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{{Short description|Species of eucalyptus}}
{{italic title}}
{{Use dmy dates|date=July 2019}}
{{taxobox
{{speciesbox
|name = Woila gum
|name = Woila gum
|image = Eucalyptus olsenii.jpg
|image = Eucalyptus olsenii habit.jpg
|image_caption = ''Eucalyptus olsenii'', [[Melbourne]]
|image_caption = ''Eucalyptus olsenii'', cultivated specimen in the [[Blue Mountains Botanic Garden]]
|status =
|regnum = [[Plantae]]
|status_system =
|unranked_divisio = [[Angiosperm]]s
⚫
|genus = Eucalyptus
|unranked_classis = [[Eudicot]]s
⚫
|species = olsenii
|unranked_ordo = [[Rosid]]s
|authority = [[Lawrence Alexander Sidney Johnson|L.A.S.Johnson]] & [[Donald Frederick Blaxell|Blaxell]]<ref name="APC">{{cite web |title=''Eucalyptus olsenii'' |url=https://biodiversity.org.au/nsl/services/apc-format/display/114909 |website=Australian Plant Census |access-date=20 November 2019}}</ref>
|ordo = [[Myrtales]]
|familia = [[Myrtaceae]]
⚫
|genus = ''[[Eucalyptus]]''
⚫
|species = '''''E. olsenii'''''
|binomial = ''Eucalyptus olsenii''
|binomial_authority =
|range_map = E. olsenii.JPG
|range_map = E. olsenii.JPG
|range_map_caption = ''E. olsenii '', field distribution
|range_map_caption = ''E. olsenii '', field distribution
|}}
}}
[[File:Eucalyptus olsenii fruit.jpg|thumb|225px|fruit]]


'''''Eucalyptus olsenii''''', commonly known as the '''Woila gum''',<ref name="RBGS">{{cite web |last1=Hill |first1=Ken |title=''Eucalyptus olsenii'' |url=http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Eucalyptus~olsenii |publisher=Royal Botanic Garden Sydney |access-date=20 November 2019}}</ref> is a species of small tree that is [[Endemism|endemic]] to a restricted area on the [[Southern Tablelands]] of New South Wales. It has smooth bark with rough bark on the lower trunk, lance-shaped to curved adult leaves, flower buds in groups of seven, white flowers and barrel-shaped or urn-shaped fruit.
''Eucalyptus olsenii'', '''Woila gum''', is an [[Australia]]n eucalypt of restricted habitat.


==Description==
It is a small tree to 20 m with smooth, white bark, shedding in ribbons.
''Eucalyptus olsenii'' is a tree that typically grows to a height of {{cvt|10-20|mm}} high and forms a [[lignotuber]]. It has smooth white to cream-coloured bark that is shed in ribbons, sometimes with rough, fibrous or flaky bark at the base of the trunk. Young plants and [[coppice]] regrowth have glossy green leaves that are a paler shade on the lower side, egg-shaped to lance-shaped or elliptical, {{cvt|30-75|mm}} long and {{cvt|12-40|mm}} wide. Adult leaves are the same shade of glossy green on both sides, lance-shaped to curved, {{cvt|50-120|mm}} long and {{cvt|10-20|mm}} wide on a [[Petiole (botany)|petiole]] {{cvt|5-15|mm}} long. The flower buds are arranged in leaf [[wikt:axil|axil]]s in groups of seven on an unbranched [[Peduncle (botany)|peduncle]] {{cvt|3-8|mm}} long, the individual buds [[Sessility (botany)|sessile]] or on [[Pedicel (botany)|pedicels]] up to {{cvt|4|mm}} long. Mature buds are oval, {{cvt|10-17|mm}} long and {{cvt|6-7|mm}} wide with a conical to beaked [[Operculum (botany)|operculum]]. Flowering has been recorded in October and November and the flowers are white. The fruit is a woody, barrel-shaped or urn-shaped [[Capsule (botany)|capsule]] {{cvt|12-22|mm}} long and {{cvt|12-18|mm}} wide
with the valves below the level of the rim.<ref name="RBGS" /><ref name="CANBR">{{cite web |title=''Eucalyptus olsenii'' |url=https://apps.lucidcentral.org/euclid/text/entities/eucalyptus_olsenii.htm |publisher=Euclid: Centre for Australian National Biodiversity Research |access-date=31 May 2020}}</ref><ref name="ABRS">{{cite web |last1=Chippendale |first1=George M. |title=''Eucalyptus olsenii'' |url=https://profiles.ala.org.au/opus/foa/profile/Eucalyptus%20olsenii |publisher=Australian Biological Resources Study, Department of the Environment and Energy, Canberra |access-date=20 November 2019}}</ref><ref name="Telopea">{{cite journal |last1=Johnson |first1=Lawrence A.S. |last2=Blaxell |first2=Donald F. |title=New taxa and combination in ''Eucalyptus'' - 4 |journal=Telopea |date=1980 |volume=1 |issue=6 |pages=395–397|doi=10.7751/telopea19803601 |doi-access=free }}</ref>


==Taxonomy and naming==
Adult leaves are stalked, lanceolate or curved and oblique, 8–12&nbsp;cm long, 1.5–2&nbsp;cm wide, green, glossy, and concolorous. Young leaves and stems are covered with fine hairs.
''Eucalyptus olsenii'' was first formally described in 1980 by [[Lawrence Alexander Sidney Johnson|Lawrie Johnsone]] and [[Donald Frederick Blaxell|Don Blaxell]] in the journal ''[[Telopea (journal)|Telopea]]''.<ref name=APNI>{{cite web|title=''Eucalyptus olsenii''|url= https://id.biodiversity.org.au/instance/apni/456144|publisher=APNI|access-date=20 November 2019}}</ref> The [[Botanical name|specific epithet]] (''olsenii'') honours Ian Sinclair Olsen, who recognised the species as distinct on a bushwalking expedition led by Henry Fairlie-Cuninghame who collected the [[Type (biology)|type]] material.<ref name="Telopea" /><ref name="CANBR" />


==Distribution and habitat==
White flowers appear in spring to early summer.
⚫
Woila gum is restricted to mountains north east of [[Cooma]] and south of [[Braidwood, New South Wales|Braidwood]], where it grows in woodland in poor soil on steep slopes. It also grows well as an ornamental tree.<ref name="RBGS" /><ref>Brooker, M.I.H. & Kleinig, D.A. ''Field Guide to Eucalyptus'', Bloomings, Melbourne 2001

⚫
Distribution is very restricted to mountains north east of [[Cooma]] in [[New South Wales]] on rough rocky terrain, but it grows well as an ornamental tree.<ref>Brooker, M.I.H. & Kleinig, D.A. ''Field Guide to Eucalyptus'', Bloomings, Melbourne 2001
</ref>
</ref>

<gallery>
Image:Eucalyptus olsenii.jpg|young cultivated specimen [[Maranoa Gardens]], [[Melbourne]]
</gallery>


==References==
==References==
{{Portal|Trees}}

{{Reflist}}
{{Reflist}}

{{Taxonbar|from=Q5405660}}


[[Category:Eucalyptus|olsenii]]
[[Category:Eucalyptus|olsenii]]
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[[Category:Trees of Australia]]
[[Category:Trees of Australia]]
[[Category:Flora of New South Wales]]
[[Category:Flora of New South Wales]]
[[Category:Ornamental trees]]
[[Category:Plants described in 1980]]
[[Category:Taxa named by Lawrence Alexander Sidney Johnson]]


{{tree-stub}}
{{Eucalyptus-stub}}
{{Australia-rosid-stub}}

Latest revision as of 05:29, 6 May 2022

Woila gum
Eucalyptus olsenii, cultivated specimen in the Blue Mountains Botanic Garden
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species:
E. olsenii
Binomial name
Eucalyptus olsenii
E. olsenii , field distribution
fruit

Eucalyptus olsenii, commonly known as the Woila gum,[2] is a species of small tree that is endemic to a restricted area on the Southern Tablelands of New South Wales. It has smooth bark with rough bark on the lower trunk, lance-shaped to curved adult leaves, flower buds in groups of seven, white flowers and barrel-shaped or urn-shaped fruit.

Description[edit]

Eucalyptus olsenii is a tree that typically grows to a height of 10–20 mm (0.39–0.79 in) high and forms a lignotuber. It has smooth white to cream-coloured bark that is shed in ribbons, sometimes with rough, fibrous or flaky bark at the base of the trunk. Young plants and coppice regrowth have glossy green leaves that are a paler shade on the lower side, egg-shaped to lance-shaped or elliptical, 30–75 mm (1.2–3.0 in) long and 12–40 mm (0.47–1.57 in) wide. Adult leaves are the same shade of glossy green on both sides, lance-shaped to curved, 50–120 mm (2.0–4.7 in) long and 10–20 mm (0.39–0.79 in) wide on a petiole 5–15 mm (0.20–0.59 in) long. The flower buds are arranged in leaf axils in groups of seven on an unbranched peduncle 3–8 mm (0.12–0.31 in) long, the individual buds sessile or on pedicels up to 4 mm (0.16 in) long. Mature buds are oval, 10–17 mm (0.39–0.67 in) long and 6–7 mm (0.24–0.28 in) wide with a conical to beaked operculum. Flowering has been recorded in October and November and the flowers are white. The fruit is a woody, barrel-shaped or urn-shaped capsule 12–22 mm (0.47–0.87 in) long and 12–18 mm (0.47–0.71 in) wide with the valves below the level of the rim.[2][3][4][5]

Taxonomy and naming[edit]

Eucalyptus olsenii was first formally described in 1980 by Lawrie Johnsone and Don Blaxell in the journal Telopea.[6] The specific epithet (olsenii) honours Ian Sinclair Olsen, who recognised the species as distinct on a bushwalking expedition led by Henry Fairlie-Cuninghame who collected the type material.[5][3]

Distribution and habitat[edit]

Woila gum is restricted to mountains north east of Cooma and south of Braidwood, where it grows in woodland in poor soil on steep slopes. It also grows well as an ornamental tree.[2][7]

References[edit]

  1. ^ "Eucalyptus olsenii". Australian Plant Census. Retrieved 20 November 2019.
  2. ^ a b c Hill, Ken. "Eucalyptus olsenii". Royal Botanic Garden Sydney. Retrieved 20 November 2019.
  3. ^ a b "Eucalyptus olsenii". Euclid: Centre for Australian National Biodiversity Research. Retrieved 31 May 2020.
  4. ^ Chippendale, George M. "Eucalyptus olsenii". Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 20 November 2019.
  5. ^ a b Johnson, Lawrence A.S.; Blaxell, Donald F. (1980). "New taxa and combination in Eucalyptus - 4". Telopea. 1 (6): 395–397. doi:10.7751/telopea19803601.
  6. ^ "Eucalyptus olsenii". APNI. Retrieved 20 November 2019.
  7. ^ Brooker, M.I.H. & Kleinig, D.A. Field Guide to Eucalyptus, Bloomings, Melbourne 2001
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