Polygala L.
Herbs or shrubs. Lvs alternate, opposite or verticillate. Fls in terminal, pseudolateral or axillary heads, racemes or panicles. Calyx 4-5-merous; 2 inner segments usually larger and petaloid (wings), persistent or deciduous. Petals usually 3, the outer sometimes reduced, the inner (keel) often beaked or with a fimbriate crest. Stamens usually 8, rarely 6; anthers 1-2-locular. Fr. a 2-celled, laterally flattened, dehiscent, oval to orbicular capsule, sometimes winged, usually membranous; seed usually hairy.
Key
4
Lower lvs, and sometimes upper lvs, opposite or subopposite; racemes 4-10-flowered, terminal or appearing lateral; capsule 2-4.5 mm long, usually 1/2-3/4 length of calyx wings
All lvs usually alternate, rarely subopposite; racemes (8)-10-25-(35)-flowered, all terminal; capsule 4-6 mm long, 3/4 to = calyx wings
500-600 spp., cosmopolitan. Naturalised spp. 5.