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Data Set Maintenance: Data set standard item. Data set author(s): Nash T.H. (00-01-31). Data set reviewer(s): Nash T.H.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Hypotrachyna. Synonyms: Parmelia brevirhiza Kurokawa; Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Biogeography: Pantropical and neotropical; upper montane and subalpine. Continent: Africa, Australasia, Northern America, Southern America, and Pacific. Checklist records: Australia, Mexico, Sonoran Desert, and Venezuela.

Thallus: Foliose, subdivided into main parts, irregular, dispersed throughout and distinctly seperate, lobed; lobes elongate, horizontal; plane; branches bifacial. Thallus Size and Differentiation: 2-4-6 cm in diameter; main branches basally not constricted; apex rounded. Upper Surface: Grey, plane or subconvex, matt, smooth; not fissurate; not foveate; not convoluted; immaculate; without patches; pruinose, pruina scarce; not pseudocyphellate; not wrinkled; eciliate; without hairs; not isidate; without isidiomorphs; not papillate, not pustulate; sorediate; not tuberculate. Lower Surface: Grey, black in the centre, dark brown along the margin; attached by holdfasts; not cyphellate; not wrinkled; rhizinate; rhizines sparse, black, branched, dichotomously branched; not tuberculate.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, forming in the thallus centre, sparse. Margin: Smooth, epruinose; not sorediate; without pseudocyphellae pseudocyphellae; not ciliate; not hirsute. Disk: Brown.

Secondary Metabolites: Only in the upper part of the cortex or throughout the thallus medulla, consalazinic acid, norstictic acid, and salazinic acid.

Spot Tests: Cortex: KC + deep yellow; medulla: K + yellow changing to red, C –, KC –, PD + red.

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