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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. Taxonomic rank: species. Cladonia. Cladoniaceae Zenker (1827).

Taxonomic Literature: Taxonomic notes: intergrades with C. umbricola on one hand and C. bellidiflora on the other. Brodo I.M. & Ahti T., Can. J. Bot. 74: 1147-1180 (1996).

Ecology: Lignicolous (conifer bark or wood,especially logs) or corticolous; growing sun-exposed, partially shaded, or fully shaded.

Thallus: Crustose, squamulose; lobes ascending or horizontal; branches densely aggregated, scattered, loosely aggregated, or clustered; separate thallus parts 2-7 mm long; 1-5 mm wide. Primary Thallus: Persistent. Secondary Thallus: Present, arising from center of the primary thallus or arising from edge of the primary thallus (more commonly), of determinate growth; stipe 15-40 mm high, .8-2.5 mm wide, lime green, homogeneously coloured, corticate (but breaking down into squamules and soredia), with intact or longitudinally split wall, 30-70 µm thick. Thallus Outline: Margin dissected. Upper Surface: Lime green (often maculated); not sorediate. Lower Surface: White, yellow, or orange (at the dying base).

Ascocarps: Forming along the margin of scyphi, moderately abundant, .5-3 mm in diam.. Disk: Plane to strongly convex; red.

Secondary Metabolites: Thamnolic acid (with decarboxythamnolic acid) and usnic acid, of the following substance class(es): ß-orcinol depsides.

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

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