Taxon: Didymodon rivicolus

Plate 120. 1–6, Didymodon perobtusus. 1, habit (× 2). 2–5, leaves (× 40). 6, apical leaf cells (× 600). 7–13, Didymodon rivicolus. 7, branch (× 32). 8–11, leaves (× 40). 12, apical leaf cells (× 600). 13, basal leaf cells (× 600).