LICHALP

Hydropunctaria scabra (Vězda) C. Keller, Gueidan & Thüs

Syn.: Verrucaria scabra Vězda

Lichenised.

Substrate:

Altitudinal range: from the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron) to the alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)

Note: a species differing from H. rheitrophila by an involucrellum enclosing entirely the perithecium and reaching the thallus base, where it fuses with the carbonised basal layer; on siliceous rocks in the amphibious zone of streams, often near rapids and waterfalls, but also on lake shores; widespread in Europe but only locally abundant; with a few records from the Eastern Alps, but perhaps overlooked or misidentified as H. rheitrophila elsewhere.