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

by A. C. Seward

[152] Heer (76) A.

[153] Corda, in Germar (52).

[154] Münster (42) A.

[155] Solms-Laubach (99).

[156] Germar (52).

[157] Bischof (53).

[158] Potonié (01) p. 754; (04) Lief ii.

[159] Goeppert, in Römer (54) Pl. XV. fig. 7.

[160] Spieker (53).

[161] Potonié (loc. cit.).