Flora of New Zealand Series

Psora bischoffii Hepp, Flecht. eur.: 81 (1853).

Thallus evanescent, pale grey, of discrete, scurfy granules, or rarely thin, rimose, grey to grey-brown, saxicolous. Apothecia lecanorine, sessile, sometimes contiguous, to 1 mm diam., disc black, plane becoming convex, margins concolorous with thallus or disc, entire, becoming excluded at maturity. Hymenium 100-130 µm tall, inspersed with oil drops. Epihymenium brownish. Hypothecium colourless. Ascospores of Bischoffii -type, 15-21 × 9-13 µm. Chemistry: -.

S: Canterbury (Castle Hill Basin, Weka Pass), Southland (Clifden). On limestone.

Cosmopolitan