Psoroma asperellum Nyl.
Details
Psoroma asperellum Nyl. (1863)
Psoroma asperellum Nyl.
Biostatus
Nomenclature
Nyl.
Nyl.
1863
24
ICN
Psoroma asperellum Nyl.
species
Psoroma asperellum
Classification
Associations
Descriptions
Psoroma asperellum Nyl.
Thallus small, squamulose, epiphytic on mosses in scattered colonies, to 3 cm diam., or on bark to 5 cm diam., squamules ascendent from an occasionally present, fine, black prothallus. Squamules small, delicate 0.3-0.8 mm wide, rounded, incised, minutely lobulate, rather loosely developed, not forming a tight crust, ascendent, pale greenish-grey to bright lettuce-green when wet, pale whitish-grey on storage, surface smooth, matt, not pruinose at margins, dispersed to crowded-imbricate. Cephalodia ± frequent, pale grey-blue, laminal and marginal, flattened, placodioid or minutely lobed, squamulose. Lower surface white, ± corticate, rhizines few or absent. Apothecia sessile, ± frequent, round, disc pale yellow-orange to pale red-brown, conspicuous, 0.5-1.5 mm diam., plane to subconvex, matt, continuous, eperforate, not gyrose-etched or pruinose, margins crenulate to minutely subsquamulose, overlying a thin, entire, pale proper margin. Ascospores ellipsoid-fusiform, 12-25 × 8-10 µm.
Taxonomic concepts
Collections
Metadata
6505ba96-dbcc-4490-8980-3c0092b39d4b
scientific name
Names_Plants
1 January 2000
14 June 2010