Psoromidium aleuroides (Stirt.) D.J.Galloway
Lecidea aleuroides Stirton, J. Linn. Soc. Lond. Bot. 14: 469 (1875).
Psoromidium wellingtonii Stirton, Proc. phil. Soc. Glasg. 10: 304 (1877).
Psoroma descendens Nyl., Lich. N.Z.: 54 (1888).
Coccocarpia fineranii Dodge, Nova Hedwigia 19: 465 (1971).
Lectotype: New Zealand. Near Wellington. J. Buchanan 141, GLAM!
P. wellingtonii. Lectotype: New Zealand. Near Wellington. J. Buchanan, BM!
Psoroma descendens. Lectotype: New Zealand. Sine loco (prob. Wellington). Charles Knight, H-NYL 30799!
Coccocarpia fineranii. Holotype: New Zealand. Auckland I., Laurie Harbour, on rata trunk, 27 January, 1966. B.A. Fineran 1752, Herb. Dodge!
Thallus small-squamulose, to 10 cm diam. Squamules small, rounded, 0.5-2.0 mm diam., crowded, imbricate to ± suberect, margins shallowly to deeply crenate, bright lettuce-green to pale greenish-grey, turning brownish-buff on storage, matt, with paler margins, forming an areolate crust on a thick, black, byssoid prothallus, discrete and scattered near margins. Cephalodia rosette- shaped, placodioid, flattened, pale blue-grey, 1-3 mm diam., at margins of squamules or on prothallus. Apothecia numerous, sessile, often aggregated and ± confluent, 0.4-1.0 mm diam., dark red-brown, matt, with a thin, pale margin, at first, soon becoming convex and immarginate. Asci clavate to ellipsoid, 70-75 µm long. Paraphyses slender, apices not thickened, simple, sometimes dichotomously branching above asci. Ascospores ellipsoid or elongate-ellipsoid to broadly fusiform, rounded or bluntly apiculate at ends, 10-13.5(-15) × 4-6 µm, wall slightly scabrid, c. 1 µm thick.
N: Auckland (Rangitoto I.) to Wellington. S: Nelson (Maruia Valley) to Fiordland (Secretary I.). St: (Glory Cove). A: Mainly corticolous (Fuchsia, Griselinia, Metrosideros, Nothofagus, Podocarpus and Weinmannia) rarely on soil (ignimbrite NE of Taupo), subalpine in mainly undisturbed forest habitats.
Australasian
