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

by A. C. Seward

[372] Hannig (98).

[373] Young and Kidston (88) A.

[374] Potonié (01²) fig. 72, p. 117.

[375] Stur (75) II. A. Pl. XXXVI. fig. 9.

[376] See Chap. XVII.

[377] Williamson (72) Pl. XLIV. p. 294: (93) (93²).

[378] Kidston (01) p. 60. See also Scott (00) p. 170, figs. 67, 68.

[379] Williamson (93), Pl. VIII. figs. 51, 52. See also figs. 67–69 given by Scott (00).

[380] Scott (00) p. 173.

[381] Scott [(08) p. 187] suggests that the projection may have formed a passage for the admission of the microspores, or of the spermatozoids which they produced.