1	"Flowers with several to numerous petaloid staminodes; ovules more than 3 per locule; seeds usually more than 15 per fruit"	2
1	"Flowers without petaloid staminodes; ovules 1 or 2 per locule; seeds fewer than 10 per fruit"	13
2	"Leaves relatively broad, flat on both surfaces"	3
2	"Leaves terete to trigonous or triquetrous"	5
3	"Sepals 4; leaves opposite throughout"	"Mesembryanthemum {Mesembryanthemum cordifolium}"
3	"Sepals 5; leaves sometimes becoming alternate on flowering stems"	4
4	"Leaves alternate on flowering stems; stamens numerous; petaloid staminodes white"	Mesembryanthemum
4	"Leaves opposite throughout; stamens 5–10; petaloid staminodes yellow"	"Cleretum {Cleretum papulosum}"
5	"Leaves terete to trigonous (then faces usually convex); flowers not enclosed within involucre; fruit a dehiscent capsule"	6
5	"Leaves trigonous to triquetrous, with ± flat or concave faces and acute angles; flowers sometimes partly enclosed within 2-lobed involucre; fruit fleshy, indehiscent"	12
6	"Leaves withering and soon deciduous, branches retaining only the persistent leaf bases; surface smooth; annual or biennial"	"Mesembryanthemum {Mesembryanthemum granulicaule}"
6	"Leaves persistent; surface smooth or papillate"	7
7	"Leaves opposite on lower branches, alternate above"	Mesembryanthemum
7	"Leaves opposite throughout (sometimes appearing rosetted at base)"	8
8	"Plant prostrate, rarely erect, rooting at nodes"	9
8	"Plant erect or trailing, not rooting at nodes"	11
9	"Leaves 10–20 mm long, subglaucous; petaloid staminodes pink to red"	Lampranthus
9	"Leaves mostly 20 mm long or more, bright green or grey-green; petaloid staminodes pink or yellow"	10
10	"Petaloid staminodes yellow; leaves rosetted at base"	"Conicosia {Conicosia pugioniformis subsp. muirii}"
10	"Petaloid staminodes pink; leaves opposite throughout"	"Disphyma {Disphyma crassifolium  subsp. clavellatum}"
11	"Leaves clavate, densely papillose"	"Drosanthemum {Drosanthemum candens}"
11	"Leaves trigonous (the dorsal angle sometimes obscure), ± smooth"	"Ruschia {Ruschia geminiflora}"
12	"Surfaces of leaves smooth; styles 6–14"	Carpobrotus
12	"Surfaces of leaves minutely warty; styles 4 or 5"	"Sarcozona {Sarcozona praecox}"
13	"Leaves alternate or clustered; fruit indehiscent or opening by slits or valves"	14
13	"Leaves opposite; fruit a circumsciss capsule"	15
14	"Fruit indehiscent, with hard, woody endocarp; plant glabrous or with vesicular hairs on young stems only; leaves succulent"	Tetragonia
14	"Fruit a capsule; plants variably covered by hairs or hair-like scales; leaves hardly succulent"	Aizoon
15	"Leaves flat; stamens 5–12; ovary 2-locular with 2 styles; capsule more than 3 mm long, splitting in 2 equal parts, operculum without a thick membranous cover"	"Zaleya {Zaleya galericulata}"
15	"Leaves flat or terete; stamens 5; ovary 1-locular with a single style; capsule less than 3 mm long, splitting near base, operculum with a doughnut-shaped membranous cover (in Victoria)"	"Trianthema {Trianthema clavatum}"