Thelidium calcareum (C.Knight) Hellb.
Verrucaria calcarea Knight, T.N.Z.I. (Bot.) 15: 356 (1883).
V. calcicola Nyl., Lich. N.Z.: 127 (1888).
Holotype: New Zealand, Sine loco. Charles Knight, WELT. Isotype in BM!
Verrucaria calcicola. Type: New Zealand. Sine loco. Charles Knight, H-NYL - not seen.
Thallus dark olivaceous to blackish-brown, thin, irregularly spreading, effuse or wanting, often rather abraded, saxicolous. Perithecia black, minute, to 0.25 mm diam., sessile, convex, ostiole simple, minute, excipulum black. Ascospores 1-septate, colourless 14-18 × 7-9 µm.
N: South Auckland (Pio Pio) to Wellington. S: Canterbury (Weka Pass, Castle Hill, Mt Somers), Otago (Maheno, Oamaru), Southland (Clifden). On limestone rocks, often giving a rather greyish colour to stone; widespread.
Endemic
