Solorina saccata

Solorina saccata is notable for its large lower apothecia—reproductive structures that develop on the underside of the thallus rather than on the upper surface. This unusual placement of fruiting bodies is a key field character that separates it from most other foliose lichens in its habitat.

S. saccata grows directly on mossy limestone and calcareous soils, making it a calcicole species that requires base-rich conditions. It is typically found in mountainous or upland areas where exposed limestone and moss cover create the right combination of substrate and microclimate.

Look for S. saccata on moss-covered limestone and calcareous soil in upland or mountainous regions, where base-rich substrates support its growth. Its foliose thallus with distinctive lower apothecia helps distinguish it from other lichens sharing the same calcareous habitat.

The genus Solorina is known for species that can contain both green algal and cyanobacterial photobionts, often with cephalodia housing cyanobacteria. This photobiont arrangement contributes to the genus's ability to colonize the mossy calcareous substrates where S. saccata is found.