Lesser Tundra Owl Lichen - Solorina bispora
State Rank Reason (see State Rank above)
Known from a few locations in western Montana.
Thallus foliose, generally poorly developed, mostly less than 1 cm wide, often just a small lobate rim on the apothecia; apothecia with 2 spores per ascus; lower surface tightly appressed to the substrate and difficult to determine; and photobionts green and blue-green (McCune and Geiser 2009)
Small thallus with relatively large apothecia. Examine thin sections of the apothecia under the compound microscope and look for 2 spores per ascus.
Mostly an arctic-alpine species, extending south in the Rocky Mountains to Colorado (McCune and Geiser 2009).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
On calcareous soil or humus on moist sites in alpine to subalpine habitats.
Photobionts: green algae and cyanobacteria (nitrogen-fixer).
Reproduces sexually by spores from the apothecium. There are two spores per ascus.
Threats or Limiting Factors