Taxon: Pseudochorisodontium gymnostomum

Plate 57. Pseudochorisodontium gymnostomum. 1, leaf (× 17). 2, perichaetial leaf (× 17). 3, alar cells (× 325). 4, apical leaf cells (× 325). 5, 6, upper marginal leaf cells (× 325). 7, median leaf cells (× 17). 8, basal leaf cells (× 325). 9, cross section of leaf (× 325). 10, cross section of alar cells (× 325). 11, cross section of stem (× 325). 12, capsule (× 17). (Drawn from C. Gao 20565, IFSBH.)