Flora of New Zealand Series

=Lecanora limosescens Zahlbr., Denkschr. Akad. Wiss. Wien math.-naturwiss. Kl. 104: 343 (1941).

Lecanora limosescens. Lectotype: New Zealand. Otago Heads near Dunedin on coastal rocks, 12.ix.1933, J.S. Thomson T 1020 [ZA 3940] – W [fide Lumbsch (1994: 130)]. Isolectotypes – CHR 241776, OTA 029838.

Description : Flora (1985: 213–214 – as Lecanora campestris). See also Lumbsch (1994: 130–131).

Chemistry : Thallus and apothecial margin K+ yellow, C−, KC−, Pd+ yellow-orange; containing atranorin and 2'- O -methylperlatolic acid (major) and chloroatranorin, ±2'- O -methylhyperperlatolic, 2'- O -methylisohyperlatolic, and 2'- O -methylsuperperlatolic acids (Guderley 1999: 223).

N: Northland (Pandora, Kawerua, Warkworth, Great Barrier I.), South Auckland (Whale I.). S: Nelson (Kaihoka Lakes), Canterbury (Mt Palm, Lowry Peaks Ra., Monument, Banks Peninsula, Bankside Reserve, Canterbury Plains, upper Rakaia River, Burke's Pass, Benmore Dam), Otago (Bold Peak, Kinloch, Alexandra, Lake Hayes, Otago Heads). On inland schist and greywacke rocks from both lake shores and dry, inland sites, and on coastal rocks. Known also from the Northern Hemisphere, from Mexico, Central and South America, Japan, Cape Verde Is, South Africa, East Africa, Oceania and Australia (Brodo 1984a; Miyawaki 1988; Lumbsch 1994; Guderley 1999; Becker 2002; McCarthy 2003c, 2006; Nimis & Martellos 2003; Lumbsch & Elix 2004; Ryan et al. 2004b: 260).

Cosmopolitan

Illustrations : Brodo (1984a: 72, fig. 5); Lumbsch (1994: 126, fig. 66E, F; 129, fig. 67A–F); Guderley (1999: 218, fig. 21F); Ryan et al. (2004b: 260, fig. 43).

Lecanora pseudistera is characterised by: the saxicolous habit; the thick, tartareous, white thalline crust; and the clustered, red-brown, epruinose apothecial discs; ampithecium with large crystals not dissolving in K (pulicaris -type); a reddish brown epithecium without crystals, the pigment not fading in K (glabrata -type); and ellipsoidal ascospores 8.5–13.5 × 5.7.5 μm (Lumbsch 1994: 130–132).