Anzia gallowayi

The lichen forms loose, pale grey patches about 1–2.5 cm wide on bark. Its lobes are narrow, separate, and repeatedly branched, and the upper surface is smooth and only sparsely dotted with tiny spherical isidia. The medulla is white. The underside surface is pale between the dark, bead-like cushions of the spongiostratum—a distinctive, bead-like layer that forms dark brown to black, spherical to ellipsoid cushions up to about 1.0 mm thick. Rhizines (root-like attachment hairs) are simple and scattered, up to about 1.2 mm long, tufted at their tips and inserted singly along the edge of the spongiostratum. No apothecia and pycnidia (sexual and asexual reproductive structures) have been reported. Spot tests give a K+ (yellow) reaction in the cortex, while the medulla is K–, C–, and P–. The main reported lichen products are atranorin and chloroatranorin (minor) in the cortex, and divaricatic acid (major) in the medulla.^[2]

Anzia gallowayi grows on bark and was known at the time of description only from the original collection made at the type locality in the Hunua Ranges of New Zealand's North Island.^[2] In a 2012 assessment of the conservation status of New Zealand lichens, A. gallowayi was listed as "data deficient";^[3] this status had not been changed in a 2018 update.^[4]