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Fossil plants, Vol. 2 : $b A text-book for students of botany and geologySeward, A. C. (Albert Charles)

Science

Fossil plants, Vol. 2 : $b A text-book for students of botany and geology

Name: Fossil plants, Vol. 2 : $b A text-book for students of botany and geology
Author: Seward, A. C. (Albert Charles)

Seward, A. C. (Albert Charles)

Paleobotany

probably a fern, combining features which are now distributed among the
Marattiaceae, Osmundaceae and Cyatheaceae.

                   •       •       •       •       •

In addition to genera founded on true synangia or groups of free
or partially united sporangia, the literature of Palaeozoic ferns
contains several generic names applied to sporangia which occur
singly on Sphenopteroid or Pecopteroid pinnules. The following may
serve as examples; but it should be stated that these will probably
be transferred eventually to the Pteridosperms. It is, however,
immaterial whether they are dealt with here or in the chapter devoted
to the seed-bearing “ferns.”


                            _Dactylotheca._

Zeiller[1014] created this genus for fertile fronds of _Pecopteris
dentata_ Brongn. (= _P. plumosa_ Artis[1015]), a common British species
in the Upper and Middle Coal-Measures. Stur[1016] included _P. dentata_
in his list of species of _Senftenbergia_, the genus to which reference
was made under the Schizaeaceae.


_Pecopteris_ (_Dactylotheca_) _plumosa_ (Artis). Figs. 290, E, 292, 293.

  1825. _Filicites plumosus_, Artis, Antedil. Phyt. p. 17, Pl. XVII.

  1828. _Pecopteris plumosa_, Brongniart, Hist. vég. foss. p. 348, Pls.
        CXXI. CXXII.

   ——   _P. dentata_, Brongniart, _ibid._ Pls. CXXIII. CXXIV.

   ——   _P. delicatulus_, Brongniart, _ibid_. Pl. CXVI. fig. 6.

  1832. _Sphenopteris caudata_, Lindley and Hutton, Foss. Flor. Vol. I.
        Pl. XLVIII.; Vol. II. Pl. CXXXVIII.

  1834. _Pecopteris serra_, Lindley and Hutton, _ibid._ Vol. II. Pl.
        CVII.

  1834. _Schizopteris adnascens_, Lindley and Hutton, _ibid._ Vol. I.
        Pls. C. CI.

  1836. _Aspidites caudatus_, Goeppert, Syst. fil. foss. p. 363.

  1838. _Steffensia silesiaca_, Presl, in Sternberg, Flor. Vorwelt,
        Vers. II. p. 122.

  1869. _Pecopteris silesiacus_, Schimper, Trait. pal. vég. Vol. I. p.
        517.

   ——   _Cyathocarpus dentatus_, Weiss, Flora der jüngst. Stk. und
        Roth. p. 86.

  1877. _Senftenbergia plumosa_, Stur, Culm Flora, II. p. 187 (293).

   ——   _S. dentata_, _ibid._

  1886. _Dactylotheca plumosa_, Kidston, Cat. Palaeozoic Plants, p. 128.

  1888. _Dactylotheca dentata_, Zeiller, Flor. Valenc. Pls.
        XXVI.–XXVIII.

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