Species: Physcia tenella
Photos: On ornamental Sorbus trunk. Macroom, Cork, SW Ireland.
Small thallus with +/- erect, long, whitish-grey lobes covered with small pseudocyphellae, margins with long, whitish cilia. Lobe ends split revealing lip-shaped, cream coloured soralia. Dark apothecia.
Pioneer species, usually occurs on nutrient-rich branches and twigs, occasional on rock. Thallus: K+ yellow. Medulla: K-
Similar: P. adscendens. Hood-shaped lobe ends. Usually on rocks.
Physcia dubia, lacks marginal cilia.
The lichenicolous fungus Syzygospora physciacearum can be found on Physcia species.