Eucalyptus viminalis

Location & distribution maps

Phylogeny & links to associated information:

Wikipedia links:       Angiosperms > Eudicots > Rosids  >  Myrtaceae > Eucalyptus viminalis

Other links:     

Plant  information

Common name:                White Gum  

• Also,  Manna gum or Ribbon gum

Conservation status:  Near threatened

Etymology:   

• The name Eucalyptus is from the Ancient Greek words eu meaning 'good'and kalypto meaning '(I) cover, conceal, hide', referring to the operculum covering the flower buds

• The specific epithet (viminalis) is a Latin word meaning "bearing shoots or ribbons for wicker work

Flowers:                  

• The flower buds are arranged in groups of three or seven on an unbranched peduncle 4–10 mm long, the individual buds sessile or on pedicels up to 5 mm  long

• Mature buds are oval to spindle-shaped, 5–9 mm long and 3–6 mm wide with a conical, rounded or beaked operculum

• Flowering occurs from December to May and the flowers are white

Fruit:                         

• The fruit is a woody, cup-shaped or hemispherical capsule 3–8 mm long and 5–9 mm wide with the valves prominently protruding

Leaves:         

• Young plants and coppice regrowth have sessile, lance-shaped to curved or oblong leaves 

• 25–150 mm long, 5–35 mm wide and arranged in opposite pairs

• Adult leaves are arranged alternately

• They have the same shade of green on both sides

• They are lance-shaped to curved

• 85–232 mm long and 8–30 mm wide, tapering to a petiole 10–25 mm long

Stem & branches: 

• It has smooth bark, sometimes with rough, fibrous bark near the base

• Bark is smooth, often powdery, white to pale brown bark t

• It is shed in long ribbons, sometimes hanging on the upper branches

Roots:         

Habit:        

• A species of small to very tall tree 

• It  typically grows to a height of 50 m, sometimes to 90 m, and forms a lignotuber

Habitat:   

Distribution:                  

• Endemic to south-eastern Australia

• Subspecies:

  • Subspecies cygnetensis (Rough-barked manna gum), grows in the higher rainfall areas of South Australia, including Kangaroo Island and the southern Mount Lofty Ranges and as far east as the Grampians in Victoria

  • Subspecies hentyensis, (Western Tasmanian sand gum), grows in sandy soil on the west coast of Tasmania, north from Strahan

  • Subspecies pryoriana, (Gippsland manna gum), grows in sandy, coastal soil from the Bellarine Peninsula to Lake Tyers in the Gippsland Lakes in Victoria

  • Subspecies siliceana is known only from the Wail State Forest in the Wimmera region of Victoria, where it grows in deep sand

  • Subspecies viminalis is widely distributed and abundant in the well-watered areas of south-eastern Australia, from the coast and ranges of NSW, the southern half of Victoria, the Eyre Peninsula and Kangaroo Island in south-eastern South Australia; it also occurs in Tasmania where some are almost 90 m tall

Additional notes:     

• Taxonomy and naming

  • Eucalyptus viminalis was first formally described in 1806 by Jacques Labillardière in his book Novae Hollandiae Plantarum Specimen

  • The following subspecies are accepted by the Australian Plant Census:

    • Eucalyptus viminalis subsp. cygnetensis Boomsma is a spreading tree to 20 m with rough bark on the lower half of the trunk, and flower buds usually in groups of 7

    • Eucalyptus viminalis subsp. hentyensis has little rough bark, coarse, broad juvenile leaves and flower buds in groups of 3 or 7

    • Eucalyptus viminalis subsp. pryoriana, previously known as Eucalyptus pryoriana is a spreading tree to 15 m tall, with rough bark and flower buds in groups of 3

    • Eucalyptus viminalis subsp. siliceana is a shady tree to 15 m tall with rough bark on the trunk, flower buds in groups of 3 & 7, fruit 4–6 mm wide and glaucous tip on the seedlings; according to VicFlora,, this subspecies is endangered

    • Eucalyptus viminalis subsp. viminalis is most easily distinguished by it many pairs of sessile, lance-shaped, green juvenile leaves that are arranged in opposite pairs. It is also usually smooth-barked and has flower buds mostly in groups of 3

  • According to the early Australian ethnographer Alfred William Howitt, the name wurundjeri, in his transcription urunjeri, refers to E. viminalis which is common along Birrarung. Some modern reports of Wurundjeri traditional lore state that their ethnonym combines a word, wurun, meaning manna gum and djeri, a species of grub found in the tree, and take the word therefore to mean "Witchetty Grub People"

• Uses

  • Indigenous Australians used the wood of the tree to make shields and wooden bowls

  • The 1889 book The Useful Native Plants of Australia records that common names included white gum or swamp gum of Tasmania, manna gum, grey gum, blue gum, and drooping gum. It also states that "From the bark of this tree a kind of manna exudes; it is a crumbly white substance, of a very pleasant, sweet taste, and in much request by the aborigines

  • A white, nearly opaque manna from the normal E. viminalis was found by Mr. Bauerlen at Monga, near Braidwood (NSW)

  • It is in small pieces, about the size of peas, but of irregular, flattened shape. In appearance it very much resembles lime which has naturally crumbled or slaked by exposure to a moist atmosphere. It is composed of an unfermentable sugar called Eucalin, which is peculiar to the sap of the Eucalyptus, together with a fermentable sugar, supposed to be Dextroglucose

  • The manna is derived from the exudation of the sap, which "drying in the hot parched air of the midsummer, leaves the sugary solid remains in a gradually increasing lump, which ultimately falls off, covering the ground in little irregular masses" 

  • This exudation of the sap is said by McCoy to take place from the boring of the "Great Black or Manna Cicada". The Hon. William Macleay of Sydney is, however, by no means of that opinion, as he thinks it cannot be doubted that the manna is the work of a gall-making Coccus

  • The subject requires clearing up, and it is to be hoped that a naturalist will give his earnest attention to the matter"

Sources of information:

• https://en.wikipedia.org/wiki/Eucalyptus_viminalis (2023)