. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. FOSSIL BOTANY. 241 4. Fossil Conifers are found in the form of stumps, logs, leaves, and fruits. Tiiey were very unlike the ordi- nary Conifers of temperate climates. They resembled more or less the tropical Araucaria, the broad-leaved Chinese Salisburia (Ginko), or the curious two-leaved African WelvdtscMa. A very interesting genus is that of Cordaiies. It had a straight trunk, sometimes sixty to seventy feet
. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. FOSSIL BOTANY. 241 4. Fossil Conifers are found in the form of stumps, logs, leaves, and fruits. Tiiey were very unlike the ordi- nary Conifers of temperate climates. They resembled more or less the tropical Araucaria, the broad-leaved Chinese Salisburia (Ginko), or the curious two-leaved African WelvdtscMa. A very interesting genus is that of Cordaiies. It had a straight trunk, sometimes sixty to seventy feet long, and was clothed with long, strap-shaped leaves. 204. In the early part of the Reptilian Age (during the Triassic and Jurassic Periods) the Flora differed from the preceding age mainly in the enormous development of the Gymnosperms. These,—the Cycade (appearing now for the first time) and Conifers,—together with the Tree- Ferns, constituted the forest vegetation. There were also new species of Ferns and Equiseta. Diatoms and Desmida (division ZygoaporecB) were abundant. But it is in the latter part of this age (during the Cretaceous Period) that the greatest change took place. The Angiosperms for the first time make their appearance, and field and forest began to assume a somewhat modern aspect. Such modern genera as the Oaks, Maples, Willows, Sas- safras (Fig. 346), Dog-wood, Hickory, Beech, Poplar, Li- riodendron. Walnut, Syca- more, Laurel, etc., were each represented by one or 346 more species. The families to which the Angiosperms belonged are as follows : Fig. 346, Sassafras aralio^sis (Reptilian Age). 16. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kellerman, William Ashbrook, 1850-1908. Philadelphia, J. E. Potter and Company
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