Taxon: Fissidens incognitus

Plate 81. 1–6, Fissidens incognitus. 1, habit (× 17). 2, leaf (× 33). 3, apical leaf cells (× 315). 4, marginal cells of apical laminae (× 315). 5, cross section of leaf (× 315). 6, cross section of stem (× 210). 7–12, Fissidens involutus. 7, habit (× 6). 8, leaf (× 22). 9, apical leaf cells (× 210). 10, marginal cells of apical laminae (× 210). 11, cross section of leaf (× 210). 12, cross section of stem (× 210). (1–6, drawn from W.-X. Xu 11428, SYS; 7–12, from 1974 Team 3183, SYS.)