1	"Petal-like staminodes absent"	2
1	"Petal-like staminodes present"	7
2	"Fruit indehiscent"	Tetragonia
2	"Fruit dehiscent"	3
3	"Fruit opening by slits or valves"	4
3	"Fruit a circumscissile capsule"	5
4	"Leaves alternate"	"Aizoon: Aizoon pubescens"
4	"Leaves opposite"	Gunniopsis
5	"Bracts absent"	"Sesuvium: Sesuvium portulacastrum"
5	"Bracts associated with flowers"	6
6	"Ovary 1-locular"	Trianthema
6	"Ovary 2-locular"	"Zaleya: Zaleya galericulata"
7	"Placentation axile"	8
7	"Placentation parietal or basal"	9
8	"Sepals 4"	"Aptenia: Aptenia cordifolia"
8	"Sepals 5"	Mesembryanthemum
9	"Fruit fleshy, indehiscent"	10
9	"Fruit a capsule"	11
10	"Styles 7-16"	Carpobrotus
10	"Styles 4 or 5"	Sarcozona
11	"Plants annual"	Cleretum
11	"Plants perennial"	12
12	"Ovary 8-11-locular"	"Malephora crocea"
12	"Ovary < 6-locular"	13
13	"Leaves densely papillose, clavate"	"Drosanthemum: Drosanthemum candens"
13	"Leaves smooth, clavate or triquetrous"	14
14	"Placental tubercle none"	"Lampranthus: Lampranthus glaucus"
14	"Placental tubercle present"	15
15	"Plants prostrate, rooting at nodes"	"Disphyma: Disphyma crassifolium subsp. clavellatum"
15	"Plants erect"	"Ruschia: Ruschia macowanii"