Parmotrema robustum is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. It can be identified by its thin, leaf-like thallus, few (or sometimes no) tiny hair-like structures (cilia) on the edges, short lobes with powdery edges, and a black underside with few root-like structures (rhizines), along with a wide brown area without these structures. It produces specific secondary metabolites (lichen products), including protocetraric acid and atranorin, and sometimes usnic and fatty acids.
From Wikipedia, under CC BY-SA 4.0.
Is it poisonous?
We have no record of Parmotrema robustum being toxic, poisonous or venomous. That is not proof that it is safe. Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.
Easily confused with
- Parmotrema margaritatum
- Parmotrema perlatum
- Cetrelia chicitae
- Cetrelia olivetorum
- Parmotrema arnoldii
- Cetrelia cetrarioides
Classification
- Kingdom
- Fungi
- Phylum
- Ascomycota
- Class
- Lecanoromycetes
- Order
- Lecanorales
- Family
- Parmeliaceae
- Genus
- Parmotrema
- Species
- Parmotrema robustum
Found one? Take a photo and B.inomen will suggest what it is, free.
Check your photo