Leptogium brebissonii Mont.
Thallus lobate, dark green-black, pulpy and conspicuous when wet, olive brownish or greyish or grey-black, and thin, inconspicuous when dry, to 5 cm diam., corticolous or terricolous. Lobes irregular, poorly developed, complexly and delicately ridged and plicate, isidiate. Isidia numerous, laminal, terete, simple, becoming coralloid-branched, rather fine, to 1 mm tall. Lower surface pale olive, wrinkled-plicate. Apothecia very rare, sessile or adnate, 1-1.5 mm diam., disc pale red-brown, plane, becoming convex, thalline exciple thin, entire, rather granular, becoming excluded with age. Ascospores fusiform, submuriform, 30-45 × 5.5-7 µm.
N: Northland (Three Kings Is, to South Auckland). An epiphyte of Leptospermum and Metrosideros bark in northern coastal forest, but still very much undercollected and poorly known in New Zealand.
Cosmopolitan
