E-Flora BC: Electronic Atlas of the Flora of British Columbia

General:
Small to occasionally medium stratified foliose lichens, corticate above and below, lacking soredia and isidia, lobes closely appressed to in part semi-erect, elongate-linear to elongate, averaging to 0.5–1.5 mm wide, thick. Upper surface pale grey to nearly black, bearing white angular markings/maculae. Lower surface tan or black, dull, apparently white-pruinose, lacking rhizines. Medulla white. Photobiont green. Apothecia located over upper surface; spores simple, ellipsoid, colourless, 8 per ascus.

Notes: Brodoa is an arctic-alpine genus containing three species worldwide, though only one of these occurs in B.C. Brodoa was formerly treated within Hypogymnia.

Reactions:
All spot tests negative.

Contents:
Calycin and pulvinic dilactone.