Lichens marins - Schismatomma umbrinum (Coppins & P. James) P.M. Jorg et Tonsberg Cf.

Schismatomma umbrinum (Coppins & P. James) P.M. Jorg et Tonsberg Cf.

Schismatomma umbrinum (Coppins & P. James) P.M. Jorg et Tonsberg Cf.

Lecanactis umbrina Coppins & P. James

Description

Thallus thick, more or less tuberculous, greenish-brown in humid weather, brownish in dry weather, covering itself by the center with concolorous soredia becoming more or less confluent, hypothallus in general large and clearly visible, brownish with purple reflections. N.B. The whole becomes brownish in old age. Apothecia very rare, lecanorins, 1-1.5 mm in diameter, disc brown-black. Slightly curved fusiform spores, 3 times septate, 18-22 x 3-5 µm. C-, K-, KC-, P-; medulla: UV + white-bluish. Rare unspectacular species coming under the humid vertical siliceous rocks (in particular of slate schist) always sheltered from direct sunlight. N.B. Taxon very differently interpreted by the authors, this is why we publish it with Cf.

Schismatomma umbrinum Cf. Roc'h an Daol 1
Bernard BOUFFINIER

Schismatomma umbrinum Cf. Roc'h an Daol 2
Bernard BOUFFINIER

Schismatomma umbrinum Cf. Roche du Feu 1
Bernard BOUFFINIER

Schismatomma umbrinum Cf. Roche du Feu 2
Bernard BOUFFINIER

Schismatomma umbrinum Cf. Roche du Feu 3
Bernard BOUFFINIER

Schismatomma umbrinum Cf. Ardennes belges 1
Jacques HAINE

Schismatomma umbrinum Cf. Ardennes belges 2
Jacques HAINE

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