Fossil plants, Vol. 1: [A text-book] for students of botany and geology - A. C. Seward - Page №244

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[325] Rothpletz (94) p. 24.

[326] Lamarck (16) p. 188.

[327] Carpenter (62) Pl. X.

[328] Gümbel (71). Vide also Solms-Laubach (91) p. 39.

[329] Stolley (93).

[330] Schlüter (79).

[331] Saporta (91) Pl. XXXII. &c.

[332] Solms-Laubach (93), Pl. IX. figs. 1, 8.

[333] Cramer (90).

[334] Rothpletz (92²) p. 235.