is a specific kind of: subshrub, suffrutex.

is a broader term that covers: Polygala alba, senega | candyweed, orange milkwort, Polygala lutea, yellow bachelor's button, yellow milkwort | bird-on-the-wing, flowering wintergreen, fringed polygala, gaywings, Polygala paucifolia | Polygala senega, Seneca snakeroot, senega root, senega snakeroot, Seneka snakeroot, senga root | common milkwort, gand flower, Polygala vulgaris.

is a member of: genus Polygala, Polygala.