Eriostemon australasius

Eriostemon australasius commonly known as pink wax flower is a plant in the citrus family Rutaceae and is endemic to eastern Australia. It is an erect, bushy shrub with narrow oblong leaves, and pink flowers with five petals in late winter and early spring.

pink wax flower
Eriostemon australasius foliage and flowers
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Rosids
Order:
Sapindales
Family:
Rutaceae
Genus:
Eriostemon
Species:
E. australasius
Binomial name
Eriostemon australasius
Synonyms

  • Eriostemon australasius subsp. australasius

Description

Eriostemon australasius is an erect, bushy shrub which grows to a height of 1–2 m (3–7 ft). It has simple leaves that are narrow oblong in shape, 20–80 millimetres (0.8–3 in) long, 8–14 millimetres (0.3–0.6 in) long and are covered with tiny star-like hairs when young, although the hairs may only be visible with a magnifying glass. The flowers are arranged singly in leaf axils, mostly near the ends of the branches, on a stalk 4–12 millimetres (0.2–0.5 in) long. At the base of each flower are five to twelve sepal-like bracteoles. There are five pink to reddish petals which are about 18 millimetres (0.7 in) long and are covered with similar hairs to those on the leaves, but become smooth with maturity. Flowering occurs in late winter and early spring.[1][2]

Eriostemon australasius in the Gibraltar Range National Park

Taxonomy and naming

Eriostemon australasius was first formally described in 1805 by Christiaan Persoon and the description was published in Synopsis plantarum, seu enchiridium botanicum, complectens enumerationem systematicam specierum.[3][4] The specific epithet (australasius) is derived from the Latin word australis meaning "south".[5] The common name is derived from the thick waxy petals.[6]

Distribution and habitat

Pink wax flower grows in heathland and dry eucalyptus woodlands from Lake Conjola on the New South Wales south coast northwards along the coast to Fraser Island in Queensland.[2][6]

Use in horticulture

Eriostemon australasius was first cultivated in England in 1824. It adapts fairly readily to the garden situation, as long as it has good drainage, in dappled shade to full sun. The roots benefit from some shelter. It can be propagated from cuttings or from seed with difficulty and is moderately frost tolerant.[6][7]

References
  1. Robinson, Les (2003). Field guide to the native plants of Sydney (3rd (revised) ed.). East Roseville, NSW: Kangaroo Press. p. 118. ISBN 9780731812110.
  2. Weston, Peter H. "Eriostemon australasius". Royal Botanic Garden Sydney: plantnet. Retrieved 25 October 2016.
  3. "Eriostemon australasius". APNI. Retrieved 25 October 2016.
  4. Persoon, Christiaan Hendrik (1805). "Classis X, Decandria". Synopsis plantarum, seu enchiridium botanicum, complectens enumerationem systematicam specierum. 1: 465. Retrieved 25 October 2016.
  5. Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 112.
  6. Elliot Rodger W.; Jones, David L.; Blake, Trevor (1984). Encyclopaedia of Australian Plants Suitable for Cultivation:Volume 3 - Ce-Er. Port Melbourne: Lothian Press. pp. 470–72. ISBN 0-85091-167-2.
  7. "Eriostemon australasius". Australian Native Plants Society Australia. Retrieved 25 October 2016.
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