Placopsis cribellans (Nyl.) Räsänen
Details
Placopsis cribellans (Nyl.) Räsänen (1940)
Placopsis cribellans (Nyl.) Räsänen
Biostatus
Nomenclature
Classification
Synonyms
Descriptions
Placopsis cribellans (Nyl.) Räsänen
Thallus determinate, effigurate, lobate at margins, forming ± orbicular and often confluent patches, to 6 cm diam., prothallus absent. Marginal lobes closely attached, flattened, simple or irregularly branched, usually richly divided and markedly crenulate, discrete, separated by narrow cracks, with rounded or subcrenulate ends. Upper surface creamish or whitish to pale olive-brown, matt, epruinose, without soredia, centrally cracked or indistinctly areolate, pitted-punctate with minute pock-like depressions resulting from abrasion of isidia. Isidia terete, simple, 0.1 mm diam., subglobose, often crowded centrally. Cephalodia sessile, scattered, flattened orbicular, or depressed convex, 0.8-5.0 mm diam., radially folded and wrinkled or cracked, yellowish-brown or pinkish, matt. Apothecia scattered, rotund, subpedicellate 0.5-1.5 mm diam., thalline margin prominent, entire or subcrenulate, proper margin thin, flesh-coloured, disc plane or subconvex, pale pink to dark red or brownish matt, white pruinose. Hymenium 90-150(-180) µm tall, pale yellowish. Hypothecium colourless. Ascospores ellipsoid 12-16.5 × 6-9 µm. Pycnidia immersed, forming minute swellings with punctiform brownish ostioles. Conidia filiform, slightly curved, 21-29 × 0.5 µm. Chemistry: Cortex K+ yellowish, C+ rose; medulla K+ yellow (faint), C+ rose, Pd-.
Taxonomic concepts
Lecanora cribellans Nyl.
Placopsis cribellans (Nyl.) Räsänen
Lecanora cribellans Nyl.
Placopsis cribellans (Nyl.) Räsänen
Placopsis cribellans (Nyl.) Räsänen
Placopsis cribellans (Nyl.) Räsänen
Placopsis cribellans (Nyl.) Räsänen
Placopsis cribellans (Nyl.) Räsänen
Placopsis cribellans (Nyl.) Räsänen
Placopsis cribellans (Nyl.) Räsänen
Placopsis cribellans (Nyl.) Räsänen
Placopsis cribellans (Nyl.) Räsänen
Historic biostatus
Collections
Metadata
f1afbb11-558f-45aa-ba1e-d97cf0fe2e57
scientific name
Names_Plants
1 January 2000
11 October 2013