Lichens marins - Lecidella elaeochroma forme lignicole.

Lecidella elaeochroma forme lignicole.

Description

Thallus crustose, thin, smooth to very finely grained, continuous, dirty yellowish-white, dirty cream with grayish or greenish tinges, without hypothallus but with blackish hypothallus if in mosaic. Apothecia numerous, sessile, regularly dispersed on the thallus, flat disc, black, blackish, sometimes with blue-black reflections but not powdery if dry, blackish-brown, reddish-brown if fresh and humid, clear margin, persistent, black. Clavate asci, with 8 spores and at the apex, I +. Spores ovoid to broadly elliptical, colorless, simple, 12-15 x 6-8 µm according to our measurements. C + yellow-orange, K + yellow, KC + yellow-orange, P-. Taxon occurring on worked wood or dead wood but with numerous thalli of Lecidella elaeochroma forma elaeochroma on the bark of nearby trees.