Fossil plants, Vol. 1: [A text-book] for students of botany and geology

by A. C. Seward

[135] Solms-Laubach (91), p. 29.

[136] Göppert (57). Some of the large silicified trees mentioned by Göppert may be seen in the Breslau Botanic gardens.

[137] An example referred to by Carruthers (71) p. 444.

[138] Williamson (71) p. 507.

[139] Dealt with more fully in vol. II.

[140] Bentham (70).

[141] See also Bunbury (83) p. 309.

[142] Seward (96) p. 208.

[143] Darwin (90) p. 416.

[144] Solms-Laubach (91) p. 9.