Hypotrachyna intercalanda (Vain.) Hale

Hypotrachyna intercalanda

Parmelia intercalanda Vainio, 1890:53. [Type collection: Sitio, Minas Gerais, Brazil, Vainio 899 (TUR, Vainio herbarium number 3014, lectotype; BM, M, UPS, isolectotypes).]

Parmelia fragilis Lynge, 1914, p. 123. [Type collection: Santa Anna da Chapada, Mato Grosso, Brazil, Malme 2365* (S, lectotype).]

Thallus adnate to closely adnate on bark, tannish mineral gray, 3–6 cm broad; lobes sublinear, crowded to separate, 0.5–2 mm wide; upper surface plane to rugulose, continuous, faintly maculate, without soredia or isidia; medulla white; lower surface moderately rhizinate, the rhizines densely dichotomously branched. Apothecia common, adnate to substipitate, the disc light brown, 2–4 mm in diameter; spores 5μ–6μ × 8μ–10μ.

CHEMISTRY.—Cortex K+ yellow, medulla K−, C+ red (atranorin and olivetoric acid).

DISTRIBUTION.—Southeastern Brazil and Argentina.

HABITAT.—On trees, rarely on humus over rocks, in open woods at about 500–1200 m elevation.