1	"Spreading plant with a rosette of basal leaves"	"Polygala calcarea"
1	"Plant without a basal leaf rosette"	2
2	"At least a few leaves appearing opposite"	3
2	"Leaves alternate"	4
3	"All leaves opposite"	"Polygala fruticosa"
3	"Some leaves opposite"	"Polygala ×dalmaisiana"
4	"Shrub with purplish flowers"	"Polygala virgata"
4	Herb	5
5	"Leaves oblong-ovate, mostly 3–5 cm long"	"Polygala myrtifolia"
5	"Leaves linear to ovate, 1.5–3 cm long"	"Polygala chamaebuxus"