. Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments. Geology. 264 FOSSIL PLANTS OF [Oh. XV. In some specimens, as shown in the annexed figure, the fructifica- tion is distinctly I Fig. 204. Zasfrcea stiriaca, Ung. (Heer's Flora, pi. 143, fig. 8.) Natural size. Lower and Upper Miocene. Switzerland. a. Specimen from Monod, showing the position of the sori on the middle of the tertiary- nerves. ~b. More common appearance, where the sori remain and the nerves are obliterated. In the Upper Miocene flora of (Eningen already de
. Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments. Geology. 264 FOSSIL PLANTS OF [Oh. XV. In some specimens, as shown in the annexed figure, the fructifica- tion is distinctly I Fig. 204. Zasfrcea stiriaca, Ung. (Heer's Flora, pi. 143, fig. 8.) Natural size. Lower and Upper Miocene. Switzerland. a. Specimen from Monod, showing the position of the sori on the middle of the tertiary- nerves. ~b. More common appearance, where the sori remain and the nerves are obliterated. In the Upper Miocene flora of (Eningen already described the num- ber of forest trees and evergreen shrubs is very great. Their pre- dominance, however, in the period of the Lower Miocene was still more marked, and is characteristic of subtropical countries. No less than two-thirds of all the ligneous plants were evergreens. Among other features which cause this flora to resemble that of North America is the great abun- dance of trees of the order Amenta- cese, such as the oak, poplar, alder, birch, willow, hornbeam, plane, &c. The papilionaceous plants, of which there are twenty-four genera, are the most abundantly represented of all families, both in the Lower and Upper Miocene. But the laurels, of which there are only five genera, have contributed most leaves to the Miocene strata. Among these sev- eral species of Cinnamomum, as be- fore mentioned, are very conspicuous. Besides 0. polymorphum, before figured, p. 254, another species also ranges from the Lower to the Upper Molasse of Switzerland, and is very characteristic of different deposits of â 3innamomumIiossmcissleri,TIeer. Daph- Brown Coal in Germany. It has nogene cinnamomifolia, TJnger. Upper })een called Cinnamomum RosmtiSS- and Lower Miocene, Switzerland and ,., -r-,- , n nn . \ Germany. len by Heer (see fig. 204).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and app
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