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

[815] Zeiller (88), p. 355.

[816] Weiss (84), p. 96.

[817] Sterzel (93), p. 66.

[818] Zeiller, loc. cit. p. 353.

[819] Sternberg (25), Pl. XLIX. fig. 5.

[820] Brongniart (28²), p. 128, Pl. XIX.

[821] Germar and Kaulfuss (31), p. 221, Pl. XLV. fig. 1.

[822] Lindley and Hutton (31), Pl. CCXVI.

[823] Grand’Eury (77), p. 293.

[824] Zeiller (80), Pl. CLXXIV. (expl. plates) fig. 3.