Flora of New Zealand Series

=Bagliettoa ocellata C.Knight, Trans. N. Z. Inst. 8: 328 (1876). Trans. Linn. Soc. ser. 2, Bot. 1: 279 (1877).

≡Pertusaria ocellata (C.Knight) Müll.Arg., Bull. Herb. Boissier 2, App. 1: 55 (1894) non Körber.

Holotype: New Zealand. Sine loco [probably Wellington], Charles Knight – H-NYL 23008.

Bagliettoa ocellata. Lectotype: New Zealand. Sine loco [probably Wellington], Charles Knight – H-NYL 23008.

Description : Flora (1985: 374).

Chemistry : K+ yellow→red, C−, KC+ red, Pd+ orange; containing norstictic and connorstictic acids.

N: Wellington. Known only from the type collection

Endemic

Illustrations : Knight (1876: pl. X, fig. 23; 1877: pl. XXXVII, fig. 23 – as Bagliettoa ocellata).

Pertusaria erumpescens is characterised by: the saxicolous habit; the brownish-grey rather indeterminate thallus; fawn or brownish, shining fertile verrucae with minute, black ostioles; 8-spored asci; uniseriate to biseriate ascospores, 34–42.5 × 12–17 μm; and the presence of norstictic acid in the medulla.