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

by A. C. Seward

[2] Chap. XI.

[3] ibid. p. 405.

[4] Sternberg (23) A. p. 33, Pl. XXVI. figs. 4 a, 4 b.

[5] Scott (05) p. 34.

[6] Zeiller (88) A. Pl. LXII. figs. 2—4.

[7] Vol. I., p. 397.

[8] Kidston (01) p. 128, fig. 25; (02) p. 361, fig. 13.

[9] Bower (08) p. 404, fig. 221.

[10] Kidston (91) p. 59, Pl. I.; (01) p. 123, fig. 22.

[11] Scott (05).