Caloplaca decipiens (Arnold) Blomb. & Forssell
Physcia decipiens Arnold, Flora 50: 562 (1867).
Thallus subsquamulose, radiate effigurate, rosette-forming to somewhat confluent 1-2(-3) cm diam., orange-yellow or lemon-yellow, often dark yellow-brown centrally, pruinose, sorediate, K+ purple, saxicolous. Lobes convex, contiguous, to 5 mm long and 0.25-0.5 mm wide, apices broader, incised-crenate or palmate, ± plicate-radiate, centrally cracked-lobulate to verrucose, soralia round or confluent, mainly central, soredia granular, delicate, orange-yellow. Apothecia not seen in New Zealand material. Chemistry: Emodin, parietin, xanthorin, fallacinal.
S: Canterbury, Weka Pass. On limestone rocks, rather rare.
Cosmopolitan
