Primary: Lichen
Toxicity
- Very few lichens are poisonous, but those high in vulpinic acid or usnic acid are toxic. Most poisonous lichens are yellow
- Letharia vulpina (Letharia vulpina)
- Affect of poison?
- Strength of toxicity
- chemical affect (?) from the acids
(INCOMPLETE)
Secondary: Blue stain fungi and mountain pine beetles