Buellia leptoclinoides (Nyl.) J. Steiner forme sciaphile.

    This form differs from Buellia leptoclinoides forme photophile by its occurrence on vertical silicate coastal rocks (schists) which are always moist and sheltered from direct sunlight. In the field, it closely resembles Buellia subdisciformis which differs by its larger apothecia and its more lively chemical reactions, particularly intense red K+.