1	"Largest leaves <10 cm long; hypanthium not ribbed or faintly ribbed"	2
1	"Largest leaves 10-25 cm long; hypanthium conspicuously ribbed"	4
2	"Hypanthium with many short patent hairs; leaves white on lower surface"	"Lagerstroemia microcarpa"
2	"Hypanthium glabrous; leaves green on lower surface"	3
3	"Leaf apex obtuse; petals 10-12 mm long (excluding stalk)"	"Lagerstroemia indica"
3	"Leaf apex acute to acuminate; petals c. 3 mm long (excluding stalk)"	"Lagerstroemia subcostata"
4	"Hairs unbranched, very short"	"Lagerstroemia speciosa"
4	"Hairs branched (stellate or dendritic), longer"	5
5	"Largest leaves >7 cm wide; petals 20-30 mm long, including stalk"	"Lagerstroemia loudonii"
5	"Largest leaves 4-6 cm wide; petals 10-16 mm long, including stalk"	6
6	"Branchlets and rachis with predominantly dendritic hairs; flower buds obconical; calyx ribs 12, all equally prominent; bark smooth and shiny"	"Lagerstroemia floribunda"
6	"Branchlets and rachis with mainly stellate hairs; flower buds obovoid; calyx with 6 prominent ribs, and often with an inconspicuous rib between each; bark dull"	7
7	"Leaves persistently stellate-hairy on lower surface; flowers white; hairs on calyx 0.2-0.4 mm across; bark persistent, pale to dark grey, scaly"	"Lagerstroemia tomentosa"
7	"Leaves glabrescent; flowers bright pink; hairs on calyx 0.1-0.2 mm across; bark pale grey, dull, smooth"	"Lagerstroemia archeriana"