Complex sentence: The leaves are evergreen, opposite, simple, usually slightly rough-surfaced, 2--8 cm long; in a few species (notably "C. ladanifer"), the leaves are coated with a highly aromatic resin called labdanum.
Split into simpler sentences: The leaves are evergreen, opposite, simple, usually slightly rough-surfaced, 2--8 cm long. In a few species (notably "C. ladanifer"), the leaves are coated with a highly aromatic resin called labdanum.