Caliciaceae on Macrolichens of Alaska

Acolium inquinans & Pseudothelomma occidentale

Mon, 01 Jan 0001 00:00:00 +0000

Acolium inquinans & Pseudothelomma occidentale #

Taxon #

Acolium inquinans, Pseudothelomma occidentale

Organization #

Select Crustose Lichens, Caliciales

Somewhat similar in appearance to Calicium tigillare and Calicium pinicola but with thalli which are gray rather than bright yellow. P. occidentale with immersed thalli and A. inquinans

Substrate #

Both preferring wood, especially wooden handrail in harbors, but with A. inquinans being reported as more flexible being found occasionally on bark or rarely on rock (CLH).

Acroscyphus sphaerophoroides

Mon, 01 Jan 0001 00:00:00 +0000

Acroscyphus sphaerophoroides #

Taxon #

Acroscyphus sphaerophoroides

Organization #

Caliciales

Identification #

A fruticose species which is off white to gray in color with spectacular, conspicuous, black apothecia growing from the branching tips of coralloid mounds. Does not produce soredia. The species also lacks isidia although the young growths may appear similar to isidia.

Substrate #

In Alaska the species has only been collected from Admiralty Island where it has been found growing on rock (Anderson 2012, Spribille et al. 2023). In British Columbia the species is also found growing on snags or dead portions of living conifers (COSEWIC 2016).

Calicium tigillare & Calicium pinicola

Mon, 01 Jan 0001 00:00:00 +0000

Calicium tigillare & Calicium pinicola #

Taxon #

Calicium tigillare and Calicium pinicola

Organization #

Caliciales

Identification #

Bright yellow crustose species withblack apothecia (less conspicuous in these species compared to Tholurna and Acroscyphus). In C. tigillare the apothecia are immersed while they are exposed in C. pinicola. These are two of the few crustose species included in this guide due to their conspicuous highlighter-yellow color and because the species may not be common in Alaska and may deserve conservation attention in the state.