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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 25. Siphula. Genus of unknown placement (incertae sedis); of unknown placement (incertae sedis).

Taxonomic Literature: Galloway D.J., Flora of New Zealand Lichens: i-lxxiii, 1-662 [522-
526], Wellington (1985); Mathey A., Nova Hedwigia 22: 795-878 (1974);
Poelt J., Bestimmungsschlüssel Europäischer Flechten: 1-757
[609] (1969); Purvis O.W. in: Purvis O.W. et al. (eds), The Lichen
Flora of Great Britain and Ireland, London (1992).

Biogeography: Checklist records: Bolivia, Great Britain, Guianas, New Zealand, Sweden and Norway, United States and Canada (continental), and Republic of South Africa.

Lichen Photobionts: Primary photobiont present; chlorococcal. Secondary photobiont absent.

Thallus: Foliose, crustose, or fruticose, not subdivided parts, subfruticose or granular, lobed. Thallus Outline: Soon disappearing. Upper Surface: Grey, green, white, brownish yellow, or pink (rosé); special structures absent. Lower Surface: Attached by holdfasts; special structures present:; not pseudocyphellate; not cyphellate; rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Secondary Metabolites: Present, of the following substance class(es): ß-orcinol depsides and dibenzofurans [and usnic acids].

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