Elements of geology, or, The Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments elementsofgeolog00lyel Year: 1868 4:64 PERMIAN FLORA. [Ch. XXIII. Gardiocarpon Ot- Fig. 510. nopteris erosa, and S. lobata, are also met with in the government of Perm in Russia. Seven others, and among them JVeuropteris Loshii, Pecopteris arhorescens, and P. similis, with several species of Walchia- (see fig. 508), a genus of Conifers, called Lyco- podites by some authors, are common to the coal-. measures. Among the genera also enumerated by Co
Elements of geology, or, The Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments elementsofgeolog00lyel Year: 1868 4:64 PERMIAN FLORA. [Ch. XXIII. Gardiocarpon Ot- Fig. 510. nopteris erosa, and S. lobata, are also met with in the government of Perm in Russia. Seven others, and among them JVeuropteris Loshii, Pecopteris arhorescens, and P. similis, with several species of Walchia- (see fig. 508), a genus of Conifers, called Lyco- podites by some authors, are common to the coal-. measures. Among the genera also enumerated by Colonel Ghitbier are the fruit called Cardiocarpon (see fig. 509), Asterophyllites, and Annularia, so characteristic of the Carboniferous period ; also Lepidodendron, tonis. Gutbier. which is common to the Permian of Saxony, Thurin- Penman, saxony. giEj anc[ Russia, although not abundant. JSfoeggera- thia (see fig. 510), supposed by A. Brongniart to be allied to Cycas, is another link between the Permian and Carbonif- erous vegetation. Coniferse, of the Araucarian division, also occur; but these- are likewise met with both in older and newer rocks. The plants called Sigillaria and Stigmaria, so marked a feature in the Car- boniferous period, are as yet wanting. Among the remarkable fossils of the roth- liegendes, or lowest part of the Permian in Saxony and Bohemia, are the silicified trunks of tree-ferns called generically Psaronius. Their bark was surrounded by a dense mass of air-roots, which often constituted a great addition to the original stem, so as to double or quadruple its diameter. The same remark holds good in regard to certain living extra- tropical arborescent ferns, particularly those of New Zealand. Psaronites are also found in the uppermost coal of Autun in France, and in the upper coal- measures of the State of Ohio in the United States, but specifically different from those of the rothliegendes. They serve to connect the Permian flora with the more modern porti
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