Taxon: Ptychomitrium tortula

Plate 144. Ptychomitrium tortula. 1, habit (× 2.5). 2, 3, leaves (× 20). 4, perigonium (× 30). 5, capsule (× 30). 6, calyptra (× 30). 7, leaf (× 30). 8, basal leaf cells (× 335). 9, upper leaf cells (× 335). 10, median leaf cells (× 335). 11, peristome teeth (× 335). (Drawn from Q.-W. Wang 3801, PE.)