'l'he Fossil Flora of the Bozeman Cuul Field. 153
THE FOSSIL FLORA OF THE BOZEMAN COAL FIELD.*
BY F. H. KNOWLTO:N".
[Abstract.]
The first collection of fossil plants from what is now very gen
erally known as the Bozeman Coal Field, l\Iontana, was made in 1871 by the members of Dr. F. V. Hayden's party while they were encamped at Fort Ellis preparatory to beginning their memora
ble exploration of the Yellowstone Xational Park. The actual collecting was done by Dr. A. C. Peale, l\Ir. W. IL Holmes, and Mr. Joseph Savage, arnl the specimens were all obtained on the same day and from the same vicinity, although not all at exactly the same spot. As the country was at that time new and unset
tled, the nearest fixed point was the military reserrntion of Fort Ellis, and the specimens were labeled l>y the various collectors as follows: "S'ix miles above Spring Canon (now known as Rocky Canon), near Fort Ellis, Montana;" ''Above Spring Canon, near Fort Ellis," and" Xear Fort Ellis, above coal."
These specimens were identified by Prof. Leo Lesquereux, and represent about 30 species, nearly one-third of which were then regarded as now to science.
In recent years quite extensive additional collections have been made, both at the original localities and a number of newly discovered ones, by Dr. Peale, l\fr. W. II. W ccd, and myself.
These, together with most of the original specimens that are fortunately preserYed in the United States Nation.al l\Iuseum, have furnished the basis of the present examination.
As at present understood, the flora of the Bozeman Coal Field embraces 43 species. Of this number 3 are regarded as new to science, while a number of others are of exceptional biological interest.
Thin1lfeldia polymorpha Lx ., sp , the Salisburia polymorpha Lx., of the original collection, is represented �y a great number of finely preserved leaves, which arc long, wedge-shaped in outline, narrovrnd from above the middle downward into a strong, thick petiole, and rounded, erose or irregularly undulate or toothed at the apex. The nen;.ation consists of a stron5 mid vein, continu
ing to or vanishing just below the apex, and numerous thin,
*
Read before the Biological Society of Washington, l\farch 19, 1892.uj 'AOAang -o^r
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