Flora of New Zealand Series

≡Parmelia subflava Taylor, Lond. J. Bot. 6: 147 (1847).

=Cetraria corallophora Müll.Arg., Bull. Soc. Roy. Bot. Belg. 31 (2): 26 (1892).

=Parmelia rutidota var. vestita Zahlbr., Denkschr. Akad. Wiss. Wien math.-naturwiss. Kl. 104: 355 (1941).

=Punctelia rudecta auct. non (Ach.) Krog [Galloway & Elix 1983; Galloway 1985a]. 

Cetraria corallophora. Holotype: New Zealand. Sine loco, 1843–4. W. Stephenson – BM.

Parmelia rutidota var. vestita. Lectotype: New Zealand. Southand, Otakou Bush near mouth of Oreti River, 22.vii.1933. J.S. Thomson ZA 210 – CHR 241858 [fide Galloway & Elix (1983: 404)].

Description : Flora (1985: 485–486 – as Punctelia rudecta).

Chemistry : Cortex K+ yellow; medulla K−, C+ red, KC+ red, Pd−; containing ±atranorin, ±chloroatranorin and lecanoric acid (major).

N: South Auckland (Coromandel Peninsula), Wellington (National Park), Hawke's Bay (Napier, Akitio). S: Banks Peninsula to Southland, mainly coastal and lowland, extending inland E of the Main Divide to Peel Forest and the Hunter, Matukituki and Dart valleys. A: (Enderby I.). On decorticated wood (fence posts etc.), bark and rock, s.l. to 1000 m. Also in S and E Australia (Elix 1994q: 167; McCarthy 2003c, 2006).

Australasian

Illustrations : Galloway & Elix (1983: 404, fig. 9); Elix 1994q: 166, fig. 57C).

Punctelia subflava is characterised by: the corticolous/saxicolous habit; the dorsiventral, lobulate isidia; relatively sparse pseudocyphellae on lobe margins and thalline exciple of apothecia; the pale lower surface; and lecanoric acid as major medullary constituent. It is distinguished from P. novozelandica by the pale lower surface.