Psoroma pholidotoides (Nyl.) Trevis.
Lecanora sphinctrina var. pholidotoides Nyl., J. Linn. Soc. Lond. Bot. 9: 250 (1866).
Pannaria reticulata Hue, Nouv. Archs Mus. Hist nat. Paris sér. 4, 8: 261 (1906).
Lectotype: New Zealand. Otago, Saddlehill Bush, October 26, 1861. W.L. Lindsay, H-NYL 30773!
Thallus squamulose, closely attached, irregularly spreading 4-8(-10) cm diam. Squamules minute, scattered at margins, 0.5-1.0 mm diam., round to irregular, coalescing centrally into a ± dense, flat, appressed mosaic, often microphylline or sublobulate, often diffract-areolate centrally, ± continuous, convex, plane or concave, jigsaw-like. Prothallus black, byssoid, thick and fibrous or thin, to 5 mm beyond marginal squamules. Upper surface pale greenish or yellow- green, margins not or rarely white-frosted, glossy, waxy, smooth, ± shining, without pruina or tomentum or crystals. Cephalodia infrequent, occasionally larger than squamules, flattened, to 1 mm diam., placodioid, very shallowly wrinkled-plicate, smooth, shining, pale bluish-grey when wet, or in small, flattened globules 0.1 mm wide, occasionally laminal, normally marginal or between squamules, sometimes striate, purplish to brown. Apothecia sessile, round to irregular, 0.5-2.5 mm diam., disc red-brown, matt, not pruinose, convex to plane, sometimes contorted, etched, or confluent-convolute with thalline lobules, margins relatively thick, inflexed, crenulate-striate, wavy, thalline exciple areolate. Ascospores 13-22 × 9-11 µm.
N: S: St: Throughout, common and widespread on bark of trees and shrubs in moderate shade, also on rocks in humid, ± undisturbed habitats, s.l. to 1000 m.
Austral
