Irish lichens

Leptogium pulvinatum

Order: Peltigerales       Family: Collemataceae

Species: Scytinium pulvinatum (Leptogium pulvinatum)

Growth type crustose.
Photos: Among moss. Ballingeary and Glengarriff, Cork, SW Ireland.

Previously regarded as a morph of Leptogium gelatinosum.
Dark brown or reddish-brown thallus. Small, much divided lobes with fimbriate margins. The marginal extensions are flattened and never cylindrical. Apothecia red-brown or brown, asci usually 8-spored. Muriform spores 22-42 x 11-17 Ám. Isidia are absent. Micrographs below.

Occurs among moss on basic to calcareous substrata. Recently recognised, distribution is uncertain. Chemical reactions negative.

Similar: Leptogium lichenoides. Cylindrical marginal isidia.


Leptogium pulvinatum

Leptogium pulvinatum

Leptogium pulvinatum

Microscope photographs
Leptogium pulvinatum

Leptogium pulvinatum

Leptogium pulvinatum, cortex cells
Leptogium pulvinatum. August and November 2009

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