of firm texture, obovate or nearly elliptical in general outline, 
abruptly wedge-shaped at base, obtuse at apex; margin entire; nerva- 
tion nearly equally 4-palmate from the base, middle rib straight, second 
