FIG. 3 in On the peristomes of the corticolous African species of Fissidens Hedw. (Fissidentaceae, Bryophyta)

FIG. 3. — Fissidens arboricola Brugg.-Nann. A, B, deeply divided peristome teeth; C, D, completely divided peristome teeth. A, OPL, in the background spiral filaments; B, IPL of two teeth with high, close horizontal to oblique ridges ("spiral"); C, OPL, the trabeculae are recognizable as thin lines, lamellar ornamentation of close oblique ridges; D, IPL basal and mid part with high, close oblique ridges. A, B from Madagascar, Toamasina, Analamazotra Forest Station, Brinda 12240 (type MO, L); C, D from Madagascar, Tulear, Forêt d'Analamaro, ALR-237, private herbarium Bruggeman-Nannenga. Scale bar: 20 µm.