CALS provides access to many resources, within the society and through our website, plus a list of external resources on the internet. Please choose from the list below.
- Photos by Species or Tag
- Off-site Lichen Photo Links
- CALS Email Discussion Group
- CALS on Facebook
- CALS on iNaturalist
- CALS on Twitter
- Regular Workshop – Tilden
- Regular Workshop – Marin (COM)
- Lending Library
- Map with Species Lists
- External Keys, Checklists, and Literature
- Ken Kellman’s index for the three volumes of the Lichen Flora of the Greater Sonoran Desert Region
- Glossary of lichen terminology by Dr. Bruce D. Ryan of Arizona State University