1	"Leaves simple or with 1 leaflet"	2
1	"At least the lower leaves, sometimes all leaves,  with 3 leaflets"	5
2	"Stems with 4-angled internodes"	3
2	"Stems with cylindrical internodes"	4
3	"Leaflets 4-12 mm long; sepals shorter than 3 mm; petals up to 6 mm long"	"Fagonia bruguieri"
3	"Leaflets up to 18 mm long; sepals 3-4 mm long; petals 6-8 mm long"	"Fagonia olivieri"
4	"Mature plants glabrous, young plans sometimes pruinose and glandular; leaves with 1 leaflet; leaflets narrowly to broadly lanceolate; sepals persistent"	"Fagonia indica"
4	"Plants covered with sticky glands; leaves simple, blades naorally to broadly oblanceolate or broadly ovate; sepals deciduous"	"Fagonia ovalifolia"
5	"Plants glabrous"	6
5	"Plants covered with sessile or stipitate glands or hairs"	7
6	"Flowers less than 1.5 cm across; sepals 3-4 mm long; petals 4-6 mm long; pedicels of fruits about twice as long as the capsules"	"Fagonia indica"
6	"Flowers 1.5 cm or more across; sepals about 5 mm long; petals 1.2-1.5 cm long; pedicels of fruits about equaling the capsules"	"Fagonia acerosa"
7	"Stems with 4-angled internodes"	8
7	"Stems with cylindrical internodes"	9
8	"Lower leaves with 3 leaflets, upper leaves with 1; leaftlets up to 12 mm long"	"Fagonia bruguieri"
8	"All leaves with one leaflet, these up to 10 mm long"	"Fagonia olivieri"
9	"Lealets oblongovate-to rhombic; sepals less than 3 mm long; pedicels of fruits shorter than the capsules"	"Fagonia glutinosa"
9	"Leaflets linear-oblong; sepals 3-4 mm long; pedicels of fruits about twice as long as the capsules"	"Fagonia indica"