Rinodina nigricans H.Mayrhofer
* Account prepared by Dr H. Mayrhofer (Graz).
Holotype: New Zealand. Canterbury, Weka Pass, c. 250 m, 172°43' E, 43° S. On limestone in disused railway cutting, 10 September, 1981. H. Mayrhofer, T. Ahti and L. Brako, 2329, GZU.
Thallus dark grey-brown to blackish-brown, granular to warted or rimose- areolate, sometimes growing above other crusts, cortex K+ purple-violet, without perceptible prothallus, saxicolous. Apothecia lecanorine, adnate to sessile, dispersed or sometimes contiguous, to 0.6 mm diam., disc plane, blackish. Hymenium 80-100 µm tall. Epihymenium blue-green, K+ purple-violet. Hypothecium colourless. Ascospores of Bicincta -type, 15-19 × 8-11 µm, wall finely warted. Chemistry: -.
S: Canterbury (Castle Hill Basin, Weka Pass, Milford). On limestone.
Endemic
