Parmelia signifera Nyl.
Details
Parmelia signifera Nyl.
Nomenclature
Nyl.
Nyl.
1888
25
ICN
Parmelia signifera Nyl.
species
Parmelia signifera
Classification
Subordinates
Descriptions
Parmelia signifera Nyl.
Thallus thick, coriaceous, orbicular to spreading, to 10 cm diam., closely to loosely attached, saxicolous or terricolous. Lobes narrow (5-10 mm wide), relatively short (to 25 mm long), often forming secondary, imbricate, clustered, ascending lobules centrally, margins entire to ± phyllidiate or lacerate, incised at apices, sinuous, often black and shining. Upper surface smooth, often wrinkled-convolute at centre, leathery, brownish-grey or reddish-brown or blackened, olive greenish-brown to red-brown at margins and there conspicuously white-maculate, mottled, pseudocyphellae evident towards lobe margins, sigmoid or forming a cracked reticulum of white lines in older parts. Lower surface smooth, black, moderately rhizinate. Rhizines black, simple or branched. Apothecia rare, subpedicellate, to 8 mm diam., disc red-brown, matt, plane or concave, imperforate, margins entire at first, becoming fissured with age, thalline exciple strongly maculate-cracked, pseudocyphellate. Ascospores ellipsoid, 10-14 × 7-8 µm. Chemistry: Cortex K+ yellow; medulla K+ yellow → red, C-, KC+ red, Pd+ orange. Salazinic acid and atranorin.
Taxonomic concepts
Parmelia signifera Nyl.
Parmelia signifera Nyl.
Collections
Metadata
23a70ac6-5f2d-411a-a863-e4c9f8329bcd
scientific name
Names_Plants
1 January 2000
5 May 2016