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Cladonia borealis S. Stenroos

Data Set Maintenance: Data set standard item. Data set author(s): Brodo I. & Ahti T. (96-12-10). Data set to be published after submission; 96-12-10.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Cladonia. Cladoniaceae Zenker (1827).

Taxonomic Literature: Brodo I.M. & Ahti T., Can. J. Bot. 74: 1147-1180 (1996).

Ecology: Terricolous; growing sun-exposed; substrate non-calciferous.

Thallus: Crustose, squamulose; lobes ascending; branches densely aggregated, scattered, loosely aggregated, or clustered; separate thallus parts 3-10 mm long; 3-10 mm wide. Primary Thallus: Persistent. Secondary Thallus: Present, arising from center of the primary thallus, of determinate growth; stipe 7-20-(40) mm high, lime green, homogeneously coloured, corticate, with intact wall, 20-80 µm thick. Thallus Outline: Margin crenulate. Upper Surface: Areolated (forming rounded or angular cortical "plates"), lime green (greyish to pale greenish yellow (105-104) to yellow green (121); maculate), smooth; not sorediate. Lower Surface: White or brown (-black at base).

Lower Cortex: Absent.

Ascocarps: Forming along the margin of scyphi (on short stipes or proliferations), moderately abundant, 1.5-5 mm in diam.. Disk: Weakly convex to strongly convex; red.

Conidiomata: Formed on margins of scyphi.

Pycnidia: With reddish ostiolar gel.

Secondary Metabolites: Barbatic acid (with 4-O-demethylbarbatic acid) and usnic acid, of the following substance class(es): ß-orcinol depsides.

Spot Tests: Upper surface: K – (negative), C –, + deep yellow, or + orange, PD –.

(report generated 15.Nov.2007)

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