Taxon: Ptychomitrium dentatum

Plate 138. Ptychomitrium dentatum. 1, habit (× 5). 2, calyptra (× 30). 3, 4, leaves (× 30). 5, perigonium (× 30). 6, capsule (× 30). 7, apical leaf cells (× 335). 8, median leaf cells (× 335). 9, basal leaf cells (× 335). 10, cross section of costa (× 335). 11, spores (× 335). (Drawn from S.-D. Zhao & Z.-F. Fang s.n., IFSBH.)