Radula complanata


Radula complanata is a common, green-coloured, leafy-liverwort in New Brunswick. It is recognized for its uniquely complicate-bilobed leaves, with larger, rounded dorsal lobes, and small, angular ventral ones attached to each other at the base and forming a small pocket. The dorsal leaves often have small lobules along the margins, that eventually turn into gemmae. Other distinctive characters include the small clusters of rhizoids being limited to the ventral surface of ventral leaf lobes, and the lack of underleaves along the stem.

Habitat and Distribution

Radula complanata is most often found on the bark of hardwood trees in mature, shady forests, but is sometimes found on vertical faces of boulders and cliffs or on rotting logs with bark. 

There are 108 records of Radula complanata in New Brunswick throughout all counties except Glocester; the species likely exists there, but has not yet been reported. It is widespread and common on trees, less common on other habitats. There are 90 records from the New Brunswick Museum  herbarium (35 primary, 55 associate taxa). Other significant collections include the UBC herbarium (15 collections).

Species Name:

Radula complanata

Family Name:


Species Authority: (L.) Dum.
Total Records held: 108
Total Records held at NBM: 90
Bibliography: Belland 1992, Clay and Richards 1996, Cole et al. 2008