Figure 5.

Gametophytes and gametangiophores ancient and modern. (a) A reconstruction of mature male and female Remyophyton delicatum gametophytes. The antheridia are generally borne on shorter axes and the archegonia on longer ones. The substrate has been omitted to reveal the protocorms and rhizoids. Scale bar, 2 mm. Reproduced by permission of the Royal Society of Edinburgh from [62]. (b) Reconstruction of Lyonophyton rhyniense gametangiophore and short part of subtending axis. Antheridia borne on upper surface of cup. First published in [64]. Scale bar, 2 mm. (c) Illustration of subterranean gametophyte of living Lycopodium annotinum. Gametangia (not shown) borne on upper surface of convoluted disc. Scale bar, ca 2 mm. First published in [66].