1	"Leaves with hairs below "	2
1	"Leaves hairless "	3
2	"Leaves softly white-hairy beneath, lobes triangular, extending to about the middle of the leaf blade"	"Brachychiton discolor"
2	"Leaves with pale brown hair below, lobes hardly triangular, cut deeper than middle "	"Brachychiton ×excellens"
3	"Leaf blades 6–12 cm long or, if longer, waxy blue below; flowers whitish to green "	4
3	"Leaf blades 12–20 cm long, not waxy blue below; flowers pinkish to bright red "	5
4	"Trunk cylindrical or tapering; leaves entire or occasionally shallowly lobed; flowers greenish, hairless inside "	"Brachychiton populneus"
4	"Trunk swollen in centre; leaves mostly narrowly lobed; flowers cream, hairy and spotted red inside "	"Brachychiton rupestris"
5	"Leaves mostly 4–7 cm wide; leaf stalks 1–2 mm wide; flowers dull pink outside "	"Brachychiton ×roseus"
5	"Leaves mostly 5–18 cm wide; leaf stalks 2–4 mm wide; flowers bright red "	"Brachychiton acerifolius"