Lichens marins - Scytinium schraderi (Bernh.) Otalora, P.M. Jorg & Wedin.

Scytinium schraderi (Bernh.) Otalora, P.M. Jorg & Wedin.

Scytinium schraderi (Bernh.) Otalora, P.M. Jorg & Wedin.

Leptogium schraderi (Bernh.) Nyl.

Description

Thallus arranged in a small bush of 1-2 cm in diameter and 1-1.5 cm in height, formed of erect lobes, more or less circular and gelatinous (in humid weather) sometimes with very short secondary ramifications at the top, the most often dry and then furrowed and wrinkled, shiny, dark brown, reddish brown, blackish brown. Apothecia usually absent or scarce, otherwise at the top of the branches, constricted at the base, 0.5-1 mm in diameter, flat disc, reddish-brown, margin smooth or grainy. Spores hyaline, elliptical with pointed ends, 3 times septate or submuriform, 20-30 x 8-12 µm. Photobiont: Nostoc. Species occurring on the ground in dunes or on old walls, always in mosses where this species goes unnoticed.