You are here
All Fungi
Pseudocyphellaria citrina
Nomenclature
-
Family: PeltigeraceaeGenus: Pseudocyphellaria
SUMMARY
Thallus 2–3 (–10) cm diam., at first rosette-forming, soon irregularly spreading; lobes 5–15 mm broad, rounded or elongate, indented at the apices, often discrete at the margins and overlapping centrally; upper surface pale grey-brown (in shade) to dark red-brown, smooth or with a ± coarse ridged network from which yellow soralia are derived, at first punctiform, later becoming confluent; medulla white; lower surface pale brown, darker brown towards the centre, tomentose to the margins, with frequent conspicuous yellow pseudocyphellae; photobiont blue-green.
Teleomorph: apothecia very rare, disc 1–2 mm diam., dark red-brown, margin thin, pale reddish brown, often wrinkled. Ascospores (18–) 22–30 × 5–9 (–12) μm, 1(-3)-septate, fusiform, brown. Medulla and soralia C–, K+ yellow, KC–, Pd+ orange, UV± dull orange (pulvinic, stictic and constictic acids, pulvinic lactone, calycin, tenuiorin, methylgyrophorate and hopane-6α,7β,22-triol, norstictic acid in the apothecia).
Information taken from Revisions of British and Irish Lichens vol. 20 (2021).