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Genus Eucalyptus

Family Myrtaceae

Description: Trees, mallees or shrubs, often forming an underground lignotuber in many species; bark persistent (`rough barks'), or partly or wholly regularly shedding (`smooth barks').

Leaves dimorphic; juvenile leaves opposite; adult leaves usually disjunct opposite (appearing alternate); similifacial or less commonly dorsiventral, oil glands usually present in leaves.

Inflorescences usually based on condensed dichasia, forming umbellasters, mostly solitary and axillary but sometimes aggregated into compound terminal, pseudo-terminal or axillary structures; individual umbellasters usually 7-flowered, but ranging from 1 to >30 flowers in some species. Calyx and/or corolla fused into a calyptra which persists to anthesis. Stamens numerous, usually in several continuous whorls; anthers versatile or adnate, dehiscing by separate or confluent slits or pores. Ovary half-inferior, 2–7-locular, enclosed by hypanthium except at top; ovules numerous, ovulodes present.

Fruit a capsule, becoming woody in most species.

Photo © ANBG

Distribution and occurrence: World: >800 species, all but 16 spp. endemic to Aust. (10 spp. native, 9 spp. N.G., Indon., Philipp.), all States (c. 240 spp. in N.S.W.). Refs Brooker (2000), Chippendale (1988), Hill (1997a & b, 1999), Hill & Johnson (1991, 1995), Hunter (1998b), Hunter & Bruhl (1999), Johnson & Hill (1990, 1999).

Species of Eucalyptus dominate most plant communities in all but the wettest, coldest and driest parts of the continent.

Many species are economically of great importance within Australia as timber, nectar resources for honey production, and for shelter in agricultural and pastoral regions. Species are extensively planted world-wide for timber, fuel, essential oils and pharmaceuticals. The eucalypts show a wide diversity, yet individual species are frequently finely defined and difficult to differentiate. Active taxonomic and morphological study in the group is proceeding, and many species remain to be defined. Generic and infrageneric relationships and limits are also under review. A summary and bibliography are presented by Chippendale (1988). A recent classification by Brooker (2000), formalises many of the names of Pryor and Johnson (1971) for infrageneric taxa that had not been formally published. However, species in this treatment are arranged in natural groupings in the text, following Pryor and Johnson (1971) and subsequent modifications of that system, not that of Brooker (2000).

Text by K.D. Hill
Taxon concept:

	Key to the genus Eucalyptus
1	Bark rough, persistent over entire trunk	2
2	Ironbarks	3
2*	Bark not ironbark	25
25	Stringybarks	26
25*	Not stringybarks	70
70	Valves of fruit enclosed	71
70*	Valves of fruit exserted	135
1*	Bark smooth on trunk	170
170	Valves of fruit enclosed	171
170*	Valves of fruit exserted	228
3	Stamens with filaments regularly inflexed, anthers cuboid	4
4	Adult leaves strongly discolorous	5
5	Fruit 4-angled	Eucalyptus fergusonii
5*	Fruit not angled	Eucalyptus paniculata
4*	Adult leaves concolorous or weakly discolorous	6
6	Calyptra scar present	7
7	Adult leaves glossy	8
8	Longest petioles <20 mm long, largest adult leaves <15 cm long	Eucalyptus placita
8*	Longest petioles >20 mm long, largest adult leaves >15 cm long	Eucalyptus ancophila
7*	Adult leaves dull	9
9	Adult leaves <1.2 cm wide	Eucalyptus beyeriana
9*	Adult leaves >1.2 cm wide	10
10	Adult leaves green or grey-green	11
11	Fruit 4-angled	Eucalyptus tetrapleura
11*	Fruit not angled	12
12	Juvenile leaves glossy green	Eucalyptus ancophila
12*	Juvenile leaves dull, grey-green	13
13	Juvenile leaves lanceolate, 15-20 cm long	Eucalyptus fusiformis
13*	Juvenile leaves narrow-elliptic to elliptic, 3.5-9 cm long	Eucalyptus scopulorum
10*	Adult leaves glaucous	14
14	Fruit longer than broad; adult leaves acute	15
15	Adult leaves broad-lanceolate to ovate	Eucalyptus caleyi
15*	Adult leaves narrow-lanceolate to lanceolate	Eucalyptus fusiformis
14*	Fruit shorter than broad; adult leaves rounded	Eucalyptus panda
6*	No calyptra scar present	16
16	Inflorescences 3-flowered	Eucalyptus tricarpa
16*	Inflorescences >3-flowered	Eucalyptus sideroxylon
3*	Stamens with filaments irregularly flexed, anthers globose	17
17	Adult leaves opposite, ovate to orbiculate	Eucalyptus melanophloia
17*	Adult leaves disjunct, broad-lanceolate or narrow-lanceolate	18
18	Valves distinctly exserted	19
19	Buds not glaucous	20
20	Calyptra more than twice as long as hypanthium	Eucalyptus fibrosa
20*	Calyptra less than twice a long as hypanthium	21
21	Disc flat	Eucalyptus ophitica
21*	Disc depressed	Eucalyptus siderophloia
19*	Buds glaucous	Eucalyptus nubila
18*	Valves not distinctly exserted	22
22	Calyptra conical, acute; juvenile leaves orbiculate to broad-lanceolate	23
23	Buds glaucous	Eucalyptus nubila
23*	Buds not glaucous	24
24	Juvenile leaves broad-lanceolate to ovate, apex acute or obtuse	Eucalyptus siderophloia
24*	Juvenile leaves orbiculate, apex rounded	Eucalyptus fracta
22*	Calyptra rounded or obtuse; juvenile leaves linear to narrow-lanceolate	Eucalyptus crebra
26	Fruit pyriform to conical, flat-topped; inflorescences aggregated or paired	27
27	Inflorescences axillary, often paired; calyptra scar absent	Eucalyptus fastigata
27*	Inflorescences aggregated at shoot tips; calyptra scar present	Eucalyptus microcorys
26*	Fruit not as above; inflorescences usually solitary	28
28	Fruit ovoid to urceolate and disc strongly depressed	29
29	Fruit smooth	30
30	Adult leaves concolorous	Eucalyptus obliqua
30*	Adult leaves strongly discolorous	31
31	Fruit 4-lobed at top	Eucalyptus baileyana
31*	Fruit not 4-lobed at top	32
32	Buds and fruit sessile	Eucalyptus botryoides
32*	Buds and fruit pedicellate	Eucalyptus robusta
29*	Fruit ribbed	Eucalyptus planchoniana
28*	Fruit hemispherical to globose or ovoid; if ovoid then disc not strongly depressed	33
33	Leaves with lateral veins obtuse, reticulation dense and regular, juvenile leaves glabrous	34
34	Adult leaves strongly discolorous	Eucalyptus acmenoides
34*	Adult leaves not strongly discolorous	35
35	Juvenile leaves broad-lanceolate to ovate	36
36	Adult leaves green	Eucalyptus umbra
36*	Adult leaves blue	Eucalyptus carnea
35*	Juvenile leaves narrow-lanceolate	37
37	Fruit 5-6 mm diam.	Eucalyptus apothalassica
37*	Fruit 6-8 mm diam.	Eucalyptus psammitica
33*	Leaves with lateral veins acute, reticulation sparse and irregular; juvenile leaves hairy	38
38	Buds and fruit distinctly pedicellate, fruit clusters open	39
39	Leaves strongly discolorous	Eucalyptus muelleriana
39*	Leaves concolorous or weakly discolorous	40
40	Disc broad, raised	41
41	Buds acute or rostrate	42
42	Buds rostrate	43
43	Buds angular	Eucalyptus cannonii
43*	Buds not angular	Eucalyptus macrorhyncha
42*	Buds acute	44
44	Buds angular	Eucalyptus subtilior
44*	Buds not angular	Eucalyptus tindaliae
41*	Buds rounded	45
45	Buds angular	Eucalyptus prominula
45*	Buds not angular	Eucalyptus laevopinea
40*	Disc narrow, not raised	46
46	Adult leaves with length:breadth ratio of <3:1	Eucalyptus caliginosa
46*	Adult leaves with length:breadth ratio of >3:1	47
47	Adult leaves thin, noticeably discolorous	Eucalyptus eugenioides
47*	Adult leaves not thin, concolorous	Eucalyptus conjuncta
38*	Buds and fruit sessile or shortly pedicellate (pedicels obscured if present), fruit clusters crowded	48
48	Adult leaves with length:breadth ratio of >3:1	49
49	Valves small, mostly enclosed	50
50	Adult leaves with a bluish sheen	51
51	Juvenile leaves ovate (length:breadth ratio of 1.5-2:1), petiole >5 mm long	Eucalyptus agglomerata
51*	Juvenile leaves broad-lanceolate to ovate (length:breadth ratio of 2-2.5:1), petiole <5 mm long	Eucalyptus subcaerulea
50*	Adult leaves green, without a bluish sheen	52
52	Buds angular	Eucalyptus capitellata
52*	Buds not angular	53
53	Juvenile leaves broad-lanceolate to ovate	54
54	Fruit globose to flattened-globose	55
55	Adult leaves concolorous; south of the Hunter River	56
56	Fruit <7 mm diam.	Eucalyptus oblonga
56*	Fruit >7 mm diam.	Eucalyptus imitans
55*	Adult leaves slightly discolorous; north from Coffs Harbour	Eucalyptus tindaliae
54*	Fruit hemispherical	Eucalyptus cameronii
53*	Juvenile leaves narrow-lanceolate	57
57	Adult leaves mostly <6 cm long	Eucalyptus tenella
57*	Adult leaves mostly >6 cm long	58
58	Fruit hemispherical	Eucalyptus mckieana
58*	Fruit globose or flattened-globose	59
59	Adult leaves lanceolate	Eucalyptus sparsifolia
59*	Adult leaves linear to narrow-lanceolate	Eucalyptus ralla
49*	Valves large, prominently exserted	60
60	Branchlets glaucous, sharply 4-angled or winged; fruit with a medial ridge; usually mallees	Eucalyptus boliviana
60*	Branchlets not glaucous, terete or moderately 4-angled; trees	61
61	Intermediate leaves orbiculate	Eucalyptus williamsiana
61*	Intermediate leaves oblong or elliptic	62
62	Buds and adult leaves glossy green	Eucalyptus youmanii
62*	Buds and leaves ± dull, ± bluish	Eucalyptus subtilior
48*	Adult leaves with length:breadth ratio of <3:1	63
63	Disc flat, valves mostly enclosed	64
64	Buds finely warty	Eucalyptus baxteri
64*	Buds not warty	65
65	Buds angular	66
66	Juvenile leaves cordate	Eucalyptus camfieldii
66*	Juvenile leaves ovate	Eucalyptus bensonii
65*	Buds not angular	67
67	Adult leaves similifacial	Eucalyptus ligustrina
67*	Adult leaves dorsiventral	68
68	Disc thick, flat	Eucalyptus globoidea
68*	Disc thin, slightly depressed	Eucalyptus yangoura
63*	Disc raised, valves distinctly exserted	69
69	Shrubs and mallees; branchlets glaucous	Eucalyptus boliviana ms.
69*	Trees; branchlets not glaucous	Eucalyptus blaxlandii
71	Adult leaves strongly discolorous	72
72	Adult leaves closely penniveined	73
73	Buds and fruit sessile	Eucalyptus botryoides
73*	Buds and fruit pedicellate	74
74	Fruit cylindrical to urceoolate, 10-18 mm long, 6-11 mm diam.	Eucalyptus robusta
74*	Fruit conical to pyriform, 5-9 mm long, 4-6 mm diam.	Eucalyptus microcorys
72*	Adult leaves not closely penniveined	75
75	Stamens regularly inflexed	76
76	Adult leaves with some stomates on the upper surface	Eucalyptus rudderi
76*	Adult leaves with stomates on the lower surface only	77
77	Fruit ovoid, 3-5 mm long, 2-4 mm diam.	Eucalyptus hypostomatica
77*	Fruit conical to pyriform, 5-9 mm long, 4-6 mm diam.	Eucalyptus microcorys
75*	Stamens irregularly flexed	Eucalyptus rummeryi
71*	Adult leaves concolorous or weakly discolorous	78
78	Juvenile leaves opposite for many pairs	79
79	Branchlets square	80
80	Buds and fruit glaucous	Eucalyptus pyrocarpa
80*	Buds and fruit not glaucous	Eucalyptus pilularis
79*	Branchlets not square	81
81	Adult leaves broad-lanceolate to ovate	82
82	Adult leaves with 3 longitudinal veins (3-veined)	83
83	Juvenile leaves elliptic or orbiculate	Eucalyptus stellulata
83*	Juvenile leaves narrow-elliptic	Eucalyptus copulans
82*	Adult leaves with only 1 longitudinal vein (midvein)	Eucalyptus dives
81*	Adult leaves mostly lanceolate or narrower	84
84	Adult leaves green	85
85	Bark rough on branches; disc flat	86
86	Calyptra scar absent	Eucalyptus radiata
86*	Calyptra scar present	Eucalyptus aggregata
85*	Branches wholly smooth; disc raised	Eucalyptus elata
84*	Adult leaves blue	87
87	Adult leaves often >1.5 cm wide	Eucalyptus croajingolensis
87*	Adult leaves <1.5 cm wide	Eucalyptus robertsonii
78*	Juvenile leaves opposite for only a few pairs	88
88	Calyptra scar absent	89
89	Stamens regularly inflexed	90
90	Anthers adnate, dehiscing through separate slits	91
91	Fruit much longer than broad	Eucalyptus ochrophloia
91*	Fruit about as long as broad	Eucalyptus melliodora
90*	Anthers versatile, reniform, dehiscing through confluent slits	92
92	Fine peppermint bark	93
93	Fruit hemispherical	Eucalyptus andrewsii
93*	Fruit not hemispherical	94
94	Northern Tablelands species	Eucalyptus campanulata
94*	South Coast and Southern Tablelands species	Eucalyptus consideniana
92*	Coarse thick fissured or fibrous bark	95
95	Disc depressed	Eucalyptus stenostoma
95*	Disc flat	96
96	Twigs glaucous, with a peppermint smell	Eucalyptus sieberi
96*	Twigs not glaucous, with an unpleasant smell	Eucalyptus olida
89*	Stamens irregularly flexed in bud	97
97	Juvenile leaves green	98
98	Juvenile leaves hairy; fruit 13-18 mm diam.	Eucalyptus olsenii
98*	Juvenile leaves not hairy; fruit 2-10 mm diam.	99
99	Fruit with 5 or 6 valves	Eucalyptus bosistoana
99*	Fruit with 3 or 4 valves	100
100	Adult leaves >1.5 cm wide	101
101	Disc depressed	102
102	Anthers versatile, reniform, dehiscing through confluent slits	Eucalyptus obliqua
102*	Anthers adnate, dehiscing through separate slits	103
103	Adult leaves >2 cm wide; buds 5-9 mm long	Eucalyptus moluccana
103*	Adult leaves <2 cm wide; buds 4-7 mm long	Eucalyptus microcarpa
101*	Disc flat	Eucalyptus fastigata
100*	Adult leaves <1.5 cm wide	104
104	Fruit <7 m diam.	105
105	Trees	106
106	Anthers versatile, reniform, dehiscing through confluent slits	Eucalyptus paliformis
106*	Anthers adnate, dehiscing through separate slits	Eucalyptus pilligaensis
105*	Mallees	107
107	Adult leaves <1.0 cm wide	Eucalyptus viridis
107*	Adult leaves >1.0 cm wide	Eucalyptus porosa
104*	Fruit >7 mm diam.	108
108	Inflorescences 3-flowered	Eucalyptus triflora
108*	Inflorescences 7-flowered	109
109	Fruit urceolate	Eucalyptus fraxinoides
109	Fruit globose	Eucalyptus dendromorpha
97*	Juvenile leaves blue	110
110	Disc flat	Eucalyptus oreades
110*	Disc depressed	111
111	Buds rounded; fruit >8 mm diam.	112
112	Anthers versatile, reniform, dehiscing through confluent slits	Eucalyptus delegatensis
112*	Anthers adnate, dehiscing through separate slits	Eucalyptus albens
111*	Buds acute; fruit <8 mm diam.	113
113	Anthers versatile, reniform, dehiscing through confluent slits	Eucalyptus piperita
113*	Anthers adnate, dehiscing through separate slits	Eucalyptus polybractea
88*	Calyptra scar present	114
114	Stamens regularly inflexed	115
115	Adult leaves broad-lanceolate to ovate or elliptic	116
116	Fruit at least 6 mm long and 6 mm diam.	Eucalyptus magnificata
116*	Fruit usually <6 mm long and 6 mm diam.	117
117	Adult leaves without loose white surface wax; coastal species	Eucalyptus baueriana
117*	Adult leaves glaucous with loose white surface wax; tablelands and Western Slopes species	Eucalyptus polyanthemos
115*	Adult leaves linear to lanceolate, occasionally broad-lanceolate	118
118	Inflorescences 3-flowered	Eucalyptus longifolia
118*	Inflorescences >3-flowered	119
119	Trees	120
120	Fruit hemispherical to ovoid	121
121	Outer stamens infertile	Eucalyptus rudderi
121*	All stamens fertile	Eucalyptus intertexta
120*	Fruit conical	Eucalyptus conica
119*	Mallees	122
122	Pith glands present	Eucalyptus costata
122*	Pith glands absent	123
123	Disc broad, slightly depressed	Eucalyptus leptophylla
123*	Disc narrow, steeply depressed	124
124	Fruit 4-angled	Eucalyptus calycogona
124*	Fruit smooth	Eucalyptus gracilis
114*	Stamens irregularly flexed	125
125	Buds and twigs glaucous	Eucalyptus nortonii
125*	Buds and twigs non-glaucous	126
126	Adult leaves narrow-lanceolate to lanceolate	127
127	Fruit <5 mm diam.	128
128	Anthers adnate	129
129	Juvenile leaves broad-lanceolate (coastal forest tree)	Eucalyptus largeana
129*	Juvenile leaves linear (far inland woodland tree)	Eucalyptus largiflorens
128*	Anthers versatile	130
130	Fruit hemispherical; adult leaves dull	Eucalyptus acaciiformis
130*	Fruit conical; adult leaves glossy	Eucalyptus aggregata
127*	Fruit >5 mm diam.	131
131	Fruit sessile	Eucalyptus goniocalyx
131*	Fruit pedicellate	132
132	Juvenile leaves green	Eucalyptus retinens
132*	Juvenile leaves glaucous	Eucalyptus volcanica
126*	Adult leaves broad-lanceolate to ovate or ± elliptic, rarely lanceolate	133
133	Trees	134
134	Anthers adnate	Eucalyptus populnea
134*	Anthers versatile	Eucalyptus ovata
133*	Mallees	Eucalyptus behriana
135	Adult leaves strongly discolorous	136
136	Fruit >10 mm diam.	Eucalyptus scias
136*	Fruit <10 mm diam.	137
137	Calyptra about as long as hypanthium	Eucalyptus notabilis
137*	Calyptra much longer than hypanthium	Eucalyptus resinifera
135*	Adult leaves concolorous	138
138	Fruit sessile	139
139	Inflorescences 3-flowered	140
140	Adult leaves opposite	141
141	Fruit conical	Eucalyptus cinerea
141*	Fruit campanulate	Eucalyptus triplex
140*	Adult leaves disjunct	142
142	Juvenile leaves green	Eucalyptus badjensis
142*	Juvenile leaves grey or blue	143
143	Fruit ovoid	Eucalyptus chapmaniana
143*	Fruit campanulate	144
144	Branches smooth	Eucalyptus kartzoffiana
144*	Branches with persistent fibrous bark	Eucalyptus alligatrix
139*	Inflorescences 7- or more-flowered	145
145	Peduncle <3 mm long	Eucalyptus banksii
145*	Peduncle >3 mm long	146
146	Fruit >6 mm diam.	147
147	Adult leaves blue	148
148	Many adult leaves opposite	Eucalyptus conspicua
148*	Adult leaves disjunct	Eucalyptus nortonii
147*	Adult leaves green	Eucalyptus goniocalyx
146*	Fruit <6 mm diam.	149
149	Valves acute	Eucalyptus quadrangulata
149*	Valves obtuse	Eucalyptus macarthurii
138*	Fruit pedicellate	150
150	Calyptra >1.5 times as long as hypanthium	151
151	Disc raised	152
152	Inflorescences 3-flowered	Eucalyptus morrisii
152*	Inflorescences 7-flowered	Eucalyptus exserta
151*	Disc not raised	153
153	Disc flat	Eucalyptus bakeri
153*	Disc sharply depressed	154
154	Mallees; inflorescences solitary	155
155	Adult leaves opposite, ovate to broad-lanceolate or elliptic	Eucalyptus gillii
155*	Adult leaves disjunct, lanceolate to broad-lanceolate	Eucalyptus socialis
154*	Trees; inflorescences often paired	Eucalyptus squamosa
150*	Calyptra equal in length to hypanthium	156
156	Inflorescences compound	Eucalyptus coolabah
156*	Inflorescences simple	157
157	Inflorescences often paired	158
158	Calyptra scar present	Eucalyptus squamosa
158*	Calyptra scar absent	Eucalyptus fastigata
157*	Inflorescences solitary	159
159	Juvenile leaves linear	160
160	Disc level or raised	161
161	Bark shedding from bases of larger branches	Eucalyptus smithii
161*	Bark persisting to smaller branches	162
162	Adult leaves mostly >1 cm wide	Eucalyptus corticosa
162*	Adult leaves mostly <1 cm wide	Eucalyptus nicholii
160*	Disc steeply depressed	Eucalyptus oleosa
159*	Juvenile leaves broad-lanceolate or broader	163
163	Buds glaucous	164
164	Fruit 6-8 mm diam.	Eucalyptus malacoxylon
164*	Fruit 4-5 mm diam.	Eucalyptus nova-anglica
163*	Buds not glaucous	165
165	Juvenile leaves green	166
166	Fruit >5 mm diam.	Eucalyptus angophoroides
166*	Fruit <5 mm diam.	167
167	Fruit conical	Eucalyptus aggregata
167*	Fruit hemispherical or rounded	Eucalyptus acaciiformis
165*	Juvenile leaves blue	168
168	Juvenile leaves orbiculate	169
169	Fruit >5 mm long	Eucalyptus bridgesiana
169*	Fruit <5 mm long	Eucalyptus nova-anglica
168*	Juvenile leaves narrow-elliptic	Eucalyptus ignorabilis
171	Inflorescences compound	172
172	Fruit conical or ovoid	173
173	Stamens regularly inflexed, outer whorls infertile	Eucalyptus polyanthemos
173*	Stamens irregularly flexed, all fertile	Eucalyptus dawsonii
172*	Fruit hemispherical	Eucalyptus michaeliana
171*	Inflorescences simple	174
174	Fruit sessile	175
175	Inflorescences 3-flowered	176
176	Adult leaves often opposite	177
177	Opposite pairs of juvenile leaves fused at base	Eucalyptus perriniana
177*	Juvenile leaves free	178
178	Adult leaves <10 mm wide	Eucalyptus recurva
178*	Adult leaves >10 mm wide	Eucalyptus pulverulenta
176*	Adult leaves disjunct	179
179	Fruit cylindrical or ovoid, disc flat or depressed; juvenile leaves	Eucalyptus glaucescens
179*	Fruit campanulate, disc slightly raised; juvenile leaves <4 cm long and wide	Eucalyptus saxatilis
175*	Inflorescences 7-flowered or more	180
180	Trees	181
181	Calyptra scar present	Eucalyptus nitens
181*	Calyptra scar absent	182
182	Buds in stellate clusters	183
183	Juvenile leaves elliptic or orbiculate	Eucalyptus stellulata
183*	Juvenile leaves narrow-elliptic	Eucalyptus copulans
182*	Buds not in stellate clusters	184
184	Adult leaf venation subparallel	185
185	Fruit angular	Eucalyptus debeuzevillei
185*	Fruit not angular	Eucalyptus niphophila
184*	Adult leaves with a distinct midrib	186
186	Fruit broader than long; juvenile leaves green	Eucalyptus kybeanensis
186*	Fruit longer than broad; juvenile leaves blue	Eucalyptus oreades
180*	Mallee	187
187	Adult leaves often opposite	Eucalyptus sturgissiana
187*	Adult leaves disjunct	188
188	Buds in stellate clusters	189
189	Juvenile leaves ovate to elliptic	Eucalyptus latiuscula
189**	Juvenile leaves linear to lanceolate	190
190	Juvenile leaves lanceolate, adult leaves often >1 cm wide	Eucalyptus dissita
190*	Juvenile leaves linear to narrow-lanceolate, adult leaves <1 cm wide	191
191	Adult leaves <6 cm long	Eucalyptus moorei
191*	Adult leaves often >6 cm long	Eucalyptus serpentinicola
188*	Buds not in stellate clusters	192
192	Calyptra scar absent	Eucalyptus kybeanensis
192*	Calyptra scar present	Eucalyptus dumosa
174*	Fruit pedicellate	193
193	Venation in adult leaves subparallel	194
194	Mallees; leaves lanceolate or narrower	Eucalyptus gregsoniana
194*	Trees; leaves lanceolate to ovate	195
195	Internodes often >3 cm long	Eucalyptus lacrimans
195*	Internodes <3 cm long	196
196	Buds strongly glaucous	Eucalyptus niphophila
196*	Buds not strongly glaucous	Eucalyptus pauciflora
193*	Venation in adult leaves not subparallel	197
197	Mallees	198
198	Adult leaves >1.5 cm wide	199
199	Adult leaves with lateral veins strongly acute (<30? to midrib)	Eucalyptus multicaulis
199*	Adult leaves with lateral veins 30-50? to midrib	200
200	Disc flat	Eucalyptus luehmanniana
200*	Disc depressed	201
201	Buds glaucous	Eucalyptus stenostoma
201*	Buds not glaucous	202
202	Twigs winged	Eucalyptus langleyi
202*	Twigs not winged	203
203	Juvenile leaves dull, subglaucous; adult leaves to 3.5 cm wide	Eucalyptus burgessiana
203*	Juvenile leaves glossy green; adult leaves to 2.5 cm wide	204
204	Fruit 8-11 mm diam.	Eucalyptus obstans
204*	Fruit 3-5 mm diam.	Eucalyptus aenea
198*	Adult leaves <1.5 cm wide	205
205	Disc flat	206
206	Disc broad	Eucalyptus codonocarpa
206*	Disc narrow	207
207	Leaves thick	Eucalyptus approximans
207*	Leaves thin	Eucalyptus microcodon
205*	Disc depressed	208
208	Adult leaves <8 mm wide	209
209	Immature adult leaves pinkish grey; longest peduncles <8 mm long	Eucalyptus cunninghamii
209*	Immature adult leaves green; longest peduncles >8 mm long	210
210	Largest fruit >8 mm diam.; leaves usually <9 cm long, if longer then >7 mm wide	Eucalyptus laophila
210*	Largest fruit <8 mm diam.; longest leaves >9 cm long and <7 mm wide	Eucalyptus apiculata
208*	Adult leaves often >8 mm wide	211
211	Fruit 3-5 mm diam.	Eucalyptus aenea
211*	Fruit 6-11 mm diam.	212
212	Adult leaves <10 mm wide	Eucalyptus stricta
212*	Adult leaves >10 mm wide	Eucalyptus spectatrix
197*	Trees	213
213	Calyptra scar absent	214
214	Disc flat	215
215	Adult leaves dull	216
216	Tablelands and Western Slopes species	Eucalyptus rossii
216*	Coastal species	217
217	Adult leaves <1.8 cm wide	Eucalyptus racemosa
217*	Adult leaves >1.9 cm wide	Eucalyptus signata
215*	Adult leaves glossy	218
218	Fruit >7 mm diam.	Eucalyptus haemastoma
218*	Fruit <7 mm diam.	219
219	Coastal species north from Morisset	Eucalyptus signata
219*	Sydney region, Blue Mtns and south	Eucalyptus sclerophylla
214*	Disc not flat	220
220	Fruit large (13-18 mm diam.), ribbed	Eucalyptus olsenii
220*	Fruit small (4-10 mm diam.), not ribbed	221
221	Anthers versatile, reniform, dehiscing through confluent slits	Eucalyptus paliformis
221*	Anthers adnate, dehiscing through separate slits	222
222	Inflorescences 3-flowered	Eucalyptus leucoxylon
222*	Inflorescences 7-flowered	Eucalyptus melliodora
213*	Calyptra scar present	223
223	Juvenile leaves opposite for few pairs	Eucalyptus ovata
223*	Juvenile leaves opposite for many pairs	224
224	Buds rounded, outer calyptra not shedding cleanly	Eucalyptus benthamii
224*	Buds pointed, outer calyptra shedding cleanly	225
225	Inflorescences 3-flowered	Eucalyptus wilcoxii
225*	Inflorescences 7-flowered	226
226	Fruit >5 mm diam.	227
227	Buds 4-5 mm diam.	Eucalyptus cypellocarpa
227*	Buds 2.5-3.5 mm diam.	Eucalyptus oresbia
226*	Fruit <5 mm diam.	Eucalyptus dorrigoensis
228	Calyptra >1.5 times as long as hypanthium	229
229	Buds glaucous	230
230	Disc domed, >1.5 mm wide	Eucalyptus glaucina
230*	Disc ± flat, <1.5 mm wide	231
231	Calyptra cylindrical	Eucalyptus prava
231*	Calyptra conical	Eucalyptus dealbata
229*	Buds not glaucous	232
232	Calyptra cylindrical	Eucalyptus bancroftii
232*	Calyptra conical or rostrate	233
233	Calyptra rostrate	Eucalyptus camaldulensis
233*	Calyptra conical	234
234	Calyptra >2.5 times as long as hypanthium	235
235	Inflorescences >7-flowered	Eucalyptus amplifolia
235*	Inflorescences 7-flowered	236
236	Seeds black	237
237	Fruit >6 mm in diam.	Eucalyptus tereticornis
237*	Fruit <6 mm in diam.	Eucalyptus blakelyi
236	Seeds red	238
238	Fruit >5 mm long, adult leaves lanceolate	Eucalyptus interstans
238*	Fruit <5 mm long, adult leaves narrow-lanceolate	Eucalyptus seeana
234*	Calyptra 1.5-2 times as long as hypanthium	239
239	Juvenile leaves ovate to orbiculate	240
240	Mallees	241
241	Adult leaves penniveined, glossy; coastal species	Eucalyptus pumila
241*	Adult leaves with open venation, dull; inland plains species	Eucalyptus vicina
240*	Trees	Eucalyptus chloroclada
239*	Juvenile leaves narrow-lanceolate to lanceolate	242
242	Trees; seeds red	Eucalyptus parramattensis
242*	Mallees; seeds black	243
243	Fruit >5 mm diam.	Eucalyptus dwyeri
243*	Fruit <5 mm diam.	Eucalyptus nandewarica
228*	Calyptra <1.5 times as long as hypanthium	244
244	Inflorescences 3-flowered	245
245	Fruit >10 mm diam.	246
246	Peduncles >3 mm long	Eucalyptus pseudoglobulus
246*	Peduncles <3 mm long	Eucalyptus bicostata
245*	Fruit <10 mm diam.	247
247	Juvenile leaves broad lanceolate to ovate, to orbiculate or elliptic	248
248	Buds glaucous	249
249	Juvenile stems rounded	Eucalyptus rubida
249*	Juvenile stems markedly quadrangular	Eucalyptus canobolensis
248*	Buds not glaucous	250
250	Juvenile leaves grey	Eucalyptus dalrympleana
250*	Juvenile leaves green	251
251	Calyptra as wide as hypanthium	Eucalyptus imlayensis
251*	Calyptra narrower than hypanthium	Eucalyptus baeuerlenii
247*	Juvenile leaves lanceolate	252
252	Calyptra narrower than hypanthium	Eucalyptus wilcoxii
252*	Calyptra as wide as hypanthium	Eucalyptus viminalis
244*	Inflorescences 7- or more-flowered	253
253	Adult leaves discolorous	254
254	Disc raised or ± level	255
255	Fruit >10 mm diam.	Eucalyptus canaliculata
255*	Fruit <10 mm diam.	256
256	Valves apiculate, vertically raised	Eucalyptus major
256*	Valves obtuse, incurved	257
257	Fruit <6 mm diam.	Eucalyptus propinqua
257*	Fruit 6-10 mm diam.	258
258	Calyptra narrower than hypanthium	Eucalyptus biturbinata
258*	Calyptra as wide as hypanthium	Eucalyptus punctata
254*	Disc depressed	259
259	Buds glaucous, valves broad-triangular, incurved	Eucalyptus grandis
259*	Buds not glaucous	260
260	Adult leaves lanceolate; valves narrow-acuminate	Eucalyptus saligna
260*	Adult leaves broad-lanceolate or broader; valves triangular, acute	261
261	Calyptra rounded, pedicels <4 mm long	Eucalyptus brunnea
261*	Calyptra pointed, pedicels >4 mm long	Eucalyptus deanei
253*	Adult leaves concolorous	262
262	Adult leaves often opposite, <3 cm long	Eucalyptus parvula
262*	Adult leaves disjunct, >3 cm long	263
263	Inflorescences usually paired in leaf axils	Eucalyptus pachycalyx
263*	Inflorescences solitary in leaf axils	264
264	Adult leaves broad-lanceolate or broader	265
265	Adult leaves rounded or mucronate	266
266	Petioles 6-11 mm long; adult leaves 1.2-3.5 cm wide; peduncles 3-9 mm long	Eucalyptus aquatica
266*	Petioles 10-20 mm long; adult leaves 3.0-5.0 mm wide; peduncles 10-18 mm long	Eucalyptus camphora
265*	Adult leaves acute	Eucalyptus ovata
264*	Adult leaves lanceolate or narrower	267
267	Bark shed in long ribbons	268
268	Juvenile leaves ovate or broader	269
269	Buds glaucous	270
270	Calyptra finely warty, apiculate	Eucalyptus maidenii
270*	Calyptra smooth, not apiculate	Eucalyptus rubida
269*	Buds not glaucous	271
271	Adult leaves apparently finely toothed; outer calyptra not shedding cleanly	Eucalyptus denticulata
271*	Adult leaves entire; outer calyptra shedding cleanly	Eucalyptus dalrympleana
268*	Juvenile leaves lanceolate	272
272	Calyptra scar present	273
273	Buds 4-7 mm long; pedicels 1-4 mm long	Eucalyptus nobilis
273*	Buds 9-13 mm long; pedicels <2 mm long	Eucalyptus quinniorum
272*	Calyptra scar absent	274
274	Calyptra hemispherical	Eucalyptus kybeanensis
274*	Calyptra conical, acute	Eucalyptus deuaensis
267*	Bark shed in scales	275
275	Juvenile leaves linear or lanceolate	276
276	Trees	277
277	Bark irregularly shedding, patchy, not powdery	Eucalyptus parramattensis
277*	Bark clean or lightly mottled, powdery	Eucalyptus mannifera
276*	Mallees	278
278	Fruit >5 mm diam.	Eucalyptus dwyeri
278*	Fruit <5 mm diam.	Eucalyptus nandewarica
275*	Juvenile leaves broad lanceolate to ovate, elliptic or orbiculate	279
279	Mallees	280
280	Adult leaves penniveined, glossy; coastal species	Eucalyptus pumila
280*	Adult leaves with open venation, dull; inland plains species	Eucalyptus vicina
279*	Trees	281
281	Juvenile leaves disjunct	Eucalyptus chloroclada
281*	Juvenile leaves opposite for >10 nodes	282
282	Juvenile leaves not crenate	283
283	Fruit <5 mm long and <5 mm in diam.	284
285	Buds acute; outer calyptra shedding cleanly	Eucalyptus dorrigoensis
284*	Buds rounded; outer calyptra not shedding cleanly	Eucalyptus benthamii
283*	Fruit 5 mm long and 5 mm in diam. or more	285
285	Fruit 5-6 mm long	Eucalyptus praecox
285*	Fruit 6-8 mm long	Eucalyptus elliptica
282*	Juvenile leaves crenate, remaining opposite for several years	Eucalyptus dunnii

	Compiled and edited by staff of the National Herbarium of New South Wales
	© 1999 – 2009 Royal Botanic Gardens & Domain Trust, Sydney Australia

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