Gyalecta jenensis var. macrospora  Vezda

    Differs from the Gyalecta jenensis var. jenensis type by its larger ascospores, 30-35 x 10-16 µm across, and its habitat: mortar of old moist and shaded granite walls, also on weakly acid rocks near the seashore (micaschists). It is the most common variety in our prospection area. N.B. Another supralittoral xeric form associated to a Nostoc exists on highly exposed sandstone cliffs and on micaschist rocks subjected to seaspray and splashes, with a completely unconspicuous thallus. The form on micaschists seems to come on a biofilm of cyanobacteria (Nostoc), whereas the form on sandstones seems to be associated with free Trentepohlia aurea, see Gyalecta jenensis var. macrospora forma.*