1	"Tree or large shrub; anther-bearing stamens 10–30 "	2
1	"Mostly small shrubs; anther-bearing stamens 2–5 "	4
2	"Large shrub; flowers bisexual "	Dombeya
2	"Tree; flowers unisexual "	3
3	"Mostly evergreen; fruit woody, not splitting until mature "	Brachychiton
3	"Deciduous; fruit membranous, soon splitting into leafy segments "	Firmiana
4	"Stamens forming a tube at the base; petal-like sepals clear yellow "	Fremontodendron
4	"Stamens not forming a tube at the base; petal-like stamens not yellow "	5
5	"Petals more or less as long as the (often purple) calyx, long and very narrow (ligule) "	"Rulingia (& Commersonia)"
5	"Petals small, scale-like or absent (sepals petal-like)"	6
6	"Petal-like sepals with 1 thickened midrib, cut about half way and with 3 sepal-like bracteoles below "	Thomasia
6	"Petal-like sepals with 3–5 or no ribs, bracteoles 1–3 below, narrow not sepal-like "	7
7	"Sepals divided almost to the base, ribs absent"	Lasiopetalum
7	"Sepals divided more or less to the middle and with 3–5 ribs "	Guichenotia