Lecanactis subfarinosa (C.Knight) Hellb.
Lecidea subfarinosa Knight, T.N.Z.I. 8: 319 (1876).
Platygrapha myriommata Knight, T.N.Z.I. 12: 337 (1880).
L. subfarinosa var. minor Zahlbr., Denkschr. Akad. Wiss. Wien math.-naturwiss. Kl. 104: 261 (1941).
Holotype: New Zealand. Sine loco. (prob. Wellington). Charles Knight No. 13, 2.1.76, WELT - Herb. Knight, Vol. 45A, p. 3!
Platygrapha myriommata. Type: New Zealand. Sine loco. Charles Knight, WELT - not seen.
L. subfarinosa var. minor. Type: New Zealand. North Auckland, Mahurangi River, on Avicennia resinifera, L.B. Moore 126 W - not seen.
Thallus white, effuse, or minutely granular-verrucose, ± areolate-cracked, matt or shining, wrinkled, corticolous. Apothecia 0.3-0.8 mm diam., white-pruinose, black beneath pruina, rounded to deformed, sessile, constricted at base, thinly marginate, margin often flexuose. Ascospores 4-6-septate, acicular-fusiform, 21-34(-40) × 3.5-5 µm. Chemistry: ± lepraric acid, ± schizopeltic acid.
N: Northland (Mahurangi River) to Wellington. Coastal on trees and shrubs, often on Avicennia bark in northern localities.
Endemic
On living or dead bark in shaded or exposed habitats, often with Chrysothix candelaris.
