Eucalyptus

Stand of mountain ash Eucalyptus regnans, photographed by Michael Ryan.


Belongs within: Eucalypteae.

Eucalyptus is a large genus of more than 700 species of trees and shrubs, mostly native to Australia (with a very few reaching into insular south-east Asia). Many species in the genus are also grown outside their native range as timber trees. Many species of the genus are commonly known as 'gum trees' for their production of copious gum through breaks in the bark. Eucalyptus species that are multi-stemmed from ground level are commonly referred to as 'mallees'. Many species of Eucalyptus have well-developed oil glands on the leaves that give them a very characteristic scent, and vapour from this oil has long been used to relieve colds and other mucus build-ups. However, the flammability of eucalyptus oil can exacerbate the spread of fire in eucalyptus forests; the trees themselves can often recover from fires by the production of epicormic growth from beneath burnt bark. The mountain ash Eucalyptus regnans, found in Tasmania and Victoria, is one of the world's tallest tree species.

The name 'Eucalyptus', meaning 'true covering', refers to the operculum that covers the stamens and ovary during flower development before being shed at maturity. In members of the subgenus Symphomyrtus, a double operculum is present with the outer operculum being shed early in development. In the subgenus Eucalyptus, only a single operculum is present at any point in development (Boland et al. 2006).

<==Eucalyptus
    |--E. subg. Eucalyptus WFM06
    |    |--E. marginata WFM06
    |    |--E. regnans WFM06
    |    `--E. stellulata WFM06
    `--E. (subg. Symphomyrtus) woodwardii WFM06

Eucalyptus incertae sedis:
  E. abergiana C16
  E. accedens MCR04
  E. acmenoides B00
  E. alba C78
    |--E. a. var. alba LK14
    `--E. a. var. australasica LK14
  E. albens C08
  E. alipes G04b
  E. amygdalina W95
  E. andreana MH98
  E. andrewsi C08
  E. angophoroides M16
  E. angustissima M16
  E. annulata G04b
  E. apodophylla LK14
  E. argyphea OS04
  E. aspersa OS04
  E. astringens OS04
  E. australiana Baker & Smith 1916 [=E. amygdalina var. australiana] BS16
  E. bancrofti C08
  E. banksii C08
  E. behriana R35
  E. bicolor R35
  E. bicostata MH98
  E. bigalerita PP13
  E. bleeseri S85
  E. botryoides W95
  E. brachyandra LK14
  E. brachycorys G04a
  E. brevifolia Ho09 [=E. tereticornis var. brevifolia C08]
  E. bridgesiana H42
  E. brownii C16
  E. burracoppinensis S95
  E. caesia TB04
  E. cajuputea M16
  E. caleyi C08
  E. calophyla W95
    |--E. c. var. calophyla R35
    `--E. c. var. rosea R35
  E. calycogona G04b
    |  i. s.: E. c. var. celastroides M16
    |         E. c. var. gracilis M16
    |--E. c. ssp. calycogona G04b
    `--E. ‘celastroides’ ssp. virella G04b
  E. camaldulensis B08
    |--E. c. ssp. camaldulensis LK14
    `--E. c. ssp. obtusa LK14
  E. cambageana C16
  E. camphora MH98
  E. capillosa G04b
    |--E. c. ssp. capillosa G04b
    `--E. c. ssp. polyclada G04b
  E. capitellata H42
  E. ceracea LK14
  E. chippendalei B05
  E. cinerea MH98
    |--E. c. var. cinerea M16
    `--E. c. var. multiflora M16
  E. citriodora W95 [=E. maculata var. citriodora C16]
  E. cladocalyx [incl. E. corynocalyx] H93
  E. clavigera M16
  E. clelandi M16
  E. cloeziana W95
  E. cnerifolia M16
  E. conferruminata H06
  E. confertiflora C78
  E. confluens Fitzgerald in Maiden 1916 M16
  E. conglobata G04b
  E. conica [=E. baueriana var. conica] C08
  E. cooperiana M16
  E. coriacea H42
  E. cornuta GK00
  E. corymbosa H42
  E. creba W95
  E. curtisii WO05
  E. cylindriflora G04b
  E. cylindrocarpa G04b
  E. cypellocarpa W95
  E. dalrympleana H42
  E. dealbata [=E. tereticornis var. dealbata] C08
  E. deane W95
  E. decipiens RS04
  E. decurva M16
  E. deglupta C78
  E. delegatensis R96
  E. densa G04b
  E. dichromophloia C16
  E. diversicolor He09
  E. dives H42
  E. drepanophylla B00
  E. dumosa A69 [=E. incrassata var. dumosa R35]
  E. dundasi Maiden 1916 M16
  E. dunni W95
  E. ebbanoensis G04a
    |--E. e. ssp. ebbanoensis G04a
    `--E. e. ssp. glauciramula G04a
  E. elaeophora H42
  E. eremophila G04b
  E. erythronema S95
  E. eugenioides H42
  E. ewartiana EF04
  E. exigua G04b
  E. exserta C16
  E. falcata [incl. E. dorrienii Domin 1913] M16
  E. fastigata W95
  E. ficifolia He09
  E. fitzgeraldii LK14
  E. flocktoniae Maiden 1916 [=E. oleosa var. flocktoni Maiden 1911] M16
  E. foecunda B14
  E. formanii G04a
  E. fruticosa KM08
  E. gamophylla EF04
  E. georgei G04a
    |--E. g. ssp. georgei G04a
    `--E. g. ssp. fulgida G04a
  E. gigantea H42
  E. gillii M16
  E. globulus WFM06
  E. glomericassis LK14
  E. gomphocephala W95
  E. gongylocarpa CC03
  E. goniocalyx C08
  E. grandis WFM06
  E. grasbyi G04a
  E. gratiae G04b
  E. griffithsii G04a
  E. grossa G04b
  E. gummifera B14
  E. gunnii MH98
  E. haemastoma WO05
  E. haematoxylon H18
  E. hayi Ettingshausen 1886 F71
  E. hemiphloia H42
  E. herbertiana LK14
  E. houseana Fitzgerald in Maiden 1916 M16
  E. houtmanni Ettingshausen 1886 F71
  E. hybrida SK02
  E. incrassata OS04
    |--E. i. var. incrassata FS54
    `--E. i. var. angulosa FS54
  E. intermedia W95
  E. jacksonii B08
  E. jensenii LK14
  E. kenneallyi LK14
  E. kingsmillii BS05
  E. kitsoniana R55
  E. kochii WFM06
    |--E. k. ssp. kochii G04a
    `--E. k. ssp. amaryssia G04a
  E. kombolgiensis S85
  E. kondininensis G04b
  E. kruseana Mueller 1895 [incl. E. morrisoni Maiden 1910] M16
  E. largiflorens LF10
  E. latens OS04
  E. lehmannii FS54
  E. leichhardtii C16
  E. leptophleba C16
  E. leptopoda CWB06
    |--E. l. ssp. leptopoda G04a
    `--E. l. ssp. subluta G04a
  E. leucophloia HD04
  E. leucoxylon W95
  E. lirata LK14
  E. livida G04b
  E. longifolia W95
  E. loxophleba OS04
    |--E. l. ssp. loxophleba G04b
    `--E. l. ssp. lissophloia G04b
  E. lucasii MLP09
  E. macrorrhyncha B88
  E. maculata W95
  E. maidenii MH98
  E. major S00
  E. mannifera HR01
  E. megacarpa GK00
  E. melanophloea M65
  E. melliodora W95
  E. micrantha W95
  E. microcorys W95
  E. microtheca H42
  E. miniata Ho09
  E. mitchellii Ettingshausen 1886 F71
  E. moderata G04a
  E. moluccana B00
  E. moorei M16
  E. muelleriana H42
  E. myriadena G04b
  E. myrtella B88
  E. neliodora W95
  E. nitens WFM06
  E. nova-anglica W95
  E. obconica LK14
  E. obliqua W95
  E. obtusiflora KM08
  E. occidentalis OS04
  E. odorata M16
    |--E. o. var. odorata M16
    `--E. o. var. calcicultrix M16
  E. oldfieldii G04a
  E. oleosa W95
    |  i. s.: E. o. var. longicornis M16
    |--E. o. ssp. oleosa G04a
    `--E. o. ssp. repleta G04a
  E. oligantha LK14
  E. olivina G04b
  E. oraria KM08
  E. oreades W95
  E. ovata W95
  E. pallidifolia C16
  E. paniculata W95
  E. pantoleuca LK14
  E. papuana [incl. E. tesselaris var. dallachiana, E. clavigera var. dallachiana] M16
  E. patens B08
  E. pauciflora KC83
  E. paucifolia F49
  E. pellita H42
  E. peltata C16
  E. peniculata W95
  E. phaenophylla G04b
    |--E. p. ssp. phaenophylla G04b
    `--E. p. ssp. interjacens G04b
  E. phaeotricha W95
  E. phenax OS04
  E. phoenicea LK14
  E. phylacis RS04
  E. pilbarensis MLP09
  E. pileata G04b
  E. piluris S00
  E. piperita W95
  E. platyphylla CW92
  E. platypus KM08
  E. pluricaulis OS04
  E. polyanthemos H42
  E. populifolia B88
  E. populnea M64
  E. propinqua W95
  E. protensa G04b
  E. pruinosa C16
  E. pulverulenta H93
  E. punctata W95
  E. pyriformis R35
  E. quadrangulata S15
  E. quadrans G04b
  E. racemosa FS09
  E. radiata B88
  E. raveretiana C16
  E. redunca W95
    |--E. r. var. redunca W95
    `--E. r. var. elata W95
  E. repullulans EF04
  E. resinifera W95
  E. rigidula G04b
  E. risdoni M16
  E. robusta HM03
  E. rossii HR01
  E. rostrata W95
  E. rubida [=E. gunnii var. rubida] C08
  E. rudis B88
  E. rugulata G04b
  E. rupestris LK14
  E. saligna W95
  E. salmonophloia B08
  E. salubris W95
  E. seeana Maiden 1904 M16
  E. setosa C16
  E. sheathiana Maiden 1916 M16
  E. siderophloia H42
  E. sideroxylon W95
  E. sieberiana H42
  E. smithii Baker 1899 S15
  E. socialis EF04
    |--E. s. ssp. socialis MLP09
    `--E. s. ssp. eucentrica MLP09
  E. sporadica G04b
  E. squamosa M16
  E. staeri CW03
  E. striata B88
  E. striaticalyx LF10
  E. stuartiana B88
    |--E. s. var. stuartiana M16
    `--E. s. var. parviflora M16
  E. subangusta G04a
  E. subtenuis G04b
  E. tectifica LK14
  E. tesselaris M16
  E. tenera G04b
  E. tephrodes MLP09
  E. tereticornis W95
  E. terminalis HD04
  E. tessellaris M65
  E. tetrodonta Ho09
  E. thamnoides OS04
    |--E. t. ssp. thamnoides OS04
    `--E. t. ssp. megista OS04
  E. thozetiana C16
  E. todtiana RL05
  E. torelliana B00
  E. torquata M16
  E. trachyphloia WEE70
  E. transcontinentalis B08
  E. triantha W95
  E. trivalva MLP09
  E. umbellata B88
  E. uncinata OS04
  E. urna G04b
  E. victrix KM08
  E. viminalis W95
  E. wandoo MCR04
  E. websteriana Maiden 1916 M16
  E. xerothermica EF04
  E. yilgarnensis G04b

*Type species of generic name indicated

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Last updated: 2 December 2018.

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