Hyperphyscia plinthiza (Nyl.) Müll.Arg.
Physcia plinthiza Nyl., J. Linn. Soc. Lond. Bot. 9: 249 (1866).
P. synthalea Knight, T.N.Z.I. 16: 401 (1884).
Rinodina macra Zahlbr., Denkschr. Akad. Wiss. Wien math.-naturwiss. Kl. 104: 377 (1941).
Lectotype: New Zealand, Otago, Dunedin, 1861. W. Lauder Lindsay, H-NYL!
Physcia synthalea. Lectotype: New Zealand. Sine loco (prob. Wellington). Charles Knight, WELT!
Rinodina macra. Holotype: New Zealand. Otago, Waironga near Dunedin, on Populus nigra. J.S. Thomson W51, W!
Thallus lobate, orbicular to spreading 5-12 cm diam., closely attached, corticolous. Lobes densely plicate-rugose centrally, imbricate at margins, margins entire, rounded, overlapping. Upper surface greyish-fawn or dirty greenish-grey, matt, scabrid or subpruinose in parts, wrinkled, often densely plicate. Lower surface pale or brown, rhizinate. Rhizines sparse, pale or brown. Apothecia frequent, sessile, constricted at base, scattered or densely crowded, rounded or contorted by mutual pressure, disc dark brown, concave at first becoming plane or subconvex with age, epruinose, margins thick, persistent, entire often ± crenulate, concolorous with thallus. Ascospores biseriate, ellipsoid or oblong, apices rounded, straight or slightly curved, 3-6(-8)-septate, (20-)27-44 × 11-24 µm.
N: Wellington (sine loco: specimens of Physcia synthalea WELT). S: Canterbury (Banks Peninsula to Arowhenua Bush), Otago (Dunedin, Taieri Plains), Southland (Waihopai Bush). Mainly coastal in eastern South I., localities on the bark of native trees and shrubs (Hoheria, Sophora etc).
Endemic
