[742] Gwynne-Vaughan (08).
[743] Bertrand and Cornaille (02).
[744] Chodat (08) p. 15.
[745] See also Pelourde (09) for an account of the anatomy of fern petioles.
[746] Observed in plants in the Botanic Gardens of Brussels and Leipzig. A.C.S.
[747] For an account of the spore-producing members of the Marattiaceae, see Bower (97).
[748] Zeiller (90) p. 19.
[749] Shove (00); Tansley (08).
[750] Farmer and Hill (02) Pl. XVIII. figs. 26, 28.
[751] Christ and Giesenhagen (99).