Despite its resemblance to Lecania cyrtella, L. juniperi stands out due to its warted and sorediate thallus, larger apothecia, and distinct ascospores.

The areoles range in colour from pale grey to greyish brown, and the upper surface can be smooth or prominently warted.

[2] This lichen is a part of the Lecania cyrtella group, which also includes two sorediate (saxicolous) species, L. erysibe and L. leprosa.

Lecania juniperi differs from these species due to its warted thallus, larger apothecia, and wider ascospores.

[2] Lecania juniperi is found exclusively on thin branches of Juniperus phoenicea shrubs, in open and exposed areas along the Atlantic Coast of Portugal, at an elevation of approximately 50 m (160 ft).