Shrubs and trees. Leaves often of two types: juvenile, which are horizontal, opposite, cordate and sessile; and adult, which are usually vertical, alternate, petiolate and elongate. Inflorescence a cyme, often consisting of few to many umbels. Perianth modified to form an operculum which falls off when the stamens expand. Stamens numerous. Ovary inferior, 3-6-locular.  Fruit a hard and woody capsule.

Eucalyptus L'Hér.:
Honduras (Mesoamerica)
Madagascar (Africa & Madagascar)

Foodplant / saprobe
effuse colony of Belemnospora dematiaceous anamorph of Belemnospora epiphylla is saprobic on dead leaf of Eucalyptus

Foodplant / saprobe
immersed pycnidium of Coleophoma coelomycetous anamorph of Coleophoma empetri is saprobic on dead leaf of Eucalyptus
Remarks: season: 10-4

Foodplant / saprobe
colony of Conioscypha dematiaceous anamorph of Conioscypha hoehnelii is saprobic on bark of Eucalyptus

In Great Britain and/or Ireland:
Foodplant / sap sucker
adult of Ctenarytaina eucalypti sucks sap of live, distorted leaf of Eucalyptus
Remarks: season: summer
Other: sole host/prey

Foodplant / saprobe
pycnidium of Harknessia coelomycetous anamorph of Harknessia eucalypti is saprobic on dead litter of Eucalyptus

Plant / associate
hypogeous or subepigeous fruitbody of Hydnangium carneum is associated with Eucalyptus

Foodplant / mycorrhiza / ectomycorrhiza
hypogeous fruitbody of Hymenangium album is ectomycorrhizal with Eucalyptus
Other: sole host/prey

Plant / associate
hypogeous fruitbody of Hymenogaster arenarius is associated with Eucalyptus
Other: unusual host/prey

Foodplant / mycorrhiza / ectomycorrhiza
fruitbody of Laccaria fraterna is ectomycorrhizal with live root of Eucalyptus
Remarks: Other: uncertain
Other: sole host/prey

Foodplant / gall
larva of Ophelimus cf. maskelli causes gall of live leaf of Eucalyptus

Foodplant / saprobe
colony of Parapleurotheciopsis dematiaceous anamorph of Parapleurotheciopsis inaequiseptata is saprobic on dead, fallen leaf of Eucalyptus
Remarks: season: 9

Foodplant / saprobe
effuse colony of Phaeostalagmus dematiaceous anamorph of Phaeostalagmus peregrinus is saprobic on inside bark of Eucalyptus
Other: minor host/prey

Foodplant / pathogen
Phytophthora cinnamomi infects and damages root of Eucalyptus

Foodplant / saprobe
Polyaschema dematiaceous anamorph of Polyschema clavulata is saprobic on dead, fallen capsule of Eucalyptus

Foodplant / saprobe
amphigenous colony of Polyscytalum dematiaceous anamorph of Polyscytalum hareae is saprobic on dead, fallen leaf of Eucalyptus
Remarks: season: 8-11

Foodplant / saprobe
effuse colony of Polyscytalum dematiaceous anamorph of Polyscytalum truncatum is saprobic on dead, fallen leaf of Eucalyptus
Remarks: season: 9-11

Foodplant / saprobe
epiphyllous, immersed pycnidium of Readeriella coelomycetous anamorph of Readeriella mirabilis is saprobic on dead leaf of Eucalyptus

Foodplant / saprobe
erumpent, stalked apothecium of Zoellneria eucalypti is saprobic on attached, dead branch (small) of Eucalyptus
Remarks: season: 9

Bark protects buds from fire: eucalyptus trees
 

Some eucalyptus trees protect their dormant, vegetative buds from fire via thick bark.

   
  "In most angiosperm trees dormant epicormic buds are present in the outer bark, a position where they could be killed by fire. By contrast, in eucalypts the greatest epicormic bud initiation potential is at the level of the vascular cambium, which is protected by the maximum bark thickness. This might explain the pronounced ability of eucalypts to produce bole and branch epicormic shoots after moderate to intense fire." (Burrows 2002:111)
  Learn more about this functional adaptation.

Collection Sites: world map showing specimen collection locations for Eucalyptus

Barcode of Life Data Systems (BOLD) Stats
                                                             

Specimen Records:	16
Specimens with Sequences:	17
Specimens with Barcodes:	14
Public Records:	0
Species:	6
Species With Barcodes:	5

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