Species, from the genus Frullania, may commonly be located on perpendicular surfaces. Substrates include shrubs, cliff surfaces, or rocks. Frullania is also common on alder, maple, and coniferous trees. In this photo Frullania is the darker bryophyte on the alder tree trunk.
Frullania is known as “Woodsman’s Eczema” because skin contact with this liverwort may cause dermatitis.
The color of Frullania nisquallensis shoots range from dark red brown to purplish brown. The branching of Frullania nisquallensis is pinnate.
The lateral leaves have a dark colored vitta and are incubously inserted. Lateral leaves are unequally and complicatedly bilobed, resulting in ventral lobules.
The lobule is helmet-shaped and has a curved inward pointed apex. There may be air trapped inside the lobule.
The underleaves are equally bilobed and transversly attached.