Olearia elliptica

Sticky daisy bush
Olearia elliptica in the Oxley Wild Rivers National Park
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Olearia
Species:
O. elliptica
Binomial name
Olearia elliptica

Olearia elliptica, commonly known as the sticky daisy bush,[2] is a shrub in the family Asteraceae and is native to New South Wales and Queensland in eastern Australia. It has scattered, sticky leaves and white flowers in summer and autumn.

Habit

Description

Olearia elliptica is a shrub that typically grows to a height of 2 m (6 ft 7 in) and has scattered, curved, elliptic leaves 20–115 mm (0.79–4.53 in) long, 5–38 mm (0.20–1.50 in) wide on a petiole up to 12 mm (0.47 in) long. The upper surface of the leaves is sticky and the lower surface is a paler green. The heads or daisy-like "flowers" are arranged in loose groups on the ends of branches on a peduncle up to 12 mm (0.47 in) long and are 11–26 mm (0.43–1.02 in) wide. Each head has 8 to 23 white ray florets surrounding 8 to 30 yellow disc florets. Flowering occurs between November and May and the fruit are bristly achenes.[2]

Taxonomy and naming

Olearia elliptica was first formally described in 1836 by Augustin Pyramus de Candolle who published the description in his 17-volume treatise, Prodromus Systematis Naturalis Regni Vegetabilis.[3][4] The specific epithet (elliptica) is a Latin word meaning "a defective circle" or "an ellipse".[5]

In 1993, Peter Shaw Green described two subspecies of O. elliptica that have been accepted by the Australian Plant Census:[6]

  • Olearia elliptica subsp. elliptica has more heads of flowers in the corymb (between 20 and 50) and occurs in continental New South Wales and Queensland;[7]
  • Olearia elliptica subsp. praetermissa is a smaller plant with between 8 and 15 flowers in the corymb and is endemic to Lord Howe Island.[8][9] The epithet praetermissa is a Latin word meaning "overlooked", referring to the distinctness of this subspecies having only been recognised recently.[6]

Distribution and habitat

Subspecies elliptica occurs from Berry northwards along central and eastern New South Wales to the Queensland border.[2] It is found in areas of annual rainfall of over 900 mm in the Sydney Basin.[10]

Use in horticulture

Sticky daisy bush adapts readily to cultivation, preferring acidic soils in part shade or sun.[9]

References

  1. ^ "Olearia elliptica". Australian Plant Census. Retrieved 14 April 2019.
  2. ^ a b c Lander, Nicholas Sèan. "Olearia elliptica". Royal Botanic Garden Sydney. Retrieved 14 April 2019.
  3. ^ "Olearia elliptica". APNI. Retrieved 14 April 2019.
  4. ^ de Candolle, Augustin Pyramus (1836). Prodromus Systematis Naturalis Regni Vegetabilis (Volume 5). Paris: Sumptibus Sociorum Treuttel et Würtz. p. 271. Retrieved 14 April 2019.
  5. ^ Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 346.
  6. ^ a b Green, Peter Shaw (1993). "Notes Relating to the Floras of Norfolk & Lord Howe Islands, IV". Kew Bulletin. 48 (2): 311–312. doi:10.2307/4117938. JSTOR 4117938.
  7. ^ "Olearia elliptica subsp. elliptica". Australian Plant Census. Retrieved 14 April 2019.
  8. ^ "Olearia elliptica subsp. praetermissa". Australian Plant Census. Retrieved 14 April 2019.
  9. ^ a b Elliot, Rodger W.; Jones, David L.; Blake, Trevor (1997). Encyclopaedia of Australian Plants Suitable for Cultivation:Volume 7 – N-Po. Port Melbourne: Lothian Press. pp. 74–75. ISBN 0-85091-634-8.
  10. ^ Benson, Doug; McDougall, Lyn (1994). "Ecology of Sydney Plant Species Part 2: Dicotyledon families Asteraceae to Buddlejaceae". Cunninghamia. 3 (4): 895.