Fissidens macroglossus (Broth.) Brugg.

Bruggeman-Nannenga, Maria Alida, 2022, On the peristomes of the corticolous African species of Fissidens Hedw. (Fissidentaceae, Bryophyta), Cryptogamie, Bryologie 20 (2), pp. 9-36 : 23

Fissidens macroglossus (Broth.) Brugg. -Nann.

( Fig. 12 )

Fissidens macroglossus is characterized by wide, oblong to lingulate leaves, limbidia restricted to upper leaves of female stems reaching to half the length of the vaginant laminae, costae ending 9-21 cells below the apex, distal parts of the costae over a short or long distance covered by chlorophyllose cells, vaginant laminae slightly open, pluripapillose cells, peristomes undivided or irregularly divided, lamellae of undivided basal OP cells smooth, distal tooth parts densely papillose. On bark in a pure mats.

DISTRIBUTION. — West African endemic.

Peristome

Slightly curved inwards when moist, teeth stiff, undivided to deeply divided, 150-165 µm long, tooth base 36-40 µm wide, distal parts papillose.

Ornamentation

Basal three OPL cells undivided with smooth trabeculae and smooth lamellae, more distal lamellae papillose (“hairy”) ( Fig. 12B, C ); IPL basal trabeculae with papillose edges ( Fig. 12F ), basal lamellae smooth? (hard to observe), in distal direction the trabeculae become obsolete, lamellae of mid and distal part often incrassate, densely papillose.

Sporophyte

Seta 1.2-1.5 mm long, ± smooth; capsule cylindrical, 0.6- 0.8 × 0.25-0.3 mm (not conspicuously narrow), with exothecial cell columns ± 30-38, the cells oblong; operculum 0.25 mm long, spores subglobose, 18-24 µm, papillose.

Description

Brotherus (1931: 27).

Figures

FIG. 12. — Fissidens macroglossus (Broth.) Brugg.-Nann. A, OPL of three deeply divided teeth; B, C, E, details of Fig. A; D, distal parts of filaments,partly in sideview; E, OPL basal cells; F, IPL basal part. A-E from Ivory Coast, Bonaké, Porembski 33, private herbarium Bruggeman-Nannenga; F from Cameroon, Bipindi Urwaltgebiet, Zenker 2292, isotype of F. macroglossus, private herbarium Bruggeman-Nannenga. Scale bars: A, 50 µm; B-F, 20 µm.