Arthonia stellaris grows on smooth bark of deciduous trees in oceanic forests and woodlands from Rogaland to Møre og Romsdal. It is recognized by reddish brown to brown-black, narrowly elongated to star-shaped apothecia on a thin thallus with trentepohlioid photobiont. The brown and warted spores are divided by 3–4 transverse septa, the apical cell is enlarged.
Arthonia stellaris
Kremp.
|
Andreas Frisch
|
NTNU Vitenskapsmuseet
|
Håkon Holien
|
NORD Universitet
