Ramalina siliquosa Chem. crassa forme des parois rocheuses verticales.
Ramalina crassa p.p.
This form is characterized by its shrivelled aspect (including the pending specimen), branches distorted, wide and swollen towards the base, its numerous pycnidia, verrucose, nodulose or pustular, surface skin toad-like, grey-greenish when moist, dull grey-yellowish when old or dry. When old, torn or lace-like, potentially regenerating from the base. Usually found on vertical walls of very exposed rocks subjected to sea-spray and highly exposed chapel walls near the seashore. Probably in part described previously under the name of Ramalina crassa s.l. since most specimen are C-, K+ yellow > red, KC+ +/- yellow tinged red, Pd+ yellow-orange (N.B. exceptions might be found with different chemotypes. This exemplifies the relative correlation between morphology traits and chemotypes). This taxon seems to be the most frequent form of Ramalina siliquosa Chem. crassa found on vertical walls (rocks or stoneworks) in the aerohaline zone.*