Flora of New Zealand Series

Lectotype: New Zealand. Sine loco. Charles Knight, 1867 H-NYL 30378.

Thallus foliose lobate, ± rosette-forming, closely attached, to 23 cm diam., corticolous. Lobes narrow, contiguous at margins, imbricate, coalescing centrally, ± stellate-radiating or fan-shaped. Upper surface dull plumbeous-grey, smooth to uneven, faintly maculate (×10 lens), often with granular lobules. Apothecia sessile, rounded, 0.2-1 mm diam., disc red-brown, waxy or matt, flat, with a pale proper margin, bounded by a thick, crenulate-striate thalline margin. Ascospores ellipsoid, 11-13 × 5-8 µm.

N: North Auckland (Pandora) to Auckland (Rangitoto I., Great Mercury I., Hunua Ranges). Mainly coastal on trees and shrubs. Often on bark of Metrosideros excelsa (Pohutukawa) and commonly associating with the lichens: Coccocarpia erythroxyli, Leioderma pycnophorum, Pseudocyphellaria aurata and Usnea rubicunda.

Endemic