Lichens of Belgium, Luxembourg and northern France

Distribution map of Collema tenax (Sw.) Ach.  by Paul Diederich   Collema tenax (Sw.) Ach.
« Collema polycarpon

Syn.: C. pulposum (Bernh.) Ach., C. palmatum auct.

Usually on soil, also along fissures on calcareous or slightly calcareous, siliceous rocks, normally in exposed, either natural or artificial, habitats, often abundant in ruderal conditions.

Belgium: Mar.: RR, Fl.: RR, Camp.: RRR, Brab.: RR, Mosan: AR, Ard.: RR, Lorr.: RR.

Luxembourg: Lorr.: AC.

France: Mar.: AR, Boul.: RRR, Pic.: RR, Mosan: RR, Lorr.: R.

Lit.: Boul.: 68, DG: 20, Ertz: 19, NL84: 13, Degelius (1954: 150-183).

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