Boulay, N. (76) Le Terrain Houiller du Nord de la France et les Végétaux Fossiles. Lille.
Bower, F. O. (91) Is the Eusporangiate or the Leptosporangiate the more primitive type in the ferns? Annals Bot. vol. V. p. 109.
—— (93) On the structure of Lepidostrobus Brownii, Schmpr. Annals Bot. vol. VII. p. 329.
—— (94) Studies in the Morphology of Spore-producing Members. Equisetaceae and Lycopodineae. Phil. Trans. R. Soc. vol. CLXXXV. p. 473.
—— (96) Studies &c. II. Ophioglossaceae. London.
—— (97) Studies &c. III. Marattiaceae. Phil. Trans. R. Soc. vol. CLXXXIX. p. 35.
—— (00) Studies &c. IV. The Leptosporangiate Ferns. Phil. Trans. R. Soc. vol. CXCII. p. 29.
—— (04) Studies &c. V. General Comparisons and Conclusions. Ibid. vol. CXCVI. p. 191.
—— (08) The origin of a Land Flora. London.
Bowman, J. E. (41) Observations on the characters of the fossil trees lately discovered on the line of the Bolton railway. Trans. Manchester Geol. Soc. vol. I. p. 112.