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.
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).
| Key to the species | |
1 | Bark rough, persistent over entire trunk | 2 |
| Bark smooth on trunk | 172 |
2 | Ironbarks | 3 |
| Bark not ironbark Back to 1 | 27 |
3 | Stamens with filaments regularly inflexed, anthers cuboid | 4 |
| Stamens with filaments irregularly flexed, anthers globose Back to 2 | 17 |
4 | Adult leaves strongly discolorous | 5 |
| Adult leaves concolorous or weakly discolorous Back to 3 | 6 |
5 | Fruit 4-angled | Eucalyptus fergusonii |
| Fruit not angled Back to 4 | Eucalyptus paniculata |
6 | Calyptra scar present | 7 |
| No calyptra scar present Back to 4 | 16 |
7 | Adult leaves glossy | 8 |
| Adult leaves dull Back to 6 | 9 |
8 | Longest petioles <20 mm long, largest adult leaves <15 cm long | Eucalyptus placita |
| Longest petioles >20 mm long, largest adult leaves >15 cm long Back to 7 | Eucalyptus ancophila |
9 | Adult leaves <1.2 cm wide | Eucalyptus beyeriana |
| Adult leaves >1.2 cm wide Back to 7 | 10 |
10 | Adult leaves green or grey-green | 11 |
| Adult leaves glaucous Back to 9 | 14 |
11 | Fruit 4-angled | Eucalyptus tetrapleura |
| Fruit not angled Back to 10 | 12 |
12 | Juvenile leaves glossy green | Eucalyptus ancophila |
| Juvenile leaves dull, grey-green Back to 11 | 13 |
13 | Juvenile leaves lanceolate, 15–20 cm long | Eucalyptus fusiformis |
| Juvenile leaves narrow-elliptic to elliptic, 3.5–9 cm long Back to 12 | Eucalyptus scopulorum |
14 | Fruit longer than broad; adult leaves acute | 15 |
| Fruit shorter than broad; adult leaves rounded Back to 10 | Eucalyptus panda |
15 | Adult leaves broad-lanceolate to ovate | Eucalyptus caleyi |
| Adult leaves narrow-lanceolate to lanceolate Back to 14 | Eucalyptus fusiformis |
16 | Inflorescences 3-flowered | Eucalyptus tricarpa |
| Inflorescences >3-flowered Back to 6 | Eucalyptus sideroxylon |
17 | Adult leaves opposite, ovate to orbiculate | Eucalyptus melanophloia |
| Adult leaves disjunct, broad-lanceolate or narrow-lanceolate Back to 3 | 18 |
18 | Valves distinctly exserted (only weakly exserted in E. calidissima | 19 |
| Valves not distinctly exserted Back to 17 | 23 |
19 | Buds not glaucous | 20 |
| Buds glaucous Back to 18 | 22 |
20 | Calyptra more than twice as long as hypanthium | Eucalyptus fibrosa |
| Calyptra less than twice as long as hypanthium Back to 19 | 21 |
21 | Disc flat | Eucalyptus ophitica |
| Disc depressed Back to 20 | Eucalyptus siderophloia |
22 | Hypanthium 4-ribbed, calyptra shorter than hypanthium | Eucalyptus calidissima |
| : Hypanthium not ribbed; calyptra as long or much longer than hypanthium Back to 19 | Eucalyptus nubilis |
23 | Calyptra conical, acute; juvenile leaves orbiculate to broad-lanceolate | 24 |
| Calyptra rounded or obtuse; juvenile leaves linear to narrow-lanceolate Back to 18 | 26 |
24 | Buds glaucous | Eucalyptus nubilis |
| Buds not glaucous Back to 23 | 25 |
25 | Juvenile leaves broad-lanceolate to ovate, apex acute or obtuse | Eucalyptus siderophloia |
| Juvenile leaves orbiculate, apex rounded Back to 24 | Eucalyptus fracta |
26 | Fruit 2–4 mm diameter, juvenile leaves linear to lanceolate | Eucalyptus crebra |
| Fruit 7–9 mm diameter, juvenile leaves ovate to broad-lanceolateEucalyptus calidissima Back to 23 | |
27 | Stringybarks | 28 |
| Not stringybarks Back to 2 | 72 |
28 | Fruit pyriform to conical, flat-topped; inflorescences aggregated or paired | 29 |
| Fruit not as above; inflorescences usually solitary Back to 27 | 30 |
29 | Inflorescences axillary, often paired; calyptra scar absent | Eucalyptus fastigata |
| Inflorescences aggregated at shoot tips; calyptra scar present Back to 28 | Eucalyptus microcorys |
30 | Fruit ovoid to urceolate and disc strongly depressed | 31 |
| Fruit hemispherical to globose or ovoid; if ovoid then disc not strongly depressed Back to 28 | 35 |
31 | Fruit smooth | 32 |
| Fruit ribbed Back to 30 | Eucalyptus planchoniana |
32 | Adult leaves concolorous | Eucalyptus obliqua |
| Adult leaves strongly discolorous Back to 31 | 33 |
33 | Fruit 4-lobed at top | Eucalyptus baileyana |
| Fruit not 4-lobed at top Back to 32 | 34 |
34 | Buds and fruit sessile | Eucalyptus botryoides |
| Buds and fruit pedicellate Back to 33 | Eucalyptus robusta |
35 | Leaves with lateral veins obtuse, reticulation dense and regular, juvenile leaves glabrous | 36 |
| Leaves with lateral veins acute, reticulation sparse and irregular; juvenile leaves hairy Back to 30 | 40 |
36 | Adult leaves strongly discolorous | Eucalyptus acmenoides |
| Adult leaves not strongly discolorous Back to 35 | 37 |
37 | Juvenile leaves broad-lanceolate to ovate | 38 |
| Juvenile leaves narrow-lanceolate Back to 36 | 39 |
38 | Adult leaves green | Eucalyptus umbra |
| Adult leaves blue Back to 37 | Eucalyptus carnea |
39 | Fruit 5–6 mm diam. | Eucalyptus apothalassica |
| Fruit 6–8 mm diam. Back to 37 | Eucalyptus psammitica |
40 | Buds and fruit distinctly pedicellate, fruit clusters open | 41 |
| Buds and fruit sessile or shortly pedicellate (pedicels obscured if present), fruit clusters crowded Back to 35 | 50 |
41 | Leaves strongly discolorous | Eucalyptus muelleriana |
| Leaves concolorous or weakly discolorous Back to 40 | 42 |
42 | Disc broad, raised | 43 |
| Disc narrow, not raised Back to 41 | 48 |
43 | Buds acute or rostrate | 44 |
| Buds rounded Back to 42 | 47 |
44 | Buds rostrate | 45 |
| Buds acute Back to 43 | 46 |
45 | Buds angular | Eucalyptus cannonii |
| Buds not angular Back to 44 | Eucalyptus macrorhyncha |
46 | Buds angular | Eucalyptus subtilior |
| Buds not angular Back to 44 | Eucalyptus tindaliae |
47 | Buds angular | Eucalyptus prominula |
| Buds not angular Back to 43 | Eucalyptus laevopinea |
48 | Adult leaves with length:breadth ratio of <3:1 | Eucalyptus caliginosa |
| Adult leaves with length:breadth ratio of >3:1 Back to 42 | 49 |
49 | Adult leaves thin, noticeably discolorous | Eucalyptus eugenioides |
| Adult leaves not thin, concolorous Back to 48 | Eucalyptus conjuncta |
50 | Adult leaves with length:breadth ratio of >3:1 | 51 |
| Adult leaves with length:breadth ratio of <3:1 Back to 40 | 65 |
51 | Valves small, mostly enclosed | 52 |
| Valves large, prominently exserted Back to 50 | 62 |
52 | Adult leaves with a bluish sheen | 53 |
| Adult leaves green, without a bluish sheen Back to 51 | 54 |
53 | Juvenile leaves ovate (length:breadth ratio of 1.5–2:1), petiole >5 mm long | Eucalyptus agglomerata |
| Juvenile leaves broad-lanceolate to ovate (length:breadth ratio of 2–2.5:1), petiole <5 mm long Back to 52 | Eucalyptus subcaerulea |
54 | Buds angular | Eucalyptus capitellata |
| Buds not angular Back to 52 | 55 |
55 | Juvenile leaves broad-lanceolate to ovate | 56 |
| Juvenile leaves narrow-lanceolate Back to 54 | 59 |
56 | Fruit globose to flattened-globose | 57 |
| Fruit hemispherical Back to 55 | Eucalyptus cameronii |
57 | Adult leaves concolorous; south of the Hunter River | 58 |
| Adult leaves slightly discolorous; north from Coffs Harbour Back to 56 | Eucalyptus tindaliae |
58 | Fruit <7 mm diam. | Eucalyptus oblonga |
| Fruit >7 mm diam. Back to 57 | Eucalyptus imitans |
59 | Adult leaves mostly <6 cm long | Eucalyptus tenella |
| Adult leaves mostly >6 cm long Back to 55 | 60 |
59 | Fruit hemispherical | Eucalyptus mckieana |
| Fruit globose or flattened-globose Back to 59 | 61 |
61 | Adult leaves lanceolate | Eucalyptus sparsifolia |
| Adult leaves linear to narrow-lanceolate Back to 60 | Eucalyptus ralla |
62 | Branchlets glaucous, sharply 4-angled or winged; fruit with a medial ridge; usually mallees | Eucalyptus boliviana |
| Branchlets not glaucous, terete or moderately 4-angled; trees Back to 51 | 63 |
63 | Intermediate leaves orbiculate | Eucalyptus williamsiana |
| Intermediate leaves oblong or elliptic Back to 62 | 64 |
64 | Buds and adult leaves glossy green | Eucalyptus youmanii |
| Buds and leaves ± dull, ± bluish Back to 63 | Eucalyptus subtilior |
65 | Disc flat, valves mostly enclosed | 66 |
| Disc raised, valves distinctly exserted Back to 50 | 71 |
66 | Buds finely warty | Eucalyptus baxteri |
| Buds not warty Back to 65 | 67 |
67 | Buds angular | 68 |
| Buds not angular Back to 66 | 69 |
68 | Juvenile leaves cordate | Eucalyptus camfieldii |
| Juvenile leaves ovate Back to 67 | Eucalyptus bensonii |
69 | Adult leaves similifacial | Eucalyptus ligustrina |
| Adult leaves dorsiventral Back to 67 | 70 |
70 | Disc thick, flat | Eucalyptus globoidea |
| Disc thin, slightly depressed Back to 69 | Eucalyptus yangoura |
71 | Shrubs and mallees; branchlets glaucous | Eucalyptus boliviana |
| Trees; branchlets not glaucous Back to 65 | Eucalyptus blaxlandii |
72 | Valves of fruit enclosed | 73 |
| Valves of fruit exserted Back to 27 | 137 |
73 | Adult leaves strongly discolorous | 74 |
| Adult leaves concolorous or weakly discolorous Back to 72 | 80 |
74 | Adult leaves closely penniveined | 75 |
| Adult leaves not closely penniveined Back to 73 | 77 |
75 | Buds and fruit sessile | Eucalyptus botryoides |
| Buds and fruit pedicellate Back to 74 | 76 |
76 | Fruit cylindrical to urceoolate, 10–18 mm long, 6–11 mm diam. | Eucalyptus robusta |
| Fruit conical to pyriform, 5–9 mm long, 4–6 mm diam. Back to 75 | Eucalyptus microcorys |
77 | Stamens regularly inflexed | 78 |
| Stamens irregularly flexed Back to 74 | Eucalyptus rummeryi |
78 | Adult leaves with some stomates on the upper surface | Eucalyptus rudderi |
| Adult leaves with stomates on the lower surface only Back to 77 | 79 |
79 | Fruit ovoid, 3–5 mm long, 2–4 mm diam. | Eucalyptus hypostomatica |
| Fruit conical to pyriform, 5–9 mm long, 4–6 mm diam. Back to 78 | Eucalyptus microcorys |
80 | Juvenile leaves opposite for many pairs | 81 |
| Juvenile leaves opposite for only a few pairs Back to 73 | 90 |
81 | Branchlets square | 82 |
| Branchlets not square Back to 80 | 83 |
82 | Buds and fruit glaucous | Eucalyptus pyrocarpa |
| Buds and fruit not glaucous Back to 81 | Eucalyptus pilularis |
83 | Adult leaves broad-lanceolate to ovate | 84 |
| Adult leaves mostly lanceolate or narrower Back to 81 | 86 |
84 | Adult leaves with 3 longitudinal veins (3-veined) | 85 |
| Adult leaves with only 1 longitudinal vein (midvein) Back to 83 | Eucalyptus dives |
85 | Juvenile leaves elliptic or orbiculate | Eucalyptus stellulata |
| Juvenile leaves narrow-elliptic Back to 84 | Eucalyptus copulans |
86 | Adult leaves green | 87 |
| Adult leaves blue Back to 83 | 89 |
87 | Bark rough on branches; disc flat | 88 |
| Branches wholly smooth; disc depressed Back to 86 | Eucalyptus elata |
88 | Calyptra scar absent | Eucalyptus radiata |
| Calyptra scar present Back to 87 | Eucalyptus aggregata |
89 | Adult leaves often >1.5 cm wide | Eucalyptus croajingolensis |
| Adult leaves <1.5 cm wide Back to 86 | Eucalyptus robertsonii |
90 | Calyptra scar absent | 91 |
| Calyptra scar present Back to 80 | 116 |
91 | Stamens regularly inflexed | 92 |
| Stamens irregularly flexed in bud Back to 90 | 99 |
92 | Anthers adnate, dehiscing through separate slits | 93 |
| Anthers versatile, reniform, dehiscing through confluent slits Back to 91 | 94 |
93 | Fruit much longer than broad | Eucalyptus ochrophloia |
| Fruit about as long as broad Back to 92 | Eucalyptus melliodora |
94 | Fine peppermint bark | 95 |
| Coarse thick fissured or fibrous bark Back to 92 | 97 |
95 | Fruit hemispherical | Eucalyptus andrewsii |
| Fruit not hemispherical Back to 94 | 96 |
96 | Northern Tablelands species | Eucalyptus campanulata |
| South Coast and Southern Tablelands species Back to 95 | Eucalyptus consideniana |
97 | Disc depressed | Eucalyptus stenostoma |
| Disc flat Back to 94 | 98 |
98 | Twigs glaucous, with a peppermint smell | Eucalyptus sieberi |
| Twigs not glaucous, with an unpleasant smell Back to 97 | Eucalyptus olida |
99 | Juvenile leaves green | 100 |
| Juvenile leaves blue Back to 91 | 112 |
100 | Juvenile leaves hairy; fruit 13–18 mm diam. | Eucalyptus olsenii |
| Juvenile leaves not hairy; fruit 2–10 mm diam. Back to 99 | 101 |
101 | Fruit with 5 or 6 valves | Eucalyptus bosistoana |
| Fruit with 3 or 4 valves Back to 100 | 102 |
102 | Adult leaves >1.5 cm wide | 103 |
| Adult leaves <1.5 cm wide Back to 101 | 106 |
103 | Disc depressed | 104 |
| Disc flat Back to 102 | Eucalyptus fastigata |
104 | Anthers versatile, reniform, dehiscing through confluent slits | Eucalyptus obliqua |
| Anthers adnate, dehiscing through separate slits Back to 103 | 105 |
105 | Adult leaves >2 cm wide; buds 5–9 mm long | Eucalyptus moluccana |
| Adult leaves <2 cm wide; buds 4–7 mm long Back to 104 | Eucalyptus microcarpa |
106 | Fruit <7 m diam. | 107 |
| Fruit >7 mm diam. Back to 102 | 110 |
107 | Trees | 108 |
| Mallees Back to 106 | 109 |
108 | Anthers versatile, reniform, dehiscing through confluent slits | Eucalyptus paliformis |
| Anthers adnate, dehiscing through separate slits Back to 107 | Eucalyptus pilligaensis |
109 | Adult leaves <1.0 cm wide | Eucalyptus viridis |
| Adult leaves >1.0 cm wide Back to 107 | Eucalyptus porosa |
110 | Inflorescences 3-flowered | Eucalyptus triflora |
| Inflorescences 7-flowered Back to 106 | 111 |
111 | Fruit urceolate | Eucalyptus fraxinoides |
| Fruit globose Back to 110 | Eucalyptus dendromorpha |
112 | Disc flat | Eucalyptus oreades |
| Disc depressed Back to 99 | 113 |
113 | Buds rounded; fruit >8 mm diam. | 114 |
| Buds acute; fruit <8 mm diam. Back to 112 | 115 |
114 | Anthers versatile, reniform, dehiscing through confluent slits | Eucalyptus delegatensis |
| Anthers adnate, dehiscing through separate slits Back to 113 | Eucalyptus albens |
115 | Anthers versatile, reniform, dehiscing through confluent slits | Eucalyptus piperita |
| Anthers adnate, dehiscing through separate slits Back to 113 | Eucalyptus polybractea |
116 | Stamens regularly inflexed | 117 |
| Stamens irregularly flexed Back to 90 | 127 |
117 | Adult leaves broad-lanceolate to ovate or elliptic | 118 |
| Adult leaves linear to lanceolate, occasionally broad-lanceolate Back to 116 | 120 |
118 | Fruit at least 6 mm long and 6 mm diam. | Eucalyptus magnificata |
| Fruit usually <6 mm long and 6 mm diam. Back to 117 | 119 |
119 | Adult leaves without loose white surface wax; coastal species | Eucalyptus baueriana |
| Adult leaves glaucous with loose white surface wax; tablelands and Western Slopes species Back to 118 | Eucalyptus polyanthemos |
120 | Inflorescences 3-flowered | Eucalyptus longifolia |
| Inflorescences >3-flowered Back to 117 | 121 |
121 | Trees | 122 |
| Mallees Back to 120 | 124 |
122 | Fruit hemispherical to ovoid | 123 |
| Fruit conical Back to 121 | Eucalyptus conica |
123 | Outer stamens infertile | Eucalyptus rudderi |
| All stamens fertile Back to 122 | Eucalyptus intertexta |
124 | Pith glands present | Eucalyptus costata |
| Pith glands absent Back to 121 | 125 |
125 | Disc broad, slightly depressed | Eucalyptus leptophylla |
| Disc narrow, steeply depressed Back to 124 | 126 |
126 | Fruit 4-angled | Eucalyptus calycogona |
| Fruit smooth Back to 125 | Eucalyptus gracilis |
127 | Buds and twigs glaucous | Eucalyptus nortonii |
| Buds and twigs non-glaucous Back to 116 | 128 |
128 | Adult leaves narrow-lanceolate to lanceolate | 129 |
| Adult leaves broad-lanceolate to ovate or ± elliptic, rarely lanceolate Back to 127 | 135 |
129 | Fruit <5 mm diam. | 130 |
| Fruit >5 mm diam. Back to 128 | 133 |
130 | Anthers adnate | 131 |
| Anthers versatile Back to 129 | 132 |
131 | Juvenile leaves broad-lanceolate (coastal forest tree) | Eucalyptus largeana |
| Juvenile leaves linear (far inland woodland tree) Back to 130 | Eucalyptus largiflorens |
132 | Fruit hemispherical; adult leaves dull | Eucalyptus acaciiformis |
| Fruit conical; adult leaves glossy Back to 130 | Eucalyptus aggregata |
133 | Fruit sessile | Eucalyptus goniocalyx |
| Fruit pedicellate Back to 129 | 134 |
134 | Juvenile leaves green | Eucalyptus retinens |
| Juvenile leaves glaucous Back to 133 | Eucalyptus volcanica |
135 | Trees | 136 |
| Mallees Back to 128 | Eucalyptus behriana |
136 | Anthers adnate | Eucalyptus populnea |
| Anthers versatile Back to 135 | Eucalyptus ovata |
137 | Adult leaves strongly discolorous | 138 |
| Adult leaves concolorous Back to 72 | 140 |
138 | Fruit >10 mm diam. | Eucalyptus scias |
| Fruit <10 mm diam. Back to 137 | 139 |
139 | Calyptra about as long as hypanthium | Eucalyptus notabilis |
| Calyptra much longer than hypanthium Back to 138 | Eucalyptus resinifera |
140 | Fruit sessile | 141 |
| Fruit pedicellate Back to 137 | 152 |
141 | Inflorescences 3-flowered | 142 |
| Inflorescences 7- or more-flowered Back to 140 | 147 |
142 | Adult leaves opposite | 143 |
| Adult leaves disjunct Back to 141 | 144 |
143 | Fruit conical | Eucalyptus cinerea |
| Fruit campanulate Back to 142 | Eucalyptus triplex |
144 | Juvenile leaves green | Eucalyptus badjensis |
| Juvenile leaves grey or blue Back to 142 | 145 |
145 | Fruit ovoid | Eucalyptus chapmaniana |
| Fruit campanulate Back to 144 | 146 |
146 | Branches smooth | Eucalyptus kartzoffiana |
| Branches with persistent fibrous bark Back to 145 | Eucalyptus alligatrix |
147 | Peduncle <3 mm long | Eucalyptus banksii |
| Peduncle >3 mm long Back to 141 | 148 |
148 | Fruit >6 mm diam. | 149 |
| Fruit <6 mm diam. Back to 147 | 151 |
149 | Adult leaves blue | 150 |
| Adult leaves green Back to 148 | Eucalyptus goniocalyx |
150 | Many adult leaves opposite | Eucalyptus conspicua |
| Adult leaves disjunct Back to 149 | Eucalyptus nortonii |
151 | Valves acute | Eucalyptus quadrangulata |
| Valves obtuse Back to 148 | Eucalyptus macarthurii |
152 | Calyptra >1.5 times as long as hypanthium | 153 |
| Calyptra equal in length to hypanthium Back to 140 | 158 |
153 | Disc raised | 154 |
| Disc not raised Back to 152 | 155 |
154 | Inflorescences 3-flowered | Eucalyptus morrisii |
| Inflorescences 7-flowered Back to 153 | Eucalyptus exserta |
155 | Disc flat | Eucalyptus bakeri |
| Disc sharply depressed Back to 153 | 156 |
156 | Mallees; inflorescences solitary | 157 |
| Trees; inflorescences often paired Back to 155 | Eucalyptus squamosa |
157 | Adult leaves opposite, ovate to broad-lanceolate or elliptic | Eucalyptus gillii |
| Adult leaves disjunct, lanceolate to broad-lanceolate Back to 156 | Eucalyptus socialis |
158 | Inflorescences compound | Eucalyptus coolabah |
| Inflorescences simple Back to 152 | 159 |
159 | Inflorescences often paired | 160 |
| Inflorescences solitary Back to 158 | 161 |
160 | Calyptra scar present | Eucalyptus squamosa |
| Calyptra scar absent Back to 159 | Eucalyptus fastigata |
161 | Juvenile leaves linear | 162 |
| Juvenile leaves broad-lanceolate or broader Back to 159 | 165 |
162 | Disc level or raised | 163 |
| Disc steeply depressed Back to 161 | Eucalyptus oleosa |
163 | Bark shedding from bases of larger branches | Eucalyptus smithii |
| Bark persisting to smaller branches Back to 162 | 164 |
164 | Adult leaves mostly >1 cm wide | Eucalyptus corticosa |
| Adult leaves mostly <1 cm wide Back to 163 | Eucalyptus nicholii |
165 | Buds glaucous | 166 |
| Buds not glaucous Back to 161 | 167 |
166 | Fruit 6–8 mm diam. | Eucalyptus malacoxylon |
| Fruit 4–5 mm diam. Back to 165 | Eucalyptus nova-anglica |
167 | Juvenile leaves green | 168 |
| Juvenile leaves blue Back to 165 | 170 |
168 | Fruit >5 mm diam. | Eucalyptus angophoroides |
| Fruit <5 mm diam. Back to 167 | 169 |
169 | Fruit conical | Eucalyptus aggregata |
| Fruit hemispherical or rounded Back to 168 | Eucalyptus acaciiformis |
170 | Juvenile leaves orbiculate | 171 |
| Juvenile leaves narrow-elliptic Back to 167 | Eucalyptus ignorabilis |
171 | Fruit >5 mm long | Eucalyptus bridgesiana |
| Fruit <5 mm long Back to 170 | Eucalyptus nova-anglica |
172 | Valves of fruit enclosed | 173 |
| Valves of fruit exserted Back to 1 | 229 |
173 | Inflorescences compound | 174 |
| Inflorescences simple Back to 172 | 176 |
174 | Fruit conical or ovoid | 175 |
| Fruit hemispherical Back to 173 | Eucalyptus michaeliana |
175 | Stamens regularly inflexed, outer whorls infertile | Eucalyptus polyanthemos |
| Stamens irregularly flexed, all fertile Back to 174 | Eucalyptus dawsonii |
176 | Fruit sessile | 177 |
| Fruit pedicellate Back to 173 | 194 |
177 | Inflorescences 3-flowered | 178 |
| Inflorescences 7-flowered or more Back to 176 | 182 |
178 | Adult leaves often opposite | 179 |
| Adult leaves disjunct Back to 177 | 181 |
179 | Opposite pairs of juvenile leaves fused at base | Eucalyptus perriniana |
| Juvenile leaves free Back to 178 | 180 |
180 | Adult leaves <10 mm wide | Eucalyptus recurva |
| Adult leaves >10 mm wide Back to 179 | Eucalyptus pulverulenta |
181 | Fruit cylindrical or ovoid, disc flat or depressed; juvenile leaves | Eucalyptus glaucescens |
| Fruit campanulate, disc slightly raised; juvenile leaves <4 cm long and wide Back to 178 | Eucalyptus saxatilis |
182 | Trees | 183 |
| Mallee Back to 177 | 189 |
183 | Calyptra scar present | Eucalyptus nitens |
| Calyptra scar absent Back to 182 | 184 |
184 | Buds in stellate clusters | 185 |
| Buds not in stellate clusters Back to 183 | 186 |
185 | Juvenile leaves elliptic or orbiculate | Eucalyptus stellulata |
| Juvenile leaves narrow-elliptic Back to 184 | Eucalyptus copulans |
186 | Adult leaf venation subparallel | 187 |
| Adult leaves with a distinct midrib Back to 184 | 188 |
187 | Fruit angular | Eucalyptus debeuzevillei |
| Fruit not angular Back to 186 | Eucalyptus niphophila |
188 | Fruit broader than long; juvenile leaves green | Eucalyptus kybeanensis |
| Fruit longer than broad; juvenile leaves blue Back to 186 | Eucalyptus oreades |
189 | Adult leaves often opposite | Eucalyptus sturgissiana |
| Adult leaves disjunct Back to 182 | 190 |
190 | Buds in stellate clusters | 191 |
| Buds not in stellate clusters Back to 189 | 193 |
191 | Juvenile leaves ovate to elliptic | Eucalyptus moorei |
| Juvenile leaves linear to lanceolate Back to 190 | 192 |
192 | Juvenile leaves lanceolate, adult leaves often >1 cm wide | Eucalyptus dissita |
| Juvenile leaves linear to narrow-lanceolate, adult leaves <1 cm wide Back to 191 | Eucalyptus moorei |
193 | Calyptra scar absent | Eucalyptus kybeanensis |
| Calyptra scar present Back to 190 | Eucalyptus dumosa |
194 | Venation in adult leaves subparallel | 195 |
| Venation in adult leaves not subparallel Back to 176 | 198 |
195 | Mallees; leaves lanceolate or narrower | Eucalyptus gregsoniana |
| Trees; leaves lanceolate to ovate Back to 194 | 196 |
196 | Internodes often >3 cm long | Eucalyptus lacrimans |
| Internodes <3 cm long Back to 195 | 197 |
197 | Buds strongly glaucous | Eucalyptus niphophila |
| Buds not strongly glaucous Back to 196 | Eucalyptus pauciflora |
198 | Mallees | 199 |
| Trees Back to 194 | 214 |
199 | Adult leaves >1.5 cm wide | 200 |
| Adult leaves <1.5 cm wide Back to 198 | 206 |
200 | Adult leaves with lateral veins strongly acute (<30° to midrib) | Eucalyptus multicaulis |
| Adult leaves with lateral veins 30–50° to midrib Back to 199 | 201 |
201 | Disc flat | Eucalyptus luehmanniana |
| Disc depressed Back to 200 | 202 |
202 | Buds glaucous | Eucalyptus stenostoma |
| Buds not glaucous Back to 201 | 203 |
203 | Twigs winged | Eucalyptus langleyi |
| Twigs not winged Back to 202 | 204 |
204 | Juvenile leaves dull, subglaucous; adult leaves to 3.5 cm wide | Eucalyptus burgessiana |
| Juvenile leaves glossy green; adult leaves to 2.5 cm wide Back to 203 | 205 |
205 | Fruit 8–11 mm diam. | Eucalyptus obstans |
| Fruit 3–5 mm diam. Back to 204 | Eucalyptus aenea |
206 | Disc flat | 207 |
| Disc depressed Back to 199 | 209 |
207 | Disc broad | Eucalyptus codonocarpa |
| Disc narrow Back to 206 | 208 |
208 | Leaves thick | Eucalyptus approximans |
| Leaves thin Back to 207 | Eucalyptus microcodon |
209 | Adult leaves <8 mm wide | 210 |
| Adult leaves often >8 mm wide Back to 206 | 212 |
210 | Immature adult leaves pinkish grey; longest peduncles <8 mm long | Eucalyptus cunninghamii |
| Immature adult leaves green; longest peduncles >8 mm long Back to 209 | 211 |
211 | Largest fruit >8 mm diam.; leaves usually <9 cm long, if longer then >7 mm wide | Eucalyptus laophila |
| Largest fruit <8 mm diam.; longest leaves >9 cm long and <7 mm wide Back to 210 | Eucalyptus apiculata |
212 | Fruit 3–5 mm diam. | Eucalyptus aenea |
| Fruit 6–11 mm diam. Back to 209 | 213 |
213 | Adult leaves <10 mm wide | Eucalyptus stricta |
| Adult leaves >10 mm wide Back to 212 | Eucalyptus spectatrix |
214 | Calyptra scar absent | 215 |
| Calyptra scar present Back to 198 | 224 |
215 | Disc flat | 216 |
| Disc not flat Back to 214 | 221 |
216 | Adult leaves dull | 217 |
| Adult leaves glossy Back to 215 | 219 |
217 | Tablelands and Western Slopes species | Eucalyptus rossii |
| Coastal species Back to 216 | 218 |
218 | Adult leaves <1.8 cm wide | Eucalyptus racemosa |
| Adult leaves >1.9 cm wide Back to 217 | Eucalyptus signata |
219 | Fruit >7 mm diam. | Eucalyptus haemastoma |
| Fruit <7 mm diam. Back to 216 | 220 |
220 | Coastal species north from Morisset | Eucalyptus signata |
| Sydney region, Blue Mtns and south Back to 219 | Eucalyptus racemosa |
221 | Fruit large (13–18 mm diam.), ribbed | Eucalyptus olsenii |
| Fruit small (4–10 mm diam.), not ribbed Back to 215 | 222 |
222 | Anthers versatile, reniform, dehiscing through confluent slits | Eucalyptus paliformis |
| Anthers adnate, dehiscing through separate slits Back to 221 | 223 |
223 | Inflorescences 3-flowered | Eucalyptus leucoxylon |
| Inflorescences 7-flowered Back to 222 | Eucalyptus melliodora |
224 | Juvenile leaves opposite for few pairs | Eucalyptus ovata |
| Juvenile leaves opposite for many pairs Back to 214 | 225 |
225 | Buds rounded, outer calyptra not shedding cleanly | Eucalyptus benthamii |
| Buds pointed, outer calyptra shedding cleanly Back to 224 | 226 |
226 | Inflorescences 3-flowered | Eucalyptus wilcoxii |
| Inflorescences 7-flowered Back to 225 | 227 |
227 | Fruit >5 mm diam. | 228 |
| Fruit <5 mm diam. Back to 226 | Eucalyptus dorrigoensis |
228 | Buds 4–5 mm diam. | Eucalyptus cypellocarpa |
| Buds 2.5–3.5 mm diam. Back to 227 | Eucalyptus oresbia |
229 | Calyptra >1.5 times as long as hypanthium | 230 |
| Calyptra <1.5 times as long as hypanthium Back to 172 | 245 |
230 | Buds glaucous | 231 |
| Buds not glaucous Back to 229 | 233 |
231 | Disc domed, >1.5 mm wide | Eucalyptus glaucina |
| Disc ± flat, <1.5 mm wide Back to 230 | 232 |
232 | Calyptra cylindrical | Eucalyptus prava |
| Calyptra conical Back to 231 | Eucalyptus dealbata |
233 | Calyptra cylindrical | Eucalyptus bancroftii |
| Calyptra conical or rostrate Back to 230 | 234 |
234 | Calyptra rostrate | Eucalyptus camaldulensis |
| Calyptra conical Back to 233 | 235 |
235 | Calyptra >2.5 times as long as hypanthium | 236 |
| Calyptra 1.5–2 times as long as hypanthium Back to 234 | 240 |
236 | Inflorescences >7-flowered | Eucalyptus amplifolia |
| Inflorescences 7-flowered Back to 235 | 237 |
237 | Seeds black | 238 |
| Seeds red Back to 236 | 239 |
238 | Fruit >6 mm in diam. | Eucalyptus tereticornis |
| Fruit <6 mm in diam. Back to 237 | Eucalyptus blakelyi |
239 | Fruit >5 mm long, adult leaves lanceolate | Eucalyptus interstans |
| Fruit <5 mm long, adult leaves narrow-lanceolate Back to 237 | Eucalyptus seeana |
240 | Juvenile leaves ovate to orbiculate | 241 |
| Juvenile leaves narrow-lanceolate to lanceolate Back to 235 | 243 |
241 | Mallees | 242 |
| Trees Back to 240 | Eucalyptus chloroclada |
242 | Adult leaves penniveined, glossy; coastal species | Eucalyptus pumila |
| Adult leaves with open venation, dull; inland plains species Back to 241 | Eucalyptus vicina |
243 | Trees; seeds red | Eucalyptus parramattensis |
| Mallees; seeds black Back to 240 | 244 |
244 | Fruit >5 mm diam. | Eucalyptus dwyeri |
| Fruit <5 mm diam. Back to 243 | Eucalyptus nandewarica |
245 | Inflorescences 3-flowered | 246 |
| Inflorescences 7- or more-flowered Back to 229 | 254 |
246 | Fruit >10 mm diam. | 247 |
| Fruit <10 mm diam. Back to 245 | 248 |
247 | Peduncles >3 mm long | Eucalyptus pseudoglobulus |
| Peduncles <3 mm long Back to 246 | Eucalyptus bicostata |
248 | Juvenile leaves broad lanceolate to ovate, to orbiculate or elliptic | 249 |
| Juvenile leaves lanceolate Back to 246 | 253 |
249 | Buds glaucous | 250 |
| Buds not glaucous Back to 248 | 251 |
250 | Juvenile stems rounded | Eucalyptus rubida |
| Juvenile stems markedly quadrangular Back to 249 | Eucalyptus canobolensis |
251 | Juvenile leaves grey | Eucalyptus dalrympleana |
| Juvenile leaves green Back to 249 | 252 |
252 | Calyptra as wide as hypanthium | Eucalyptus imlayensis |
| Calyptra narrower than hypanthium Back to 251 | Eucalyptus baeuerlenii |
253 | Calyptra narrower than hypanthium | Eucalyptus wilcoxii |
| Calyptra as wide as hypanthium Back to 248 | Eucalyptus viminalis |
254 | Adult leaves discolorous | 255 |
| Adult leaves concolorous Back to 245 | 263 |
255 | Disc raised or ± level | 256 |
| Disc depressed Back to 254 | 260 |
256 | Fruit >10 mm diam. | Eucalyptus canaliculata |
| Fruit <10 mm diam. Back to 255 | 257 |
257 | Valves apiculate, vertically raised | Eucalyptus major |
| Valves obtuse, incurved Back to 256 | 258 |
258 | Fruit <6 mm diam. | Eucalyptus propinqua |
| Fruit 6–10 mm diam. Back to 257 | 259 |
259 | Calyptra narrower than hypanthium | Eucalyptus biturbinata |
| Calyptra as wide as hypanthium Back to 258 | Eucalyptus punctata |
260 | Buds glaucous, valves broad-triangular, incurved | Eucalyptus grandis |
| Buds not glaucous Back to 255 | 261 |
261 | Adult leaves lanceolate; valves narrow-acuminate | Eucalyptus saligna |
| Adult leaves broad-lanceolate or broader; valves triangular, acute Back to 260 | 262 |
262 | Calyptra rounded, pedicels <4 mm long | Eucalyptus brunnea |
| Calyptra pointed, pedicels >4 mm long Back to 261 | Eucalyptus deanei |
263 | Adult leaves often opposite, <3 cm long | Eucalyptus parvula |
| Adult leaves disjunct, >3 cm long Back to 254 | 264 |
264 | Inflorescences usually paired in leaf axils | Eucalyptus pachycalyx |
| Inflorescences solitary in leaf axils Back to 263 | 265 |
265 | Adult leaves broad-lanceolate or broader | 266 |
| Adult leaves lanceolate or narrower Back to 264 | 268 |
266 | Adult leaves rounded or mucronate | 267 |
| Adult leaves acute Back to 265 | Eucalyptus ovata |
267 | Petioles 6–11 mm long; adult leaves 1.2–3.5 cm wide; peduncles 3–9 mm long | Eucalyptus aquatica |
| Petioles 10–20 mm long; adult leaves 3.0–5.0 mm wide; peduncles 10–18 mm long Back to 266 | Eucalyptus camphora |
268 | Bark shed in long ribbons | 269 |
| Bark shed in scales Back to 265 | 276 |
269 | Juvenile leaves ovate or broader | 270 |
| Juvenile leaves lanceolate Back to 268 | 273 |
270 | Buds glaucous | 271 |
| Buds not glaucous Back to 269 | 272 |
271 | Calyptra finely warty, apiculate | Eucalyptus maidenii |
| Calyptra smooth, not apiculate Back to 270 | Eucalyptus rubida |
272 | Adult leaves apparently finely toothed; outer calyptra not shedding cleanly | Eucalyptus denticulata |
| Adult leaves entire; outer calyptra shedding cleanly Back to 270 | Eucalyptus dalrympleana |
273 | Calyptra scar present | 274 |
| Calyptra scar absent Back to 269 | 275 |
274 | Buds 4–7 mm long; pedicels 1–4 mm long | Eucalyptus nobilis |
| Buds 9–13 mm long; pedicels <2 mm long Back to 273 | Eucalyptus quinniorum |
275 | Calyptra hemispherical | Eucalyptus kybeanensis |
| Calyptra conical, acute Back to 273 | Eucalyptus deuaensis |
276 | Juvenile leaves linear or lanceolate | 277 |
| Juvenile leaves broad lanceolate to ovate, elliptic or orbiculate Back to 268 | 280 |
277 | Trees | 278 |
| Mallees Back to 276 | 279 |
278 | Bark irregularly shedding, patchy, not powdery | Eucalyptus parramattensis |
| Bark clean or lightly mottled, powdery Back to 277 | Eucalyptus mannifera |
279 | Fruit >5 mm diam. | Eucalyptus dwyeri |
| Fruit <5 mm diam. Back to 277 | Eucalyptus nandewarica |
280 | Mallees | 281 |
| Trees Back to 276 | 282 |
281 | Adult leaves penniveined, glossy; coastal species | Eucalyptus pumila |
| Adult leaves with open venation, dull; inland plains species Back to 280 | Eucalyptus vicina |
282 | Juvenile leaves disjunct | Eucalyptus chloroclada |
| Juvenile leaves opposite for >10 nodes Back to 280 | 283 |
283 | Juvenile leaves not crenate | 284 |
| Juvenile leaves crenate, remaining opposite for several years Back to 282 | Eucalyptus dunnii |
284 | Fruit <5 mm long and <5 mm in diam. | 285 |
| Fruit 5 mm long and 5 mm in diam. or more Back to 283 | 286 |
285 | Buds acute; outer calyptra shedding cleanly | Eucalyptus dorrigoensis |
| Buds rounded; outer calyptra not shedding cleanly Back to 284 | Eucalyptus benthamii |
286 | Fruit 5–6 mm long | Eucalyptus lactea |
| Fruit 6–8 mm long Back to 284 | Eucalyptus elliptica |