ClimateWatch

An initiative of Earthwatch Institute

  1. Flickr_julieburgher_mannagum_flowers Manna Gum flowers and adult leaves (Julieburgher, Flickr)
  2. Inaturalist_jan_mannagum_leaves Manna Gum adult leaves (Jan M, iNaturalist)
  3. Rbg_neil_blair_juvenille_leaves Manna Gum juvenile leaves (Neil Blair, Royal Botanic Gardens)
  4. Neil_blair_e.viminalis_buds Manna Gum buds (Neil Blair, Royal Botanic Gardens)
  5. Flickr_arthurchapman_mannagum_fruit Manna Gum fruit (Arthur Chapman, Flickr)
  6. Geoff_lay_eucalyptus_viminalis_subsp._viminalis_tree Manna Gum tree and bark (Geoff Lay)

Manna Gum

Eucalyptus viminalis

Appearance

  • Bark: usually smooth, white, peels in long ribbons; rough at base. 
  • Size: usually 40 metres tall, up to 50 metres tall, size is very variable
  • Adult leaves: long, narrow leaves, bright green, glossy
  • Juvenile leves: opposite, stalk-less, dull green, sword shaped
  • Flowers: not prolific, white flowers. Inflorescences (group of flowers) are axillary (arising from the meeting point of a leaf and a branch) on stalks 08.cm long, with 3-7 flowers per inflorescence
  • Buds: oval to spindle-shaped, 5-9mm long and 3-6mm wide
  • Fruit: cylindrical or ovoid, 4-8mm long and 4-9mm diameter, are released 3-8 weeks after maturity (Early July to late March), heavy seeding every 2-3 years

 

 

What to Observe

  • First fully open single flower
  • Full flowering (record all days)
  • End of flowering (when 95% of the flowers have faded)
  • No flowering

ClimateWatch Science Advisor

E. viminalis is a widespread species that is dying back across much of it’s geographic range, from the Monaro Region of NSW to the Midlands of Tasmania.  The reasons for this dieback differ across it’s range, including water stress and insect attack. 

When To Look

Flowers from January – May, mainly February – March

Note: ClimateWatch is looking for any changes in the timing of these events so remember to keep a lookout all year!

Where To Look

Mainly along watercourses in hilly country, and on deep fertile soils. Occurs also in grassy woodland or forest

Sightings

References

  • Costermans, L F 1966, Trees of Victoria, 3rd edn, Costermans L F, Melbourne.

  • Ross, C, What's killing the trees?: Is climate change the cause of Ribbon Gum (Eucalyptus viminalis) dieback in the Monaro region of NSW? [online]. Australasian Plant Conservation: Journal of the Australian Network for Plant Conservation, Vol. 23, No. 3, Dec 2014 - Feb 2015, pp. 23-25. Availability: <https://search-informit-com-au.ezproxy-b.deakin.edu.au/documentSummary;dn=131217514015975;res=IELHSS> ISSN: 1039-6500.

  • Woolshed Thurgoona Landcare Group

  • Atlas of Living Australia

  • Conservation Ecology Centre
  • Experts consulted: ClimateWatch Science Advisory Panel

Links

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  1. What Else?

    Can look similar to Candlebark Gum (E. rubida), which is distinguished by juvenile leaves, buds and fruit.

  1. Did You Know?

    viminalis means ‘willow like’.

    The foliage is the favoured food of the koala, they are high in protein.

    Across it’s distribution a number of endangered species rely on Manna Gum for food, including Leadbeater’s Possum, Helmeted Honeyeater, Forty Spotted Pardalotes, Yellow-bellied gliders and Sugar gliders.  These animals scratch or bite the bark to release the gum or ‘Manna’ as it is high in sugar content

    This species also provides valuable hollows for hollow-nesting birds and mammals.

    There are 5 subspecies, 4 of which are found in Victoria.