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{{Short description|Species of eucalyptus}} |
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{{speciesbox |
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{{taxobox |
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|name = |
|name = Balladonia mallee |
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|regnum = [[Plantae]] |
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|image_caption = ''Eucalyptus balladoniensis'' growing near [[Balladonia, Western Australia|Balladonia]] |
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|unranked_divisio = [[Angiosperm]]s |
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|status = LC |
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|unranked_classis = [[Eudicot]]s |
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|status_system = IUCN3.1 |
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|unranked_ordo = [[Rosid]]s |
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| status_ref = <ref>{{cite iucn |author=Fensham, R. |author2=Collingwood, T. |author3=Laffineur, B. |year=2019 |title=''Eucalyptus balladoniensis'' |volume=2019 |page=e.T133378024A133378026 |doi=10.2305/IUCN.UK.2019-3.RLTS.T133378024A133378026.en |access-date=20 September 2021}}</ref> |
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|ordo = [[Myrtales]] |
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|familia = [[Myrtaceae]] |
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|authority = [[Ian Brooker|Brooker]]<ref name=APC>{{cite web|title=''Eucalyptus balladoniensis''|url= https://biodiversity.org.au/nsl/services/apc-format/display/57382|publisher=Australian Plant Census|access-date=9 March 2019}}</ref> |
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|binomial_authority = [[Ian Brooker|Brooker]] |
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'''''Eucalyptus balladoniensis''''', commonly known as the '''Balladonia mallee''',<ref name=FloraBase>{{FloraBase|name=''Eucalyptus balladoniensis''|id=5559}}</ref> is a [[Mallee (habit)|mallee]] that is [[Endemism|endemic]] to an area in the south of [[Western Australia]]. It has rough bark on the lower half of its stems, smooth brownish bark above, lance-shaped leaves, flower buds in groups of seven, pale yellow flowers and hemispherical to more or less spherical fruit.[[File:Eucalyptus balladoniensis buds.jpg|thumb|flower buds]][[File:Eucalyptus balladoniensis flowers.jpg|thumb|flowers]][[File:Eucalyptus balladoniensis fruit.jpg|thumb|fruit]] |
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'''''Eucalyptus balladoniensis''''' is a mallee tree that is native to [[Western Australia]].<ref name=FloraBase>{{FloraBase|name=''Eucalyptus balladoniensis''|id=5559}}</ref> |
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==Description== |
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''Eucalyptus balladoniensis'' is a mallee that typically grows to a height of {{convert|2.5|to|10|m|ft|1}} and has rough, dark grey, fibrous to flaky bark on the lower half of its stems and smooth dark grey bark above that reveals smooth brownish bark above when in sheds in short ribbons. Young plants and [[coppice]] regrowth have dull greyish green, linear to narrow lance-shaped leaves {{convert|100-150|mm|in|sigfig=2|abbr=on}} long and {{convert|6-20|mm|in|sigfig=1|abbr=on}} wide. Adult leaves are lance-shaped, {{convert|70-135|mm|in|sigfig=2|abbr=on}} long and {{convert|10-27|mm|in|sigfig=1|abbr=on}} wide on a [[Petiole (botany)|petiole]] {{convert|12-25|mm|in|sigfig=2|abbr=on}} long.<ref name=FloraBase/><ref name="CANBR">{{cite web |title=''Eucalyptus balladoniensis'' subsp. ''balladoniensis'' |url=http://keyserver.lucidcentral.org:8080/euclid/data/02050e02-0108-490e-8900-0e0601070d00/media/Html/Eucalyptus_balladoniensis_subsp._balladoniensis.htm |publisher=Euclid: Centre for Australian National Biodiversity Research |access-date=11 March 2019}}</ref><ref name="ABRS">{{cite web |last1=Chippendale |first1=George McCartney |title=''Eucalyptus balladoniensis'' |url=https://profiles.ala.org.au/opus/foa/profile/Eucalyptus%20balladoniensis |publisher=Australian Biological Resources Study, Department of the Environment and Energy, Canberra |access-date=11 March 2019}}</ref><ref name="Nuytsia">{{cite journal |last1=Brooker |first1=M. Ian |title=Six new taxa of ''Eucalyptus'' from Western Australia |journal=Nuytsia |date=1976 |volume=2 |issue=2 |pages=103–105 |url=https://www.biodiversitylibrary.org/item/223107#page/21/mode/1up |access-date=11 March 2019}}</ref> |
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The flowers are borne in groups of seven in leaf [[wikt:axil|axil]]s on an unbranched [[Peduncle (botany)|peduncle]] {{convert|10-20|mm|in|sigfig=2|abbr=on}} long, the individual buds [[Sessility (botany)|sessile]] or on a [[Pedicel (botany)|pedicel]] {{convert|5-11|mm|in|sigfig=2|abbr=on}} long. Mature buds are more or less spherical, {{convert|19-25|mm|in|sigfig=2|abbr=on}} long and {{convert|9-11|mm|in|sigfig=1|abbr=on}} wide with a beaked [[Operculum (botany)|operculum]], the beak less obvious as the bud develops. Flowering mainly occurs from August to October and the flowers are pale yellow. The fruit is a woody hemispherical or shortened spherical [[Capsule (botany)|capsule]] {{convert|7-11|mm|in|sigfig=2|abbr=on}} long and {{convert|10-14|mm|in|sigfig=1|abbr=on}} wide.<ref name="FloraBase" /><ref name="CANBR" /><ref name="ABRS" /><ref name="Nuytsia" /> |
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==Taxonomy and naming== |
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''Eucalyptus balladoniensis'' was first formally described in 1976 by [[Ian Brooker]] from a specimen he collected {{convert|80|km|mi|sigfig=2|abbr=on}} south of [[Zanthus, Western Australia|Zanthus]] on the road to [[Balladonia, Western Australia|Balladonia]]. The description was published in the journal ''[[Nuytsia (journal)|Nuytsia]]''.<ref name=APNI>{{cite web|title=''Eucalyptus balladoniensis''|url= https://id.biodiversity.org.au/instance/apni/454507 |publisher=APNI|access-date=11 March 2019}}</ref><ref name="Nuytsia" /> The [[Botanical name|specific epithet]] (''balladoniensis'') is a reference to the distribution of this eucalypt - the ending ''-ensis'' a [[Latin]] [[wikt:suffix|suffix]] "denoting place, locality [or] country".<ref name="CANBR" /><ref name="RWB">{{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.|page=303}}</ref> |
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In 1992 [[Ken Hill (botanist)|Ken Hill]] and [[Lawrence Alexander Sidney Johnson|Lawrie Johnson]] described two subspecies of ''E. balladoniensis'':<ref name="Telopea">{{cite journal |last1=Hill |first1=Kenneth D. |last2=Johnson |first2=Lawrence A.S. |title=Systematic studies in the eucalypts. 5. New taxa and combinations in ''Eucalyptus'' (Myrtaceae) |journal=Telopea |date=1992 |volume=4 |issue=4 |pages=614–617 |doi=10.7751/telopea19814948 |url=https://www.biodiversitylibrary.org/item/264300#page/58/mode/1up|access-date=2 November 2021 |doi-access=free }}</ref> |
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* ''Eucalyptus balladoniensis'' subsp. ''balladoniensis'' that has flower buds with a pedicel {{convert|5-11|mm|in|sigfig=2|abbr=on}} long and fruit with a pedicel {{convert|6-16|mm|in|sigfig=2|abbr=on}} long;<ref name=APNI1>{{cite web|title=''Eucalyptus balladoniensis'' subsp. ''balladoniensis|url= https://id.biodiversity.org.au/instance/apni/456362 |publisher=APNI|access-date=11 March 2019}}</ref><ref name=FloraBase1>{{FloraBase|name=''Eucalyptus balladoniensis'' subsp. ''balladoniensis''|id=13063}}</ref> |
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* ''Eucalyptus balladoniensis'' subsp. ''sedens'' that has its buds and fruits sessile or with a very short pedicel.<ref name=APNI2>{{cite web|title=''Eucalyptus balladoniensis'' subsp. ''sedens''|url= https://id.biodiversity.org.au/instance/apni/456363|publisher=APNI|access-date=11 March 2019}}</ref><ref name=FloraBase2>{{FloraBase|name=''Eucalyptus balladoniensis'' subsp. ''sedens''|id=13063}}</ref> |
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==Distribution and habitat== |
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Balladonia mallee grows in dry woodland, often on sandy rises or [[calcareous]] sandy loam. Subspecies ''balladoniensis'' has a wide distribution south of the [[Eyre Highway]] but subspecies ''sedens'' only occurs between Balladonia and Zanthus.<ref name="CANBR" /> |
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==Conservation== |
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Both subspecies of ''E. balladoniensis'' are classified as "not threatened" by the Western Australian Government [[Department of Parks and Wildlife (Western Australia)|Department of Parks and Wildlife]].<ref name="FloraBase" /> |
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==See also== |
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{{Portal|Trees}} |
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*[[List of Eucalyptus species|List of ''Eucalyptus'' species]] |
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==References== |
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{{Reflist}} |
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{{Taxonbar|from=Q15395826}} |
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[[Category:Eucalyptus|balladoniensis]] |
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[[Category:Endemic flora of Western Australia]] |
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[[Category:Mallees (habit)]] |
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[[Category:Myrtales of Australia]] |
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[[Category:Goldfields-Esperance]] |
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[[Category:Plants described in 1976]] |
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[[Category:Taxa named by Ian Brooker]] |
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Latest revision as of 15:59, 13 December 2023
| Balladonia mallee | |
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| Eucalyptus balladoniensis growing near Balladonia | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Myrtales |
| Family: | Myrtaceae |
| Genus: | Eucalyptus |
| Species: | E. balladoniensis
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| Binomial name | |
| Eucalyptus balladoniensis | |
Eucalyptus balladoniensis, commonly known as the Balladonia mallee,[3] is a mallee that is endemic to an area in the south of Western Australia. It has rough bark on the lower half of its stems, smooth brownish bark above, lance-shaped leaves, flower buds in groups of seven, pale yellow flowers and hemispherical to more or less spherical fruit.
Description[edit]
Eucalyptus balladoniensis is a mallee that typically grows to a height of 2.5 to 10 metres (8.2 to 32.8 ft) and has rough, dark grey, fibrous to flaky bark on the lower half of its stems and smooth dark grey bark above that reveals smooth brownish bark above when in sheds in short ribbons. Young plants and coppice regrowth have dull greyish green, linear to narrow lance-shaped leaves 100–150 mm (3.9–5.9 in) long and 6–20 mm (0.2–0.8 in) wide. Adult leaves are lance-shaped, 70–135 mm (2.8–5.3 in) long and 10–27 mm (0.4–1 in) wide on a petiole 12–25 mm (0.47–0.98 in) long.[3][4][5][6]
The flowers are borne in groups of seven in leaf axils on an unbranched peduncle 10–20 mm (0.39–0.79 in) long, the individual buds sessile or on a pedicel 5–11 mm (0.20–0.43 in) long. Mature buds are more or less spherical, 19–25 mm (0.75–0.98 in) long and 9–11 mm (0.4–0.4 in) wide with a beaked operculum, the beak less obvious as the bud develops. Flowering mainly occurs from August to October and the flowers are pale yellow. The fruit is a woody hemispherical or shortened spherical capsule 7–11 mm (0.28–0.43 in) long and 10–14 mm (0.4–0.6 in) wide.[3][4][5][6]
Taxonomy and naming[edit]
Eucalyptus balladoniensis was first formally described in 1976 by Ian Brooker from a specimen he collected 80 km (50 mi) south of Zanthus on the road to Balladonia. The description was published in the journal Nuytsia.[7][6] The specific epithet (balladoniensis) is a reference to the distribution of this eucalypt - the ending -ensis a Latin suffix "denoting place, locality [or] country".[4][8]
In 1992 Ken Hill and Lawrie Johnson described two subspecies of E. balladoniensis:[9]
- Eucalyptus balladoniensis subsp. balladoniensis that has flower buds with a pedicel 5–11 mm (0.20–0.43 in) long and fruit with a pedicel 6–16 mm (0.24–0.63 in) long;[10][11]
- Eucalyptus balladoniensis subsp. sedens that has its buds and fruits sessile or with a very short pedicel.[12][13]
Distribution and habitat[edit]
Balladonia mallee grows in dry woodland, often on sandy rises or calcareous sandy loam. Subspecies balladoniensis has a wide distribution south of the Eyre Highway but subspecies sedens only occurs between Balladonia and Zanthus.[4]
Conservation[edit]
Both subspecies of E. balladoniensis are classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.[3]
See also[edit]
References[edit]
- ^ Fensham, R.; Collingwood, T.; Laffineur, B. (2019). "Eucalyptus balladoniensis". IUCN Red List of Threatened Species. 2019: e.T133378024A133378026. doi:10.2305/IUCN.UK.2019-3.RLTS.T133378024A133378026.en. Retrieved 20 September 2021.
- ^ "Eucalyptus balladoniensis". Australian Plant Census. Retrieved 9 March 2019.
- ^ a b c d "Eucalyptus balladoniensis". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
- ^ a b c d "Eucalyptus balladoniensis subsp. balladoniensis". Euclid: Centre for Australian National Biodiversity Research. Retrieved 11 March 2019.
- ^ a b Chippendale, George McCartney. "Eucalyptus balladoniensis". Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 11 March 2019.
- ^ a b c Brooker, M. Ian (1976). "Six new taxa of Eucalyptus from Western Australia". Nuytsia. 2 (2): 103–105. Retrieved 11 March 2019.
- ^ "Eucalyptus balladoniensis". APNI. Retrieved 11 March 2019.
- ^ Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 303.
- ^ Hill, Kenneth D.; Johnson, Lawrence A.S. (1992). "Systematic studies in the eucalypts. 5. New taxa and combinations in Eucalyptus (Myrtaceae)". Telopea. 4 (4): 614–617. doi:10.7751/telopea19814948. Retrieved 2 November 2021.
- ^ "Eucalyptus balladoniensis subsp. balladoniensis". APNI. Retrieved 11 March 2019.
- ^ "Eucalyptus balladoniensis subsp. balladoniensis". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
- ^ "Eucalyptus balladoniensis subsp. sedens". APNI. Retrieved 11 March 2019.
- ^ "Eucalyptus balladoniensis subsp. sedens". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.