The pictures on the left hand panels show a general array of leaf features from Conard, Henry S. and Paul L. Redfearn, Jr. 1979. How to know the mosses and liverworts, 2nd ed.
Wm. C. Brown Co. Dubuque, Iowa.
On the right are microscope images of
specific mosses displaying particular leaf features.
Cell Shape, two Examples: isodiametric and elongate
Cell Differentiation: Alar Cells Enlarged