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

by A. C. Seward

[505] Potonié (93) p. 179, Pl. XXV. figs. 2–4.

[506] Renault and Zeiller (88) p. 396, Pl. LVII. fig. 7.

[507] Lindley and Hutton (31) Pl. CXIV.

[508] Schoenlein and Schenk (65) Pl. V. fig. 1.

[509] Schimper and Mougeot (44) p. 58, Pl. XXIX.

[510] Jäger (27).

[511] Schimper (74) Pls. IX–XI.

[512] Schimper and Koechlin-Schlumberger (62).

[513] Schoenlein and Schenk (65) Pls. I–IV.

[514] Brongniart (28) p. 115, Pl. XIII.