Gyalolechia A. Massal

A key to the species of Gyalolechia from China 1 Thallus with schizidia.........................................................................................................................................................................2 - Thallus without schizidia....................................................................................................................................................................3 2 Thallus covered with whitish pruina ..................................................................................................................................................4 - Thallus without whitish pruina...........................................................................................................................................................5 3 Thallus almost foliose with distinctly lobate....................................................................................................................... G. fulgens - Thallus areolate to squamulose ..........................................................................................................................................................6 4 Ascospores septate......................................................................................................................................................... G. desertorum - Ascospores aseptate, single-celled ............................................................................................................................. G. subbracteata 5 Having granulose thallus ................................................................................................................................................... G. epiphyta - Having an areolate to squamulose thallus ..........................................................................................................................................7 6 Upper surface smooth............................................................................................................................................... G. flavovirescens - Upper surface farinose....................................................................................................................................................... G. farinosa 7 Marginal lobes distinct, upper cortex with numerous crystals ......................................................................................... G. pustutata - Marginal lobe indistinct, upper cortex palisade-plechtenchymatous .............................................................................. G. bracteata