| Status of species |
A rare species. Registered in the Red Data Book of Estonia and in the
Lists of endangered lichens species in Germany, Austria and Poland. |
| Distribution |
Central and western part of Latvia. |
| Habitat |
Occurs on stones in rivers and streams at water level; often covered
by flood - waters, particularly in spring. |
| Occurance |
Singly specimens occur. |
| Reproduction |
By spores. |
| Changes in number and distribution |
Found for the first time in Latvia near Dundaga on stones of a small
stream (A. Bruttan, 1870). It is negatively affected by water pollution. |
| Existing protection |
A locality is known in Slītere reserve. Red Data Book of Latvia, 1992. |
| Suggestions for study |
Lichen biology and dynamics of population development should be studied. |