Flora of New Zealand Series

≡Psoroma durietzii P.James & Henssen, Lichenologist 7 (2): 143 (1975).

Holotype: New Zealand. Westland, South Hokitika Experimental Station, on Weinmannia racemosa. 1927, G. Einar and Greta Du Rietz 1570c – OTA; isotype – BM.

Description : Flora (1985: 473 – as Psoroma durietzii).

Chemistry : K± yellow, C−, KC± yellow, Pd± red; containing pannarin, zeorin and two unidentified pigments. Unpublished results show that the chemistry is more complex and several chemodemes may be present with porphyrilic acid and triterpenoids (Elvebakk & Galloway 2003).

N: Wellington (Kaimanawa Ra., Ruahine Ra., Tararua Ra., Rimutaka Ra.). S: Nelson (St Arnaud Ra., West Bay, Lake Rotoiti), Westland (Stillwater, Haast), Canterbury (Lewis Pass, Arthur's Pass, Governor's Bush), Otago (Haast Pass, Lake Hawea, Olivine Valley, Routeburn Valley), Southland (Milford Sound, Cascade Cove, Dusky Sound, Lake Te Anau, Lake Manapouri, Wilmot Pass). St: (Butterfield's Beach, Glory Cove, Port Pegasus). A: (Laurie Harbour, Ranui Cove, Terror Cove, Rose I., Ewing I., Enderby I.). C: (Mt Lyall, Mt Dumas, Mt Honey). On Dacrycarpus, Kunzea, Leptospermum, Nothofagus, Phyllocladus and several other trees and shrubs in high-humidity habitats, s.l. to 1000 m. Known also from SE Australia, Tasmania and southern Chile (Jørgensen & Galloway 1992b: 281; Galloway & Quilhot 1999).

Austral

Illustrations : James & Henssen (1975: pl. 1A–G – as Psoroma durietzii); Jørgensen & Galloway (1992b: 283, fig. 97A – as Psoroma durietzii); Kantvilas & Jarman (1999: 127, 128 – as Psoroma durietzii); Purvis (2000: 59 – as Psoroma durietzii).

Pannaria durietzii is characterised by: the corticolous habit; the long, marginal lobes; very characteristic, placodioid to subfoliose cephalodia developing numerous bluish soralia; and a secondary chemistry dominated by pannarin. It has a green alga as major photobiont.