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Lichens A-Pac (2007) - Flora of New Zealand Lichens - Revised Second Edition A-Pac
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Candelariella Müll.Arg.

CANDELARIELLA Müll.Arg., 1894

Type : Candelariella vitellina (Ehrh.) Müll.Arg. [=Lichen vitellinus Ehrh.]

Description : Flora (1985: 72).

Key

1
Asci polysporous
2
Asci 8-spored
4
2
Thallus granular-verrucose or ±subsquamulose
3
Thallus farinose-leprose
xanthostigma
3
Thallus bright golden-yellow, ±continuous, uniform or coarsely cracked, of contiguous, coarse, compact coralloid granules, older areolae very dense and almost fruticose
coralliza
Thallus dull yellow-orange, of scattered to compacted, ±flattened, somewhat extended granules in small, discrete to contiguous clusters
vitellina
4
Corticolous (nutrient-enriched trees)
5
Saxicolous (basic rocks, concrete or cement); soredia absent
aurella
5
Soredia present, arising from margins of minute, ±flattened, ±crenate granules
reflexa
Soredia absent
subdeflexa

Candelariella is a cosmopolitan genus of some 45 species (Kirk et al. 2001), well developed in polar and cold temperate regions, and included in the family Lecanoraceae (Eriksson et al. 2004; Pennycook & Galloway 2004; Eriksson 2005). Species are characterised by the production of pulvinic acid derivatives giving thalli a characteristic yellow colour that is K−; by Candelaria -type asci; and a preference for nitrogen-rich susbstrata. The genus is discussed by Hakulinen (1954); James (1971); Thomson (1973); Harris & Buck (1978); Filson (1992a); James & Gilbert (1992); Tønsberg (1992); Nimis (1993) and Westberg (2004). Antarctic taxa are discussed by Castello & Nimis (1994) and Øvstedal & Lewis Smith (2001: 149–151). Galloway & Hafellner (2002) recently reported C. subdeflexa from southern New Zealand. Six species are here recorded from New Zealand.

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