What is Eucalyptus regnans?
{{speciesbox |name = Mountain ash | image = Tasmania logging 08 Mighty tree.jpg | image_caption = [[El Grande (tree)|El Grande]] in Tasmania's [[Styx Valley]] |genus = Eucalyptus |species = regnans | status_system = | status = |authority = [[F.Muell.]] | synonyms= * ''Eucalyptus amygdalina'' var. ''regnans'' <small>F.Muell.</small> |}} '''''Eucalyptus regnans''''', also called '''Mountain Ash''', '''Victorian Ash''', '''Swamp Gum''', '''Tasmanian Oak''' or '''Stringy Gum''', is a [[species]] of ''[[Eucalyptus]]'' from [[Victoria (Australia)|Victoria]] and [[Tasmania]]. It can grow to more than {{convert|100|m|ft|0|lk=on|abbr=on}} and is the tallest flowering plant in the world. == Description == It is an [[evergreen]] [[tree]], the tallest eucalyptus tree, growing 70–120&nbsp;m (230–400 feet) tall. It has a straight, grey trunk with smooth [[bark]]. The [[leaf|leaves]] are narrow, curved, and end in a point, like a [[sickle]]. They grow up to {{convert|14|cm|in|0|lk=on|abbr=on}} long and {{convert|2.5|cm|in|0|lk=on|abbr=on}} wide. They are green to grey-green with a red stalk. The [[flower]]s are in groups of 9-15 together, each flower about 1 [[cm]] (0.5&nbsp;in) [[diameter]] with a ring of many white [[stamen]]s. The [[fruit]] is a hard nut, up to 9&nbsp;mm (0.5&nbsp;in) long and 7&nbsp;mm (0.4&nbsp;in) wide. == Habitat == Mountain Ash are found in cool, deep soiled, mountain areas to {{convert|1000|m|ft|0|lk=on|abbr=on}} above [[sea level]], with high [[rainfall]] of over {{convert|1200|mm|in|0|lk=on|abbr=on}} each year.<ref>{{cite web |url=http://www.anbg.gov.au/cpbr/cd-keys/euclid3/euclidsample/html/Eucalyptus_regnans.htm |title=Factsheet – Eucalyptus regnans |publisher=www.anbg.gov.au |accessdate=2009-06-20 |last= |first= |archive-date=2009-05-04 |archive-url=https://web.archive.org/web/20090504091744/http://www.anbg.gov.au/cpbr/cd-keys/euclid3/euclidsample/html/Eucalyptus_regnans.htm |url-status=dead }}</ref> They grow very quickly, at more than a metre (3 feet) a year, and can reach {{convert|65|m|f