Leptogium diffractum Collemataceae
Pseudoleptogium diffractum (Leptogium diffractum)

Growth type foliose
Chemical results negative. BLS conservation evaluation: NT NS Sc

Rare, scattered and very local distribution on hard, damp limestone

Blackish-brown thallus with narrow, radiating, finely divided convex lobes, the rosette centres with convex areoles or partially missing. Apothecia are very rare, spores multi-septate to weakly muriform, 15-30 x 8-12 Ám.

Similar: Other rosette-forming limestone lichens include Collema fragile, Leptogium massiliense and Placynthium subradiatum


Leptogium diffractum

Leptogium diffractum
Pseudoleptogium diffractum (Leptogium diffractum)
On limestone. Portland, Dorset. February 2016

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