Flora of New Zealand Series

=Pertusaria basaltica Zahlbr., Denkschr. Akad. Wiss. Wien math.-naturwiss. Kl. 104 : 333 (1941). 

Holotype: New Zealand. "On columnar basalt, Dunedin, Otago, Oct. 1861, Dr. L. Lindsay. – H-NYL 23571. Isotype: New Zealand. Otago, Green Island Bluff [= Black Head], on columnar basalt, x.1861, W.L. Lindsay – E [Lauder Lindsay's personal herbarium material (E) was erroneously chosen as lectotype for this name (Galloway 1985a: 379), whereas the H-NYL specimen annotated by Nylander is correctly holotype].

Pertusaria basaltica. Holotype: New Zealand. Otago, Black Head near Dunedin. On coastal rock, xii.1933, J.S. Thomson ZA 253 – W, Isotype – CHR 374717.

Description : Flora (1985: 378–379).

Chemistry : K+ yellow→red, C−, KC+ red, Pd+ orange; containing norstictic and connorstictic acids with or without traces of methyl pseudonorstictate, atranorin, salazinic and stictic acids (Messuti & Archer 1999).

N: S: Lowland coastal on rock, still very poorly collected and understood in New Zealand. Known also from Kerguelen, Marion I. and the Falkland Is (Messuti & Archer 1999: 212; Øvstedal & Gremmen 2001).

Austral

Illustration : Messuti & Archer (1999: 209, fig. 6).

Pertusaria perrimosa is characterised by: the saxicolous (coastal rocks) habit; the grey-white to dingy olivaceous-grey, thick, areolate thallus; verruciform apothecia with 1–4 black ostioles per verruca; 8-spored asci; biseriate ascospores (100–125 × 40–60 μm); and norstictic acid.