. The geological history of plants. Paleobotany; 1888. LATER CRETACEOUS AND KAINOZOIC. 199 leares, known as Gredneria, found in the Cenomanian of Europe, and those called Protophyllum (Fig. 72) in America, appear to be nearer to the plane-trees than to any others, though representing an extinct type. The laurels are represented in this age, and the American genus Sassafras, which has now only one species, has not one merely but several species in the Cretaceous. Dios- pyros, the persimmon-tree, was also a Cretaceous FiQ. 'I'i.—Protophyllwm horeaU, Dawson, reduced. Upper Cretaoeons, Cai
. The geological history of plants. Paleobotany; 1888. LATER CRETACEOUS AND KAINOZOIC. 199 leares, known as Gredneria, found in the Cenomanian of Europe, and those called Protophyllum (Fig. 72) in America, appear to be nearer to the plane-trees than to any others, though representing an extinct type. The laurels are represented in this age, and the American genus Sassafras, which has now only one species, has not one merely but several species in the Cretaceous. Dios- pyros, the persimmon-tree, was also a Cretaceous FiQ. 'I'i.—Protophyllwm horeaU, Dawson, reduced. Upper Cretaoeons, Caiiada. The single species of the beautiful Liriodendron, or tulip- tree, is a remnant of a genus which had several Cretaceous species (Pigs. 74, 75). The magnolias, still well repre- sented in the American flora, were equally plentiful in the Cretaceous (Fig. 73). The walnut family were well repre- sented by species of Juglans (butternut) and Carya, or hickory. In all, no less than forty-eight genera are pres- ent belonging to at least twenty-five families, running through the whole range of the dicotyledonous exogens. This is a remarkable result, indicating a sudden profusion. 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 Dawson, John William, Sir, 1820-1899. New York, D. Appleton and Company
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