Psoroma contortum Müll.Arg.
Details
Psoroma contortum Müll.Arg., Miss. Sci. Cape Horn, Bot., 5 (1889)
Nomenclature
Müll.Arg.
Müll.Arg.
1889
5
ICN
Psoroma contortum Müll.Arg.
species
Psoroma contortum
Classification
Descriptions
Psoroma contortum Müll.Arg.
Thallus foliose-laciniate, lobate, closely attached, 3-8(-15) cm diam. Lobes undulate, uneven or ± flat, 2-3 mm wide, short and rounded to elongate, 8-15 mm long, incised at margins, contiguous, imbricate centrally, margins entire or variously incised or notched, slightly thickened below, wavy, subascendent at apices, often ± lobulate. Upper surface bright lettuce-green when wet, pale green or grey-green on storage, thin (not as thick as in ), uneven, smooth, shining in parts, roughened, wrinkled, minutely papillate- uneven in others, epruinose, without tomentum. Cephalodia on lower surface, sparse, small, globose, becoming glomerulate, dark brownish or pale buff. Lower surface pale whitish or buff, moderately to densely tomentose, tomentum pale buff, with simple to squarrose, whitish rhizines when growing on bark, or with thick brown-black rhizines when growing on moss. Apothecia frequent, central, often crowded-contorted, 1-5 mm diam., round to irregular, disc very uneven, ± plane to convex, pale red-brown, white-pruinose, conspicuously gyrose-etched or contorted, with conspicuous concentric ridges, often centrally fissured, rarely with thalline lobules, margins shining, crenulate-striate, concolorous with thallus. Ascospores globose 14-18 µm diam.
Taxonomic concepts
Notes
editorial
New Zealand material earlier designated Psoroma contortum Müll.Arg. probably refers to P. aff. pallida, or may in fact represent an undescribed taxon
Metadata
eed10093-7e84-4745-8508-b9dc46bcb9da
scientific name
Names_Plants
1 January 2000
12 June 2019