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Species profile—Micromyrtus rotundifolia

Classification

Plantae (plants) → Equisetopsida (land plants) → MyrtaceaeMicromyrtus rotundifolia

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Species details

Kingdom
Plantae (plants)
Class
Equisetopsida (land plants)
Family
Myrtaceae
Scientific name
Micromyrtus rotundifolia A.R.Bean
WildNet taxon ID
5658
Nature Conservation Act 1992 (NCA) status
Vulnerable
Back on Track (BoT) status
Low
Conservation significant
Yes
Confidential
No
Endemicity
Native
Pest status
Nil
Short Notes
status annotated by author
Description
Micromyrtus rotundifolia is a shrub to 0.4 to 2.5 m high. The branchlets are not pendulous. The bark is grey, loose and fibrous at the base of large plants; otherwise closely adhering, with shallow longitudinal fissures. The stem flanges are grey, convex, not winged, not warty with the margins entire. The leaves are opposite, more or less orbicular, 0.9 to 1.2 by 0.7 to 1 mm, concavo-convex or plano-convex, glabrous with a few oil glands per leaf; apex obtuse; margins entire or rarely denticulate; petioles absent. The flowers are 2.5 to 3.5 mm across, solitary, axillary, with peduncles 0.5 to 1.5 mm long; bracteoles 2, 0.5 to 0.9 mm long, membranous, deciduous. The hypanthium is not compressed, obconical, 1 to 1.5 mm long, curved; ribs 5 to 6 in proximal half, often dividing at distal end. Calyx lobes 5 to 6, semi-orbicular, 0.3 by 0.5 to 0.6 mm, transparent, margins entire or slightly fimbriate. Petals 5 to 6, obovate to orbicular, 1 to 1.5 by 1 to 1.5 mm, keeled, white, oil glands present or absent; margins conspicuously fimbriate. Disc flat, slightly oblique. Stamens 5 to 6, opposite the petals; filaments terete, 0.6 to 0.8 mm long; anthers versatile; connective gland small, brown, less than half length of the anther, with two lateral lobes. Style 0.4 to 0.5 mm long, terete; stigma capitate. Ovules 6, radially arranged around a small apical placenta. Fruits and seeds not seen (Bean, 1997).
Micromyrtus rotundifolia differs from all other species in the M. leptocalyx group by the following features; its leaves are only slightly longer than they are wide, both the petals and calyx lobes are fimbriate, and its flowers are frequently hexamerous (Bean, 1997).
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Distribution
Micromyrtus rotundifolia extends from near Lake Buchanan to north east of Adavale, but it is rare within its range (Queensland Herbarium, 2011). The species has not been found within any National Park (Queensland Herbarium, 2012).
Distributional limits
-21.9031739, 144.9444444
-25.4277778, 146.876136
Range derivation
Range derived from extent of the taxon's verified records
Habitat
Micromyrtus rotundifolia grows either in shrubland with Calytrix spp. and Acacia julifera subsp. curvinervia or in woodland with Acacia catenulata, Eucalyptus exserta and Corymbia trachyphloia, on 'breakaways' associated with the Great Dividing Range. In both cases, the soils are shallow and sandy (Bean, 1997; Queensland Herbarium, 2012).
Reproduction
Flowers have been recorded in February, August and September (Queensland Herbarium, 2012).
Status notes
Micromyrtus rotundifolia is listed as Vulnerable under the Queensland Nature Conservation Act 1992.
Notes
Occurs in the following Queensland pastoral districts: Mitchell, South Kennedy, Warrego.
References
Bean, A.R. (1997). A revision of Micromyrtus Benth. (Myrtaceae) in Queensland. Austrobaileya 4 (4): 460-462.
Queensland Herbarium (2012). Specimen label information. Queensland Herbarium. Accessed 07/03/2012.
Profile author
Ronald Booth (20/03/2012)

Other resources

The Australasian Virtual Herbarium (AVH)
Atlas of Living Australia

Data source

This profile data is sourced from the QLD Wildlife Data API using the Get species by ID function used under CC-By 4.0
https://apps.des.qld.gov.au/species/?op=getspeciesbyid&taxonid=5658

This information is sourced from the WildNet database managed by the Queensland Department of Environment and Science.

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Licence
Creative Commons Attribution 4.0 International (CC BY 4.0)
Last updated
23 October 2019
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