Definition
Genus Calluna refers to a specific group of plants containing only one recognized species, Calluna vulgaris, commonly known as heather or ling. Think of 'genus' as a family name. Heather, the sole member, is a low-growing evergreen shrub known for its small leaves and bell-shaped flowers. Unlike diverse genera with many species, Calluna stands alone, unique and resilient. It's like the solo artist who creates their own distinct genre.