1	"Shrub; fruit a capsule, inflated; petals 4--5 mm wide"	"Peritoma arborea"
1	"Annual, short-lived perennial herb; fruit a capsule, not or +- inflated, or 2 nutlets; petals < 4 mm wide"	2
2	"Flowers in axillary heads; style in fruit stout, spine-like; fruit 2 nutlets"	"Oxystylis {Oxystylis lutea}"
2	"Flowers in +- terminal racemes or 1 in leaf axils; style in fruit stout or not but not spine-like; fruit 2 nutlets or a capsule"	3
3	"Stamens 8--32; ovary +- sessile; fruit a capsule, valves persistent"	"Polanisia {Polanisia dodecandra subsp. trachysperma}"
3	"Stamens 6; ovary on stalk-like receptacle; fruit 2 nutlets or a capsule, valves deciduous"	4
4	"Fruit 2 nutlets, each 1(3)-seeded; septum 1 mm wide"	Wislizenia
4	"Fruit a capsule, 2--many-seeded; septum 1--25 mm wide"	5
5	"Fruit 2--6 mm, often wider than long; septum elliptic to round"	Cleomella
5	"Fruit generally 12--55 mm, longer than wide; septum linear to oblong"	6
6	"Inflorescence open, few-flowered; receptacle in fruit 2--5 mm; anthers 3--6 mm"	"Carsonia {Carsonia sparsifolia}"
6	"Inflorescence dense, many-flowered; receptacle in fruit 5--18 mm; anthers 1.8--2.6 mm"	Peritoma