Bryoria americana (Motyka) Holien

Graphis Scripta 6, 1: 40 (1994).

Basionym: Alectoria americana Motyka, Fragm. Florist. Geobot. 6: 449 (1960).

 

Protolog: Data lacking.

Protolog type data: Data lacking.

Type locality: Canada, New Brunswick, Grand Manan, 1879, Willey (US - holotype).

Type locality coordinates: Data lacking.

Molecular barcode: Data lacking.

Thallus: pendent, to 20 cm long, brown to dark brown, often with blackened fragmentation areas, slightly shiny. Irregularly branched, usually with wide branch angles, main branches often with thin perpendicular branches. Soralia absent to sparse, white, tuberculate or ?ssural, often recurving the branch. Pseudocyphellae sparse, fusiform and depressed, brownish, to 1 mm long. Apothecia locally common, to 2 mm diam.; disc brown, becoming convex. Spores ellipsoid, 5.5- 7 x 4- 5 μm. Pycnidia unknown.

Photobiont: Data lacking.

Chemistry: Medulla and soralia PD+ red (sometimes faintly); fumarprotocetraric acid (sometimes in low concentrations). Apothecia PD+ yellow; psoromic acid.

Ecology: On Picea and Betula in humid forests and at the edges of swamps. Reported from humid spruce forests of Norway, rare in Sweden and Finland but insufficiently known.

Distribution: Asia, coastal North America. Norway.

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