1	"Leaves opposite or in whorls"	2
1	"Leaves alternate"	44
2	"Longest leaves less than 40 mm long"	3
2	"Longest leaves more than 40 mm long"	20
3	"Flowers with 8 undifferentiated perianth segments; shrub confined to mangroves"	Osbornia
3	"Flowers with 4 or 5 petals, and 4 or 5 sepals; shrubs or trees not occurring in mangrove communities"	4
4	"Fruits fleshy, a berry"	5
4	"Fruits dry, capsular or indehiscent"	8
5	"Fruits with a bony endocarp; flowers pink"	Lithomyrtus
5	"Fruits lacking bony endocarp; flowers white"	6
6	"Mature fruits grey with many dark speckles"	Austromyrtus
6	"Mature fruits purple to black, without speckles"	7
7	"Petals short; seed testa hard and bony"	Uromyrtus
7	"Petals long; seed testa soft, tuberculate"	Pilidiostigma
8	"Fruits capsular, 2-3 locular"	9
8	"Fruits indehiscent, 1(-2) locular"	16
9	"Stamens fused into bundles or ‘claws’"	Melaleuca
9	"Stamens all free"	10
10	"Branchlets hairy; stamens longer than petals"	Kunzea
10	"Branchlets glabrous; stamens shorter than petals"	11
11	"Ovules and seeds reniform, not angular"	12
11	"Ovules and seeds D-shaped, angular"	13
12	"Ovules 2 per loculus; stamens 5-8; seeds arillate"	Ochrosperma
12	"Ovules 8-13 per loculus; stamens 14-18; seeds not arillate"	Triplarina
13	"Inflorescences 3-7 flowered"	Sannantha
13	"Inflorescences 1-flowered"	14
14	"Anthers versatile, dehiscing by long parallel slits"	Baeckea
14	"Anthers adnate, dehiscing by pores or short divergent slits"	15
15	"Sepals without dorsal appendage; leaves linear; capsule apex flat"	Harmogia
15	"Sepals with dorsal appendage; leaves oblanceolate to orbicular; capsule apex convex"	Kardomia
16	"Stamens >30, in several whorls"	Backhousia
16	"Fertile stamens 12 or fewer"	17
17	"Stamens ten and staminodes ten"	18
17	"Stamens usually 5, rarely 6, 10 or 12, staminodes absent; sepal apex obtuse, entire"	19
18	"Corolla tube long; sepal apex a single filament or 2-12 linear divisions, rarely obtuse; petals entire"	Homoranthus
18	"Corolla tube absent or short; sepals divided into many plumose segments; petals fimbriate"	Verticordia
19	"Stamens opposite the petals; ovules 4-9"	Micromyrtus
19	"Stamens opposite the sepals; ovules 2"	Thryptomene
20	"Fruit a fleshy, indehiscent berry"	21
20	"Fruits dry, capsular or indehiscent"	35
21	"Seed solitary, occasionally two"	22
21	"Seeds 2-numerous per fruit"	26
22	"Vegetative buds and flower buds pubescent"	Eugenia
22	"Vegetative buds and flower buds glabrous"	23
23	"Anther cells globose and divergent"	Acmena
23	"Anther cells linear, parallel"	24
24	"Petals 6-8"	Acmenosperma
24	"Petals 4-5"	25
25	"Ovules pendulous"	Waterhousea
25	"Ovules radiating or ascending"	Syzygium
26	"Bark smooth, shiny, deciduous, white, pink, orange or green"	27
26	"Bark rough, fibrous or scaly, dull, persistent, grey to brown"	28
27	"Mature fruits 30-50 mm diameter, yellow to red; seeds >10"	Psidium
27	"Mature fruits 3-19 mm diameter, purple to black; seeds 1-8"	Gossia
28	"Leaves strongly 3-veined from base"	29
28	"Leaves with distinct intramarginal veins, but not strongly 3-veined"	31
29	"Ovary 1-locular; flowers 4-merous"	Rhodamnia
29	"Ovary 2-4-locular; flowers (4-) 5-merous"	30
30	"Branchlets and leaves glabrous or very sparsely hairy"	Archirhodomyrtus
30	"Branchlets and leaves moderately to densely hairy"	Rhodomyrtus
31	"Stigma small, not dilated"	32
31	"Stigma peltate, dilated"	34
32	"Flowers and fruits pendant, solitary in leaf axils"	Uromyrtus
32	"Flowers and fruits ascending, in small racemes or panicles, rarely solitary"	33
33	"Ovary 3-4-locular; placenta apically or subapically attached"	Lenwebbia
33	"Ovary 2-locular; placenta attached at midpoint or lower"	Gossia
34	"Testa membranous, glandular-tuberculate"	Pilidiostigma
34	"Testa hard, not tuberculate"	Decaspermum
35	"Stamens grouped into bundles or staminal ‘claws’"	36
35	"Stamens all free from one another"	38
36	"Leaves in whorls of four"	Lophostemon
36	"Leaves opposite"	37
37	"Flowers yellow; staminal fascicles much longer than petals; seeds 3-angled at distal end"	Barongia
37	"Flowers white; staminal fascicles about same length as petals; seeds irregularly ovoid"	Sphaerantia
38	"Leaves linear, <4 mm wide"	Lysicarpus
38	"Leaves lanceolate to orbicular, 10-70 mm wide"	39
39	"Fruit indehiscent, enclosed in persistent hypanthium"	Backhousia
39	"Fruit dehiscent, capsular, 2-6-locular"	40
40	"Inflorescences 3-flowered or 7-flowered on long peduncles, flowers sessile"	41
40	"Inflorescence a many-flowered terminal panicle or corymb; flowers pedicellata"	42
41	"Inflorescence 3-flowered; hypanthium splitting into 4 segments at anthesis"	Stockwellia
41	"Inflorescence 7-flowered; hypanthium not splitting at anthesis"	Syncarpia
42	"Capsule protruding well beyond hypanthium"	Xanthostemon
42	"Capsule not protruding from hypanthium"	43
43	"Flowers bright yellow; stamens 5-8"	Thaleropia
43	"Flowers white or creamy; stamens >50"	Angophora
44	"Petals and sepals fused in an operculum, deciduous at anthesis"	45
44	"Petals and sepals present as distinct whorls, not forming an operculum"	46
45	"Juvenile plants with bristle glands; adult leaves with 30-90 pairs of lateral veins"	Corymbia
45	"Juvenile plants lacking bristle glands; adult leaves with 10-40 pairs of lateral veins"	Eucalyptus
46	"Fruit indehiscent or splitting irregularly"	47
46	"Fruit dehiscent, capsular"	49
47	"Ovary 3-locular; fruit not enclosed by hypanthium, indehiscent or splitting irregularly; leaves 10-17 cm long"	Lindsayomyrtus
47	"Ovary 1-locular; fruit enclosed within persistent hypanthium, indehiscent; leaves 0.2-1 cm long"	48
48	"Sepals terminated by a long slender filament"	Calytrix
48	"Sepals short, obtuse"	Homalocalyx
49	"Stamens longer than petals"	50
49	"Stamens same length as petals or shorter than petals"	53
50	"Stamens basally connate into bundles"	51
50	"Stamens all free from each other"	52
51	"Filaments (free portion) clustered at distal end; seed winged; fruits fused into a globose head"	Asteromyrtus
51	"Filaments (free portion) distributed along much of the stamen length; seeds not winged; fruit arrangement various, but fruits not fused"	Melaleuca
52	"Capsule more or less globose, greatly exceeding the hypanthium"	Xanthostemon
52	"Capsule not globular, and not exceeding the hypanthium"	Kunzea
53	"Stamens fused into fascicles"	54
53	"Stamens all free from each other"	56
54	"Capsule included within the hypanthium or barely exserted; seeds linear, without a wing"	Lophostemon
54	"Capsule strongly exserted from the hypanthium; seeds ovoid, wing membranous or reduced to a spur"	55
55	"Summit of capsule hemispherical; oil ducts absent from petiole"	Tristaniopsis
55	"Summit of capsule conical; oil ducts present in petiole"	Welchiodendron
56	"Inflorescence a many-flowered, rainforest habitat; leaves > 5 cm wide"	57
56	"Inflorescences solitary or up to 12-flowered, open forest habitat; leaves < 2 cm wide"	58
57	"Ovary 3-locular; capsule rounded, valves strongly lignified"	Ristantia
57	"Ovary 2-locular; capsule conical, valves lightly lignified"	Mitrantia
58	"Flowers 3-12 per inflorescence"	59
58	"Flowers solitary, or occasionally 2 together"	60
59	"Sepals deciduous in fruit; flowers and fruits sessile in globose heads (Asteromyrtus lysicephala)"	Asteromyrtus
59	"Sepals persistent in fruit; flowers and fruits sessile in ellipsoidal heads, or pedunculate and 3-flowered"	Aggreflorum
60	"Seeds with a single broad wing; stamens >30, anthers non-versatile"	Neofabricia
60	"Seeds not winged; stamens 15-30, anthers versatile"	61
61	"Fruit persistent, woody; seeds linear, striate; sepals deciduous"	Leptospermum
61	"Fruit deciduous, not woody; seeds narrowly ovoid with a reticulate surface; sepals persistent"	Gaudium