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

by A. C. Seward

[842] Heer (55) A. Pl. XIII.

[843] Saporta (72) A. Pl. I. figs. 13, 14.

[844] Goeppert (36²) A. Pls. IV. V.

[845] Zeiller (88) A. p. 261.

[846] Williamson (77) Pl. VII.

[847] See Ch. XXVII.

[848] Goeppert (41) Pl. IV. figs. 1, 2.

[849] Zeiller (88) A. Pl. XI. figs. 3–5.

[850] Stur (85) A. p. 128.

[851] Solms-Laubach (91) A. p. 146.