File:EB1911 Palaeobotany - Cordaianthus.jpg

English: Drawings of Cordaianthus: A, C. Williamsoni (part of longitudinal section of ♀ catkin). a, axis, showing v, bundles in tangential section; br, bracts; d, short axillary shoot, bearing a bracteole and a terminal ovule; i, integument; n, nucellus of ovule; ov, another ovule seen from the outside. B, C. Grand' Euryi (nucellus of an ovule). p.c., pollen-chamber; s, canal leading to p.c.; p, pollen-grains in p.c.; p′, do. in canal. C, C. Grand' Euryi (lower part of canal, enlarged). o, cavity of canal, surrounded by a sheath of cells, dilated towards the bottom of canal, in which a large pollen-grain is caught; ex, exterior of pollen grain; in, internal group of prothallial or antheridial cells. D, Cycadinocarpus augustodunensis (upper part of seed, in longitudinal section). i, integument; mi, micropyle; n, remains of nucellus; p.c., pollen-chamber (containing pollen-grains), with its canal extending up to the micropyle; pr, part of prothallus; ar, archegonia.