1	"Petal-like staminodes present"	2
1	"Petal-like staminodes absent"	11
2	"Placentation axile"	Mesembryanthemum
2	"Placentation parietal or basal"	3
3	"Fruit fleshy, indehiscent"	4
3	"Fruit a capsule"	5
4	"Styles 7–16"	Carpobrotus
4	"Styles 4 or 5"	Sarcozona
5	"Capsule dehiscing when dry"	"Conicosia {Conicosia pugioniformis subsp. muirii}"
5	"Capsule hygroscopic, dehiscing when wet"	6
6	"Plants annual"	7
6	"Plants perennial"	8
7	"Ovary with 12–20 locules"	"Carpanthea {Carpanthea pomeridiana}"
7	"Ovary with 5, rarely 4, locules"	Cleretum
8	"Leaves densely papillose, clavate"	"Drosanthemum {Drosanthemum candens}"
8	"Leaves smooth, clavate or triquetrous"	9
9	"Placental tubercle none"	Lampranthus
9	"Placental tubercle present"	10
10	"Plants prostrate, rooting at nodes"	"Disphyma {Disphyma crassifolium subsp. clavellatum}"
10	"Plants erect"	"Ruschia {Ruschia geminiflora}"
11	"Fruit indehiscent"	Tetragonia
11	"Fruit dehiscent"	12
12	"Fruit opening by slits or valves"	13
12	"Fruit a circumsciss capsule"	15
13	"Leaves opposite"	Gunniopsis
13	"Leaves alternate"	14
14	"Stamens numerous; perianth segments c. 10 mm long"	"Aizoon {Aizoon rigidum}"
14	"Stamens 10; perianth segments 2–3 mm long"	Aizoon
15	"Bracts absent"	"Sesuvium {Sesuvium portulacastrum}"
15	"Bracts associated with flowers"	16
16	"Ovary 1-locular"	Trianthema
16	"Ovary 2-locular"	"Zaleya {Zaleya galericulata}"