Lichens of Belgium, Luxembourg and northern France
Lasallia pustulata (L.) Mérat |
Syn.: Umbilicaria pustulata (L.) Hoffm.
On exposed, siliceous and sandstone rocks, exceptionally on the roots of Pinus, usually abundant but very sensitive to trampling.
Belgium: Mosan: RR, Ard.: AC-AR.
Luxembourg: Ard.: R, Lorr.: R.
France: Ard.: R.
Lit.: La66: 354-357, NL77: 20, NL92: 170, Diederich (1986a: 119-120).