1	"Stipules spinescent, usually more than 4 and up to 10 in each whorl"	"Fagonia charoides"
1	"Stipules spinescent or not, only in whorls of 4"	2
2	"All or most leaves with 3 leaflets"	3
2	"All leaves with 1 leaflet or simple"	4
3	"Stipular spines 2.5-6 mm long; petails 6-8 mm long"	"Fagonia lahovarii"
3	"Most stipular spines well over 6 mm long; petals 3.5-5 mm long"	"Fagonia schweinfurthii"
4	"Stipules up to 2 mm long,  spinescent or not; leaf blades 5-25 mm wide"	"Fagonia luntii"
4	"Stipules 5-20 mm long, spinescent; leaf blades up to 5 mm wide"	5
5	"Plants glandular-pubescent; sepals more or less persistent in fruit"	"Fagonia indica"
5	"Plants glabrous; sepals soon falling"	"Fagonia paulayana"