Ramalina arabum
Alectoria arabum Dill. ex Ach., Lich, Univ.: 596 (1810).
Thallus ± pendulous or straggling, 3-8(-12) cm long, corticolous. Branches rigid, angular-terete, 0.1-0.6(-1.0) mm wide, dichotomously branching, with occasional, twisted, deformed, lateral branchlets, apices fine, acute or twisted- deformed, hair-like, complex, entangled, surface matt, yellow-green to greyish or grey-fawn, occasionally narrowly white-striate or longitudinally grooved near base. Apothecia not seen. Chemistry: Cortex K+ yellow; medulla K+ yellow → red, C-, KC+ red, Pd+ orange. Norstictic and salazinic (tr.) acids.
N: Northland (Three Kings Is, Poor Knights Is). On bark of Metrosideros excelsa and other coastal trees and shrubs.
Pantropical
