• 1Proposed
  • 2Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Sulcaria badia Brodo & D. Hawksw.

Go to another Suggested Species...

Scientific name
Sulcaria badia
Brodo & D. Hawksw.
Common names
IUCN Specialist Group
Assessment status
Proposed by
Jessica Allen
Jessica Allen, Troy McMullin
Comments etc.
Anders Dahlberg

Assessment Notes

Taxonomic notes

Why suggested for a Global Red List Assessment?

There are very few known populations of Sulcaria badia and negative impacts to the species from increasing residential and agricultural development have been documented. Additionally, two populations have already been reported as extirpated.

Geographic range

This species is endemic to the west coast of the United States and is found from Washington to northern California.

Population and Trends

This species was originally known from Washington, Oregon and California. However, the Washington population has not been successfully relocated (Peterson et al. 1998) and further searching did not result in any newly discovered populations in that area (Carlberg 2006).

Population Trend: Decreasing

Habitat and Ecology

This species grows predominantly on Gary oak and cherry trees (Brodo and Hawksworrth 1977), but has also been found on many other tree species (Carlberg 2006).

Temperate Forest


This species is most threatened by habitat loss due to increasing agricultural and residential areas as well as the increased air pollution (Peterson et al. 1998).

Housing & urban areasShifting agriculturePollutionAir-borne pollutants

Conservation Actions

Ensuring that populations of this species are not affected by any increasing human residential and agricultural development is essential. Additionally, it should be listed in the United States as an endangered species. Additionally, education and training of land managers and local botanists to identify the species should be conducted, and contracted experts should be hired to conduct detailed monitoring at various time intervals (every 5 to 10 years).

Site/area protectionSite/area managementSpecies recoveryEducation & awarenessFormal educationTrainingAwareness & communicationsLaw & policyLegislationNational level

Research needed

Research on the population size and genetics would greatly enhance our understanding of this species. Additionally, long-term monitoring projects need to be conducted.

Population size, distribution & trendsLife history & ecologySpecies Action/Recovery PlanPopulation trends

Use and Trade


Carlberg, T. 2006: Sulcaria badia, sponsorship for the CALS Conservation Committee. - Bulletin of the California Lichen Society 13(2): 45-50.

Brodo, IM/ Hawksworth, DL 1977: Alectoria and allied genera in North America. - Opera Bot. 42: 1-164.

Peterson, EB/ Greene, DM/ McCune, B/ Peterson, ET/ Hutten, MA/ Weisberg, P/ Rosentreter, R 1998: Sulcaria badia, a rare lichen in western North America. - The Bryologist 101(1): 112-115.

Known distribution - countries

Regional Population and Trends

Country Trend Redlisted