| 词条 | Melaleuca oldfieldii |
| 释义 |
|status = P2 |status_system = DECF |genus = Melaleuca |species = oldfieldii |authority = F.Muell. ex Benth. }} Melaleuca oldfieldii is a plant in the myrtle family, Myrtaceae, and is native to the south-west of Western Australia. It is distinguished by its bright yellow flower heads but its distribution is restricted to one national park. DescriptionMelaleuca oldfieldii is a spreading shrub which grows to about {{convert|2|m|ft|sigfig=1|abbr=on}} high but sometimes much taller. Its leaves are arranged alternately on the stems, have a short stalk, are oval to elliptic in shape tapering to a point, usually {{convert|15-20|mm|in|sigfig=1|abbr=on}} long, {{convert|3.5-7|mm|in|sigfig=1|abbr=on}} wide and with 5 longitudinal veins.[1]The flowers are bright yellow and arranged in relatively large heads on the ends of branches which continue to grow after flowering. The heads are up to {{convert|35|mm|in|sigfig=1|abbr=on}} in diameter and contain 4 to 9 groups of flowers in threes. The petals are {{convert|1.8-3.8|mm|in|sigfig=1|abbr=on}} long and fall off as the flower opens. The stamens are arranged in five bundles around the flower, each bundle containing 8 to 12 stamens. Flowering occurs mainly in November and is followed by fruit which are woody capsules {{convert|4-6|mm|in|sigfig=2|abbr=on}} long in tight, roughly spherical groups about {{convert|25|mm|in|sigfig=1|abbr=on}} in diameter.[1][2] Taxonomy and namingMelaleuca oldfieldii was first described in 1867 by George Bentham in "Flora Australiensis".[3][4] The specific epithet (oldfieldii) is in recognition of the collector Augustus Oldfield who collected this species[1] near the Murchison River.[3]Distribution and habitatMelaleuca oldfieldii occurs in the Kalbarri National Park[2] in the Geraldton Sandplains biogeographic region,[5] growing in sand or sandy clay, usually along streams.[6]ConservationThis species is classified as "Priority Two" by the Government of Western Australia Department of Parks and Wildlife[5] meaning that is poorly known and from one or a few locations.[7] UsesHorticultureThis species has proven difficult to maintain in cultivation except in special conditions[2] but its glossy leaves and attractive yellow flowers indicate its potential as an ornamental.[1] It requires excellent drainage.[8] Essential oilsThe leaves of Melaleuca oldfieldii contain significant quantities of 1,8-cineole.[1] References1. ^1 2 3 4 {{cite book|last1=Brophy|first1=Joseph J.|last2=Craven|first2=Lyndley A.|last3=Doran|first3=John C.|title=Melaleucas : their botany, essential oils and uses|date=2013|publisher=Australian Centre for International Agricultural Research|location=Canberra|isbn=9781922137517|page=256}} {{Taxonbar|from=Q15372287}}2. ^1 2 {{cite book|last1=Holliday|first1=Ivan|title=Melaleucas : a field and garden guide|date=2004|publisher=Reed New Holland Publishers|location=Frenchs Forest, N.S.W.|isbn=1876334983|pages=204–205|edition=2nd}} 3. ^1 {{cite web|title=Melaleuca oldfieldii|url= https://biodiversity.org.au/boa/instance/apni/630997|publisher=APNI|accessdate=12 April 2015}} 4. ^{{cite book|last1=Mueller|first1=Ferdinand|last2=Bentham|first2=George|title=Flora Australiensis|date=1867|location=Melbourne|page=150|url=https://www.biodiversitylibrary.org/item/41807#page/158/mode/1up|accessdate=12 April 2015}} 5. ^1 {{FloraBase|name=Melaleuca oldfieldii|id = 5945}} 6. ^{{cite book|last1=Paczkowska|first1=Grazyna|last2=Chapman|first2=Alex R.|title=The Western Australian flora : a descriptive catalogue|date=2000|publisher=Wildflower Society of Western Australia|location=Perth|isbn=0646402439|page=396}} 7. ^{{cite web|title=Conservation codes for Western Australian Flora and Fauna|url=http://www.dpaw.wa.gov.au/images/documents/plants-animals/threatened-species/Listings/conservation_code_definitions.pdf|publisher=Government of Western Australia Department of Parks and Wildlife|accessdate=16 August 2015}} 8. ^{{cite book|last1=Wrigley|first1=John|last2=Fagg|first2=Murray|title=Australian native plant:a manual for their propagation, cultivation and use in landscaping|date=1983|publisher=Collins|location=Sydney-London|isbn=0002165759|page=267|edition=2}} 5 : Flora of Western Australia|Melaleuca|Myrtales of Australia|Plants described in 1867|Endemic flora of Western Australia |
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