Flora of New Zealand Series

Lecanora cribellans Nyl., Lich. Jap.: 42 (1890).

Thallus determinate, effigurate, lobate at margins, forming ± orbicular and often confluent patches, to 6 cm diam., prothallus absent. Marginal lobes closely attached, flattened, simple or irregularly branched, usually richly divided and markedly crenulate, discrete, separated by narrow cracks, with rounded or subcrenulate ends. Upper surface creamish or whitish to pale olive-brown, matt, epruinose, without soredia, centrally cracked or indistinctly areolate, pitted-punctate with minute pock-like depressions resulting from abrasion of isidia. Isidia terete, simple, 0.1 mm diam., subglobose, often crowded centrally. Cephalodia sessile, scattered, flattened orbicular, or depressed convex, 0.8-5.0 mm diam., radially folded and wrinkled or cracked, yellowish-brown or pinkish, matt. Apothecia scattered, rotund, subpedicellate 0.5-1.5 mm diam., thalline margin prominent, entire or subcrenulate, proper margin thin, flesh-coloured, disc plane or subconvex, pale pink to dark red or brownish matt, white pruinose. Hymenium 90-150(-180) µm tall, pale yellowish. Hypothecium colourless. Ascospores ellipsoid 12-16.5 × 6-9 µm. Pycnidia immersed, forming minute swellings with punctiform brownish ostioles. Conidia filiform, slightly curved, 21-29 × 0.5 µm. Chemistry: Cortex K+ yellowish, C+ rose; medulla K+ yellow (faint), C+ rose, Pd-.

N: Auckland, Wellington. S: Canterbury (Lewis Pass, Cass, Mt Misery, Arthur's Pass, Banks Peninsula), Southland (Fiordland). St: On rocks and stones, rarely on sandy soil. Still rather poorly collected in New Zealand but common in alpine or subalpine areas east and west of the Main Divide.

Circum-Pacific