| 词条 | Eucalyptus myriadena |
| 释义 |
|name = |image = |status = |status_system = |genus = Eucalyptus |species = myriadena |authority = Brooker |}}Eucalyptus myriadena, also known as blackbutt,[1] is a mallee tree that is native to Western Australia.[1] DescriptionThe tree typically grows to a height of {{convert|3|to|12|m|ft|0}}[1] and forms a lignotuber. It has bronze-grey and coppery smooth bark that is grey, rough and flaky on the trunk. The concolorous, very glossy, green adult leaves are alternately arranged. The blade linear has a narrowly lanceolate shape with a length of {{cvt|5|to|10|cm}} and a width of {{cvt|0.6|to|1.2|cm|abbr=on}} with a base that tapers to the petiole and a finely pointed apex. The leaf has acute side-veins and the reticulation usually obscured by many island oil glands.[4] It blooms between November and April producing white flowers.[1] Each axillary unbranched inflorescence contains 9 to 13 buds per umbel. The narrowly cylindrical mature buds are {{cvt|0.3|to|0.7|cm|abbr=on}} in length and {{cvt|0.3|to|0.7|cm|abbr=on}} wide with a scar present. The operculum has a conical to rounded shape with inflexed stamens and oblong anthers. After flowering narrowly cylindrical to barrel-shaped fruit form with a length of {{cvt|0.3|to|0.6|cm|abbr=on}} and a width of {{cvt|0.3|to|0.4|cm|abbr=on}}with a verticall descending disc and three enclosed valves. The pale golden-brown seeds have a flattened ovoid shape and a length of {{cvt|0.5|to|1.3|mm}}.[4] TaxonomyThe species was first formally described by the botanist Ian Brooker in 1981 as part of the work A new series, Ovulares, of the genus Eucalyptus based on the subseries Ovulainae Pryor & Johnson as published in the journal Brunonia.[2] The specific epithet is taken from the Greek word myri meaning many and adena meaning glands in reference to the high number of oil glands in the leaves of the plant.[3] E. myriadena is part of the subgenus Symphyomyrtus section Dumaria in a sub-group of nine closely related species called series Ovulares. The rough barked members of this series include E. myriadena, Eucalyptus aequioperta, Eucalyptus brachycorys, Eucalyptus baudiniana and Eucalyptus ovularis and smooth barked members include; Eucalyptus cyclostoma, Eucalyptus cylindrocarpa, Eucalyptus exigua and Eucalyptus oraria.[4]DistributionIt is found on plains and low rises and around clay flats and salt lakes and swamps in the Mid West, Wheatbelt and Goldfields-Esperance region of Western Australia where it grows in gravelly sandy-clay-loam soils.[1] It has a scattered distribution from Coorow in the north west to Ravensthorpe in the south extending to Coolgardie in the east.[3] E. myriadena is part of open woodland communities occurring as part of the overstorey along with other trees and mallees including; Eucalyptus salmonophloia, Eucalyptus loxophleba, Eucalyptus urna, Eucalyptus calycogona, Eucalyptus yilgarnensis, Eucalyptus celastroides and Eucalyptus vegrandis. Associated species in the variable understorey includes Rhagodia drummondii, Enchylaena lanata, Enchylaena tomentosa, Sclerolaena diacantha, Atriplex paludosa, Atriplex vesicaria, Austrostipa elegantissima, Actinobole uliginosum, Eremophila decipiens, Scaevola spinescens, Lycium australe, Melaleuca acuminata, Melaleuca lateriflora, Melaleuca lanceolata, Melaleuca pauperiflora and Maireana erioclada.[5]CultivationThe tree is available commercially in sapling or seed form.[6] The species is drought tolerant and can cope with saline soils.[3] It is also planted as an oil mallee to harvest to obtain Eucalyptus oil.[7] See also
References1. ^1 2 3 {{FloraBase|name=Eucalyptus myriadena|id=5717}} {{Taxonbar|from=Q15353397}}2. ^{{cite web|url=https://bie.ala.org.au/species/http://id.biodiversity.org.au/node/apni/2920233#names|title=Eucalyptus myriadena Brooker|accessdate=20 November 2018|work=Atlas of Living Australia|publisher=Global Biodiversity Information Facility}} 3. ^1 2 3 4 {{cite web|url=http://keyserver.lucidcentral.org:8080/euclid/data/02050e02-0108-490e-8900-0e0601070d00/media/Html/Eucalyptus_myriadena.htm|title=Eucalyptus myriadena|accessdate=20 November 2018|work=Euclid|publisher=CSIRO}} 4. ^{{cite web|url=http://keyserver.lucidcentral.org:8080/euclid/data/02050e02-0108-490e-8900-0e0601070d00/media/Html/Eucalyptus_baudiniana.htm|title=Eucalyptus baudiniana|accessdate=19 November 2018|work=Euclid|publisher=CSIRO}} 5. ^1 {{cite web|url=https://naturemap.dpaw.wa.gov.au/(F(LcWl3M3MlZGNjT5iOZXaLdvv1gZeCfJG__KWFG8DU-2rMTukFSyF-S2E4_LbXqniMMQqCkMbSFh04CrCpX50KAp_WMXgrTcAOyHzXWOZwzcSCMi2KDb3110jQrLIGMbnXZQLEUOZjB7toA1OXozEC9X1FYQ1))/resources/acc/communities/OTHERS/Eucalyptus_myriadena__(Blackbutt)_Woodland.htm|title=Eucalyptus myriadena (Blackbutt) Woodland|accessdate=20 November 2018|work=Wheatbelt Woodlands|publisher=Department of Environment and Conservation}} 6. ^{{cite web|url=https://westgrow.com.au/product/eucalyptus-myriadena/|title=Eucalyptus Myriadena|accessdate=20 November 2018|publisher=Westgrow Farms Trees}} 7. ^{{cite web|url=http://www.oilmallee.org.au/oil-mallee-database/mullan-1998-eucalyptus-myriadena|title=Planting detail|accessdate=20 November 2018|publisher=Oil Mallee Australia}} External links
6 : Rosids of Western Australia|Trees of Australia|Eucalyptus|Myrtales of Australia|Plants described in 1981|Taxa named by Ian Brooker |
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