PERMIAN FLORA.
(FIGURE 426. Walchia piniformis, Schloth. Permian, Saxony. (Gutbier, Die
Versteinerungen des Permischen Systemes in Sachsen volume 2 plate 10.)
a. Branch.
b. Twig of the same.
c. Leaf magnified.)
About 18 or 20 species of plants are known in the Permian rocks of England. None
of them pass down into the Carboniferous series, but several genera, such as
Alethopteris, Neuropteris, Walchia, and Ullmania, are common to the two groups.
The Permian flora on the Continent appears, from the researches of MM. Murchison
and de Verneuil in Russia, and of MM. Geinitz and von Gutbier in Saxony, to be,
with a few exceptions, distinct from that of the coal.
In the Permian rocks of Saxony no less than 60 species of fossil plants have
been met with. Two or three of these, as Calamites gigas, Sphenopteris erosa,
and S. lobata, are also met with in the government of Perm in Russia. Seven
others, and among them Neuropteris Loshii, Pecopteris arborescens, and P.
similis, and several species of Walchia (see Figure 426), a genus of Conifers,
called Lycopodites by some authors, are said by Geinitz to be common to the
coal-measures.
Pages:
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727