Complex sentence: The leaves are generally basal, and are about 1-3 cm long, grey green, and have an intensely strong, pleasant, and mildly intoxicating mint aroma when handled or crushed.
Split into simpler sentences: The leaves are generally basal, and about 1-3 cm long. The grey green colored leaves have an intensely strong but pleasant scent and are mildly intoxicating with a minty aroma when handled or crushed.