Flora of New Zealand Series

Holotype: New Zealand. Nelson, Golden Bay County, north-west Nelson, Kaihoka Lakes, 40º31's, 172º36'E, s.l., 13.xii.1982, J.K. Bartlett 22268 – AK 192257.

Description : Thallus pale olive-green to whitish or creamish, thick, somewhat cracked, surface smooth and shining, without isidia or soredia. Apothecia verruciform, only very shallowly lumpy or somewhat wrinkled, inconspicuous, often only indicated by the grey-black ostiole, very flattened-hemispherical or immersed, concolorous with thallus, 0.6–1 mm diam.; ostioles inconspicuous, grey to grey-black, translucent, 1–2 per verruca, 0.2–0.4 mm diam. Ascospores 2 per ascus (rarely 3 per ascus), ellipsoidal, smooth, 210–250(–300) × 50–75 μm.

Chemistry : TLC−, all reactions negative.

S: Nelson (Kaihoka Lakes; Tasman Mts, Lake Cobb; Arthur Ra.). On bark. Still rather poorly collected. Sometimes growing with Coccotrema cucurbitula.

Endemic

Illustrations : Archer & Elix (1994a: 205, fig. 3); Malcolm & Galloway (1997: 31, 103); Malcolm & Malcolm (2000: 57).

Pertusaria hadrospora is characterised by: the corticolous habit; the inconspicuous verrucae; and asci with 2 (rarely 3) large ascospores.