Flora of New Zealand Series

Lecanora thiomela Nyl., Flora 48: 338 (1865).

Thallus sulphur-yellow to green-yellow, granular, continuous, rimose-areolate, prothallus blackish, saxicolous. Apothecia cryptolecanorine to lecanorine, innate to adnate or sessile, scattered or frequent and contiguous, to 0.5 mm diam., disc brown-black or black, concave to plane, margins entire, concolorous with thallus. Hymenium 120-150 µm tall, upper parts inspersed. Epihymenium red-brown, with a fine, granular epipsamma. Hypothecium colourless. Ascospores of Pachysporaria -type, asci often only with with 4-6 spores, torus very thinly developed, 20-34 × 11-17 µm. Chemistry: Zeorin, O-methyl- dichlornorlichexanthone.

N: Auckland to Wellington. S: Nelson to Southland, both east and west of Main Divide, coastal rocks or inland on rocks in open grassland. Lectotype: New Zealand. Otago, Dunedin on basaltic rocks. W.L. Lindsay. E!

Australasian