FIG. 7. — Fissidens gardneri Mitt. A in On the peristomes of the corticolous African species of Fissidens Hedw. (Fissidentaceae, Bryophyta)

FIG. 7. — Fissidens gardneri Mitt. A, OPL of undivided part of two teeth (left one broken off); B, side view of tooth; C, IPL lamellae with focus below the papillose surface to show the incrassate platelets; D, as C with focus on the papillose outer surface; E-H, same tooth at different levels; E, undivided part and bifurcation, or rather trifurcation with focus on the transparent OPL, the underlaying IPL is clearly visible; F, photo E with OPL cells outlined to show the single column of OPL cells; G, focus on IPL; H, photo G with IPL cells outlined to show the two columns with the zigzag border line. A-D from Tanzania, WSW of Morogoro town, Pócs 87041/R, EGR, private herbarium Bruggeman-Nannenga; E-H from Madagascar, Fianarantsoa, Magill & Crosby 12919, MO. Scale bars: 20 µm.