Polygala is a genus of small herbs (ours).
Leaves alternate or whorled (ours).
Flowers very irregular; 5 sepals, the 2 inner (wings) larger and often petal-like, the 3 outer sepals smaller; 3 petals, fused with filaments of the at base forming a tube, the 2 upper petals alike, the lower petal keel-shaped with a fringed crest; stamens 8 or sometimes 6; the flowers of our species small in heads or dense spike-like clusters.
Fruit 2-parted capsule, each part one-seeded with a fleshy attachment (aril). Arils generally adapted to ant dispersal.