Brief Summary

Read full entry


 Thallus: shrubby to subpendant, 2 to 12 cm long, forming dense erect to subpendant tufts; branching: anisotomicdichotomous; basal part: concolorous with the branches, to distinctly blackened; branches: cylindrical to irregular, inconspicuously segmented; lateral branches: not narrowed at point of attachment; segments: terete and ±cylindrical, sometimes slightly swollen, foveoles or transversal furrows often present; papillae: usually numerous especially on main branches, verrucous to cylindrical; tubercles and fibercles: generally absent; fibrils: unevenly distributed; soralia: deeply excavate, tearing off the cortex around the soralia, as large as the branches when mature, often reaching the central axis and encircling the branches, ±widely spaced and usually not confluent, arising initially on the cortex; soredia: generally farinose; isidiomorphs: always absent; Apothecia: not seen; cortex: thin (5-7%); medulla: thick, lax to dense; axis: thin to moderately thick; Spot tests: medulla K+ yellow turning dark red (or deep yellow), C-, KC-, P+ orange or K-, C-, KC-, P+ deep yellow; Secondary metabolite: salazinic acid (major) or psoromic acid (major), respectively relative to spot tests.; Substrate and ecology: on bark, especially on Abies spp., Pinus spp., Picea spp, and Quercus spp., usually in mixed conifer forests, between 2300 and 3400 m; World distribution: holarctic, mainly in continental areas; Sonoran distribution: common at upper elevations in Arizona and extending to Chihuahua, rare in coastal areas of southern California and Baja California.; Notes: For differences between Usnea lapponica and U. fulvoreagens, see under the latter species. 


Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

Belongs to 0 communities

This taxon hasn't been featured in any communities yet.

Learn more about Communities


EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!