Parmelia malaccensis

Parmelia malaccensis

Pseudoparmelia malaccensis (Nylander) Hale, 1974:190.

Parmelia malaccensis Nylander in Nylander and Crombie, 1883:52 [type collection: St. Johns Hill, Malacca, Malaya, Maingay 21 (BM, lectotype; FH, H, Nylander herbarium number 34984, isolectotypes)].

DESCRIPTION.—Thallus closely adnate on bark, yellowish green, 2–8 cm in diameter; lobes short, sublinear, 0.5–1.5 mm wide; upper surface plane to convex, shiny, distinctly white reticulate at the lobe tips, tangentially cracked with age, isidiate, the isidia simple, 0.2–0.5 mm high; lower surface pale brown, densely rhizinate, the rhizines simple to sparsely branched, becoming dark brown. Apothecia rare, adnate, 1–2 mm in diameter; spores 8, 4–5 × 6–7 μm.

CHEMISTRY.—Cortex K+ yellowish, medulla K−, C−, KC+ rose, P+ red; protocetraric acid and usnic acid.

DISTRIBUTION.—Africa, India, Sri Lanka, Indonesia, Malaysia, and the Philippines.

HABITAT.—On trunks and canopy branches of trees in lowland rain forest from sea level to 150 m elevation.