Tuckermannopsis chlorophylla

This foliose species has a dark green to brown thallus that turns dull green when wet. The lobes are erect and form tufts with upright margins. The apices of the lobes are incised and soralia are found along the margins. The under surface is pale coffee brown, but paler towards the centre where there are a few simple, pale rhizines.

Medulla: C-, K-, UV-

In Scotland, Tuckermannopsis chlorophylla is common in upland areas where it can be found on coniferous trees, birch, fence posts and, rarely, on siliceous rocks. BLS distribution map

Tuckermannopsis chlorophylla can be found alongside Cetraria sepincola and Melanohalea septentrionalis on birch branches.

Tuckermannopsis chlorophylla can be distinguished from Platismatia glauca by its greenish brown, as opposed to grey green, colour. The under surface also also becomes paler rather than darker towards the centre. Tuckermannopsis chlorophylla can be distinguished from Cetraria sepincola on basis of the presence of soralia rather than abundant apothecia.

Tuckermannopsis chlorophylla on a fenceposts in Glen Tanar NNR (VC92)
Tuckermannopsis chlorophylla on a boulder in heathland in The Forest of Birse (VC92)