1	"Largest leaves more than 20 mm wide"	2
1	"Largest leaves 1-17 mm wide"	3
2	"Leaves glabrous; petals linear; mangroves"	Sonneratia
2	"Leaves at least sparsely hairy; petals broadly-obovate to orbicular; not growing in salty areas"	Lagerstroemia
3	"Leaves and branchlets at least sparsely hairy"	4
3	"Leaves and branchlets glabrous"	6
4	"Pedicels 5-13 mm long; leaves with appressed hairs on both surfaces"	Pemphis
4	"Pedicels 0-1.5 mm long; leaves with spreading hairs on lower leaf surface only"	5
5	"Hypanthium markedly asymmetrical at base, often with a spur extending beyond point of insertion of pedicel; small woody shrubs"	Cuphea
5	"Hypanthium symmetrical at base, spur absent; herbaceous plants"	Lythrum
6	"Some branchlets spinescent; petals 15-30 mm long; fruit a leathery berry 5-10 cm diameter"	Punica
6	"All branchlets innocuous; petals 1-10 mm long; fruit a dry capsule < 0.5 cm diameter"	7
7	"Hypanthium narrowly cylindrical"	Lythrum
7	"Hypanthium campanulate to sub-globose"	8
8	"Petals yellow; woody shrub"	Heimia
8	"Petals white, pink or red; herbaceous plants"	9
9	"Flowers on pedicels 1-25 mm long; inflorescence cymose or rarely flowers solitary"	Ammannia
9	"Flowers sessile and solitary in axils of leaves or bracts"	Rotala