1	"Flower buds with a lid (calyptra or operculum) formed from the fused perianth segments"	2
1	"Flower buds without a lid-like covering"	3
2	"Flowers compound in branching clusters; fruits urn-shaped; sap generally red"	Corymbia
2	"Flowers mostly in flat-topped clusters of 3, 7, 11, 15(–35); fruits rarely urn-shaped or sap rarely red"	Eucalyptus
3	"Leaves alternate"	4
3	"Leaves opposite"	13
4	"Ovary with 1 chamber"	5
4	"Ovary with more than 1 chamber"	9
5	"Stamens numerous, rarely in a ring; staminodes absent"	Calytrix
5	"Stamens in a ring of either 8 or 10 fertile stamens alternating with 10 infertile ones"	6
6	"Flowers 4-parted; outer flowers sterile; staminodes absent"	Actinodium
6	"Flowers 5-parted, bisexual; staminodes 10"	7
7	"Sepals deeply divided, giving flowers a feathery appearance; petals often divided"	Verticordia
7	"Sepals and petals not divided"	8
8	"Petals erect, shorter than the style; anthers with 2 terminal pores"	Darwinia
8	"Petals spreading, longer than the style; anthers opening by longitudinal slits"	Chamelaucium
9	"Stamens not or hardly longer than the petals"	10
9	"Stamens clearly longer than the petals"	11
10	"Flowers either in globular heads or with conspicuous bracts at the base"	Agonis
10	"Flowers not as above"	Leptospermum
11	"Tree with leaves 10 cm or more long (in cultivated species); petals yellow; stamens 2–3 cm long"	Xanthostemon
11	"Combination of characters not as above"	12
12	"Flowers in short to long spikes; sepals absent or inconspicuous on the fruit"	Callistemon
12	"Flowers in heads or solitary, rarely spike-like; sepals prominent on the fruit"	Kunzea
13	"Ovary 1-chambered; fruit indehiscent; stamens united in a ring, 10 fertile stamens alternating with 10 sterile stamens"	Chamelaucium
13	"Combination of characters not as above"	14
14	"Leaves opposite, decussate, stalkless; stamens numerous, about as long as the petals"	Hypocalymma
14	"Combination of characters not as above"	15
15	"Leaves more than 3 cm long"	16
15	"Leaves less than 3 cm long"	19
16	"Flowers stalkless"	Syncarpia
16	"Flowers stalked"	17
17	"Flowers deep red"	Metrosideros
17	"Flowers white or cream"	18
18	"Fruit a loculicidal, woody, mostly ribbed capsule; sepals persistent, erect and woody"	Angophora
18	"Fruit not loculicidal, papery or leathery, without ribs; sepals spreading, papery"	Backhousia
19	"Ovary with 2–3 chambers"	20
19	"Ovary with 1 chamber"	23
20	"Stamens longer than the petals"	Kunzea
20	"Stamens shorter than the petals"	21
21	"Staminal bundles opposite the sepals"	Astartea
21	"Staminal bundles opposite the petals"	22
22	"Ovary of 3 chambers; anthers attached at the base and opening by pores or small slits; sepals mostly compound"	Babingtonia
22	"Ovary mostly 2-chambered; anthers attached near middle and splitting longitudinally"	Baeckea
23	"Fertile stamens 10, sterile stamens 10; style projecting"	24
23	"Stamens to twice the number of the petals, sterile stamens absent; style not or hardly projecting"	25
24	"Sepals ending in a thin extension"	Homoranthus
24	"Sepals without a thin extension but sometimes with a short hair-like tip"	Darwinia
25	"Stamens 5, opposite the sepals"	Thryptomene
25	"Stamens either 5, opposite the petals or 10(12) and opposite the sepals and petals"	Micromyrtus