FIG. 1. — Fissidens marthae Cardot. A in On the peristomes of the corticolous African species of Fissidens Hedw. (Fissidentaceae, Bryophyta)

FIG. 1. — Fissidens marthae Cardot. A, OPL mid tooth, showing the bifurcation and filaments; B, OPL basal undivided part and bifurcation; C, IPL showing fimbriate trabeculae of the undivided part and high horizontal to oblique IPL ("spiral") ornamentation of the filaments; D, basal OPL of two teeth; E1-3, side-views of basal part of filament showing the low OPL and thicker IPL; E1, focus on the vertical walls of the OPL; E3, stack of E1 and 2; F, spores. A, D, E from Uganda, Mupanga Falls, Porley U495A, private herbarium Bruggeman-Nannenga; B from Tanzania, Pócs 8633/M, PC; C, F from Central African Republic, S. Ippy, Kéyorédé, Tisserant s.n., PC. Scale bars: A-E, 20 µm; F, 50 µm.