Description:
Thallus fruticose, up to 10 cm wide, prostrate, no distinct main branches, thickest branches up to 0.4 mm diam. but usually < 0.2 mm diam., branching isotomic dichotomous, young branches brown, old branches blackish; with pseudocyphellae and soralia. Pseudocyphellae rare, straight, up to 0.3 mm long and 0.05 mm broad, in young branches sometimes with medulla showing, otherwise closed and blackish. Soralia globose, 0.3-0.5 mm diam, concolorous with thallus, on end of branches or terminating small side-branches near branch tips; soredia 14-20 µm diam. Cortex approaching Nodobryoria-type (see Common & Brodo 1995), with pseudoparenchymatous surface cells which look knobbly on the surface, below that prosoplechtenchymatous hyphae in a massive gelatinous matrix.
Chemistry : C – , K+ red (acicular crystals – microscope), Pd+ yellow; norstictic acid by TLC. Lichenan present in cell wall.

Distribution & Ecology: Falkland Islands. Two collections, growing over terricolous bryophytes.

Notes: Another collection, from the same locality as one of the collections, lacks norstictic acid but appears to be the same species.

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Thallus


Thallus