Flora of New Zealand Series

≡Parmelia horrescens Taylor in J.T. Mackay, Fl. Hibern. 2: 144 (1836).

≡Parmelina horrescens (Taylor) Hale, Phytologia 28: 482 (1974).

Descriptions : Flora (1985: 351 – as Parmelina horrescens). See also Elix (1994o: 134).

Chemistry : Cortex K+ yellow; medulla K−, C−, KC+ rose or red, Pd−; containing atranorin, chloroatranorin, 3-methoxy-2,4-di- O -methylgyrophoric acid (major), gyrophoric acid (tr.) and 4–5-di- O -methylhiascic acid (tr.).

N: Northland to South Auckland (King Country). On trees and shrubs, still rather rarely collected. Known also from Europe, Africa, North and South America, Thailand, Papua New Guinea and Australia (Elix 1994o; Louwhoff & Elix 2002b; Nash & Elix 2002f; Wolseley et al. 2002; Aptroot 2002e; McCarthy 2003c, 2006; Nimis & Martellos 2003).

Cosmopolitan

Illustrations : Hale (1976b: 29, fig. 14f – as Parmelina horrescens); Elix (1994o: 133, fig. 53B); Brodo et al. (2001: 487, pl. 567); Louwhoff & Elix (2002b: 130, fig. 70); Dobson (2005: 307).

Parmelinopsis horrescens is characterised by: the corticolous habit; the presence of cylindrical or coralloid–lobulate isidia that become ciliate at their apices; and by the medullary chemistry (see Elix & Wardlaw 2000).