Flora of New Zealand Series

≡Lecidea congregans Zahlbr., Denkschr. Akad. Wiss. Wien math.-naturwiss. Kl. 104: 305 (1941).

≡Phyllopsora congregans (Zahlbr.) D.J.Galloway, N. Z. J. Bot. 21: 196 (1983).

Lectotype: New Zealand. Otago, Mt Cargill, on rotten logs, c. 400 m, v.1935, J.S. Thomson T2087 [A96] – W 3424 [fide Galloway (1985a: 390)]. Isolectotypes – CHR, OTA 30303.

Description : Flora (1985: 390 – as Phyllopsora congregans).

N: South Auckland (Hunua Ra., Mamaku), Gisborne, (Lake Waikaremoana), Taranaki (N Egmont) to Wellington. S: Nelson (Mt Aorere, St Arnaud Ra., Mt Zetland, Flora Saddle, Maruia Springs), Marlborough (Mt Stokes, Mt Furneaux), Canterbury (Arthur's Pass, Boyle River), Otago (Dart Valley, Rees Valley, Mt Cargill, Catlins), Southland (Grebe Valley). St: On rotting logs and decaying stumps in humid, low-light habitats; often found on decaying stumps in Nothofagus forests. Known also from New South Wales, Tasmania, Chile, and Argentina. (Kantvilas 1994b; Filson 1996; Kantvilas & Jarman 1999; McCarthy 2003c, 2006).

Austral

Exsiccati : Vězda (1997e: No. 309).

Illustrations : Malcolm & Galloway (1997: 110); Kantvilas & Jarman (1999: 148); Malcolm & Malcolm (2000: 6); Lumbsch et al. (2001: 28); McCarthy & Malcolm (2004: 60).

Trapeliopsis congregans is characterised by: the corticolous habit; the greenish, squamulose, microphylline thallus and the prominent, often confluent, rust-red or red-brown, confluent, conglomerate apothecia, which make a vivid contrast to the greenish thallus.