General:
Small stratified foliose lichens, corticate above and below, sorediate or not, lobes closely appressed, elongate, averaging to 1 mm wide, thin. Upper surface whitish. Lower surface black, shiny, lacking rhizines, dimpled with numerous minute pits. Medulla white. Photobiont green. Apothecia located over upper surface, disc brownish; spores simple, globose, colourless, 8 per ascus. Over conifer branches and lignum.

Notes: The genus Cavernularia contains only two species, both of which occur in B.C.

Species description:
Thallus without soredia; apothecia generally present

Reactions:
All spot tests negative.

Contents:
No lichen substances reported.

Source:  Lichens of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration By:  Trevor Goward