| 词条 | Micromyrtus grandis |
| 释义 |
|image = |image_caption = |status = EN |status_system = EPBC |genus = Micromyrtus |species = grandis |authority = J.T.Hunter }} Micromyrtus grandis, the Severn River heath-myrtle, is a shrub in the myrtle family. It is found exclusively in the Severn River Nature Preserve and a property next to it, located around 60 km north-west of Glen Innes (Australia). It grows up to 1–4 metres tall, making it the largest plant in the genus Micromyrtus. The Severn River heath-myrtle is characterized by its fruit, which is 5-ribbed, and its broader leaves when compared to other nearby flora. Taxonomy and namingJohn T. Hunter described Micromyrtus grandis in 1996, after coming across a colony of Micromyrtus on a porphyritic ridge that did not correspond to any known species. He gave it the species name grandis as it was the largest species in the genus.[1] DescriptionMicromyrtus grandis grows as a shrub with an erect habit, reaching 1–4 metres tall.[2] The orange bark is stringy and shed in ribbons, which frequently curl.[2] The tiny leaves are 0.5 to 4 mm long by 0.5 to 1.5 mm wide. When held up to the light, their oil dots can be clearly seen in the leaf blade. The minuscule{{Clarify|reason=vague|date=December 2015}} flowers appear over winter and spring (July to September).[3]Distribution and habitatMicromyrtus grandis is found along one long ridge at an altitude of 600 to 750 m in the Severn River Nature Preserve and adjoining private farmland.[1] It grows in exposed locations in heath and open woodland, associated with such species as narrow-leaved ironbark (Eucalyptus crebra), stringybark she-oak (Allocasuarina inophloia), Acacia sp. aff. pubifolia">Acacia sp. aff. pubifolia, Johnson's grasstree (Xanthorrhoea johnsonii), and heath species Leptospermum novae-angliae, Micromyrtus sessilis and Leucopogon neo-anglicus.[3]It is gazetted as endangered by both New South Wales and Federal governments.[3] CultivationMicromyrtus grandis has been cultivated at the Australian National Botanic Gardens in Canberra since 1998, proving hardy and easy to grow, and can be propagated by seed or cutting.[2]References1. ^1 {{cite journal |author1=Hunter, John T. |author2=Quinn, Francis C. |author3=Bruhl, Jeremy J. |year=1996|title= Micromyrtus grandis (Myrtaceae), a new species from New South Wales|journal = Telopea |volume=7|issue=1|pages= 77–81}} {{Taxonbar|from=Q15372281}}2. ^1 {{cite web|url=https://www.anbg.gov.au/gnp/interns-2005/micromyrtus-grandis.html|title=Micromyrtus grandis|last=Jalaluddin|first=Susan |date=2012|work=Information about Australia's Flora: Growing Native Plants|publisher=Australian National Botanic Gardens and Centre for Australian National Biodiversity Research|accessdate=4 November 2015}} 3. ^1 2 3 {{cite web|url=http://www.environment.nsw.gov.au/threatenedSpeciesApp/profile.aspx?id=10528|title=Severn River Heath-myrtle|access-date=2 November 2015|publisher=New South Wales Office of Environment and Heritage|date=26 August 2014}} 3 : Myrtales of Australia|Micromyrtus|Flora of New South Wales |
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