Greater Tundra Owl Lichen - Solorina octospora
State Rank Reason (see State Rank above)
In Montana known from one location in the northwest.
Thallus with normal, expanded lobes or just a narrow rim around the apothecia; apothecia with 8 spores per ascus (examine thin sections of the apothecia under the compound microscope); and cephalodia internal (McCune and Geiser 2009)
Small thallus with relatively large apothecia. Examine thin sections of the apothecia under the compound microscope and look for 8 spores per ascus.
An arctic-alpine species that extends southward in the Rocky Mountains to New Mexico (McCune and Geiser 2009).
On damp calcareous soil (alpine sod) in the alpine/sub-alpine zones.
Photobiont: green algae and cyanobacteria (nitrogen-fixer).
Reproduces sexually by spores from the apothecium; 8 spores per ascus.
Threats or Limiting Factors