Olearia astroloba

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Marble daisy-bush
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Olearia astroloba
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Olearia
Species:
O. astroloba
Binomial name
Olearia astroloba
Synonyms [1]
  • Olearia sp. (Nunniong)
  • Olearia sp. 3 (NE of Mt Simpson)
Flower detail OleariaAstroloba BotGartenMelbourne-20171124-1b.jpg
Flower detail

Olearia astroloba, commonly known as marble daisy-bush, [2] is a species of flowering plant in the family Asteraceae and is endemic to a restricted area of Victoria in Australia. It is a greyish shrub with sessile, spatula-shaped leaves and mauve or violet and purple, daisy-like inflorescences.

Contents

Description

Olearia astroloba is a shrub that typically grows to a height of up to about 0.5 m (1 ft 8 in) and has more or less sessile, greyish-green, spatula-shaped leaves 5–18 mm (0.20–0.71 in) long and 3–10 mm (0.12–0.39 in) wide, often with teeth or shallow lobes near the tip. The lower surface of the leaves is densely covered with woolly, star-shaped hairs. The heads are arranged on the ends of branchlets and are 15–35 mm (0.59–1.38 in) in diameter and sessile, with an involucre 5.5–7.5 mm (0.22–0.30 in) in diameter at the base. Each head or daisy-like "flower" has 12 to 24 ray florets, the mauve or violet, petal-like ligule 7–14 mm (0.28–0.55 in) long, surrounding 12 to 45 purple disc florets. Flowering occurs between June and July although flowers continue to appear until March and the fruit is a dark purplish achene, the pappus bristles 4–5 mm (0.16–0.20 in) long. [2] [3] [4] [5]

Taxonomy

Olearia astroloba was first formally described in 1989 by Nicholas Sean Lander and Neville Grant Walsh in the journal Muelleria based on plant material collected from Marble Gully in 1988. [4] [6] The specific epithet (astroloba) means "star-shaped lobes", referring to the hairs on the disc florets. [7]

Distribution and habitat

Marble daisy-bush is restricted to Marble Gully, near Mount Tambo in East Gippsland, Victoria. It grows on skeletal soils on steep north-facing slopes at an altitude of about 600 m (2,000 ft) near the headwaters of the Tambo River. Associated plant species are Allocasuarina verticillata , Eucalyptus nortonii , Pomaderris oraria subsp. calcicola, Ozothamnus adnatus and Themeda triandra . [3] [5]

Conservation

Olearia astroloba is listed as "vulnerable" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 and as "threatened" under the Victorian Government Flora and Fauna Guarantee Act 1988 . The total population is estimated to be 1,030 plants within a 40 hectare area. Potential threats include inappropriate fire regimes, weed invasion, grazing by stock and rabbits and mining for marble. [5]

Use in horticulture

The species prefer a well-drained position in full sun or part shade. It is able to withstand drought and moderate frost. Pruning promotes new growth and increased flowering. Propagation is by cuttings or seed, though a large percentage of the latter is often non-viable. [7]

Related Research Articles

<i>Olearia axillaris</i> Species of plant

Olearia axillaris, commonly known as coastal daisy-bush, coast daisy-bush or coastal daisybush is a species of flowering plant in the family Asteraceae and is endemic to coastal areas of Australia. It is an erect, bushy shrub with densely cottony-hairy branchlets, aromatic, linear to narrowly elliptic or narrowly lance-shaped to egg-shaped leaves with the narrower end towards the base and small white and yellow, daisy-like inflorescences.

<i>Olearia ramulosa</i> Species of flowering plant

Olearia ramulosa, commonly known as twiggy daisy-bush, is a species of flowering plant in the family Asteraceae and is endemic to south-eastern Australia. It is a shrub with narrowly elliptic, linear or narrowly egg-shaped leaves, and pale blue, mauve or white and yellow, daisy-like inflorescences.

<i>Olearia microphylla</i> Species of shrub

Olearia microphylla, commonly known as snow bush, small-leaved daisy-bush or twiggy daisy-bush, is a species of flowering plant in the family Asteraceae and is endemic to eastern Australia. It is a shrub with spatula-shaped leaves with the edges rolled under, and white and yellow, daisy-like inflorescences.

<i>Olearia glutinosa</i> Species of plant

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<i>Olearia myrsinoides</i> Species of shrub

Olearia myrsinoides, commonly known as silky daisy-bush or blush daisy bush, is a species of flowering plant in the family Asteraceae and is endemic to south-eastern Australia. It is a spreading shrub with hairy branchlets, egg-shaped to elliptic leaves with toothed edges, and white and yellow or mauve, daisy-like inflorescences.

<i>Olearia decurrens</i> Species of shrub

Olearia decurrens, commonly known as the clammy daisy bush, is a species of flowering plant in the family Asteraceae and is endemic to arid, inland Australia. It is a glabrous, sticky, twiggy shrub with narrow egg-shaped to linear leaves sometimes with toothed edges, and white and yellow, daisy-like inflorescences.

<i>Olearia iodochroa</i> Species of shrub

Olearia iodochroa, commonly known as the violet daisy bush, is a species of flowering plant in the family Asteraceae and is endemic to south-eastern continental Australia. It is a shrub with branchlets densely covered with whitish hairs, narrowly egg-shaped leaves with the narrower end towards the base, and white or mauve, and cream-coloured, yellow or blue, daisy-like inflorescences.

<i>Olearia brevipedunculata</i> Species of shrub

Olearia brevipedunculata, commonly known as the dusty daisy-bush, is a small shrub with whitish-grey foliage and white daisy-like flowers in summer. Mostly found in Victoria and scattered locations in New South Wales, Australia.

<i>Olearia muelleri</i> Species of Asteraceae

Olearia muelleri, commonly known as Mueller daisy bush, Mueller's daisy bush or Goldfields daisy, is a species of flowering plant in the family Asteraceae and is endemic to southern continental Australia. It is a compact or spreading shrub with scattered spatula-shaped to egg-shaped leaves with the narrower end towards the base, and white and yellow, daisy-like inflorescences.

<i>Olearia calcarea</i> Species of shrub

Olearia calcarea, commonly known as limestone daisy bush, is a species of flowering plant in the family Asteraceae and is endemic to southern continental Australia. It is a shrub with egg-shaped or broadly spoon-shaped leaves with toothed edges, and white and yellow, daisy-like inflorescences.

Olearia curticoma is a species of flowering plant in the family Asteraceae and is endemic to Victoria. It is an erect shrub with glabrous, sticky branchlets, linear leaves and white and yellow, daisy-like inflorescences.

<i>Olearia frostii</i> Species of shrub

Olearia frostii, commonly known as Bogong daisy-bush, is a species of flowering plant in the family Asteraceae and is endemic to Victoria in Australia. It is a low, often straggling shrub with egg-shaped leaves with the narrower end towards the base, and mauve to pink and yellow, daisy-like inflorescences.

Olearia incana is a species of flowering plant in the family Asteraceae and is endemic to southern Australia. It is a shrub with narrowly elliptic or wedge-shaped leaves and white and pale yellow, daisy-like inflorescences.

<i>Olearia lanuginosa</i> Species of flowering plant

Olearia lanuginosa is a species of flowering plant in the family Asteraceae and is endemic to southern Australia. It is an erect shrub with egg-shaped leaves and white to mauve and yellowish, daisy-like inflorescences.

<i>Olearia lepidophylla</i> Species of flowering plant

Olearia lepidophylla, commonly known as club-moss daisy-bush, is a species of flowering plant in the family Asteraceae and is endemic to southern Australia. It is a rigid, erect to spreading shrub with tiny oblong to egg-shaped leaves and white and yellow, daisy-like inflorescences.

<i>Olearia passerinoides</i> Species of plant

Olearia passerinoides, commonly known as slender daisy bush, is a species of flowering plant in the family Asteraceae and is endemic to southern continental Australia. It is a slender, sticky shrub with linear leaves, and white or pale mauve and mauve or pink daisy flowers.

Olearia picridifolia, commonly known as rasp scrub-daisy, is a species of flowering plant in the family Asteraceae and is endemic to southern continental Australia. It is a low, spreading shrub with narrowly egg-shaped or narrowly elliptic leaves, and blue, mauve or white and yellow, daisy-like inflorescences.

<i>Olearia rudis</i> Species of plant

Olearia rudis, commonly known as azure daisy-bush, is a species of flowering plant in the family Asteraceae and is endemic to eastern Australia. It is a usually short-lived shrub with crowded elliptic or egg-shaped leaves, and pale blue, mauve or purple and orange, daisy-like inflorescences.

<i>Olearia stenophylla</i> Species of plant

Olearia stenophylla is a species of flowering plant in the family Asteraceae and is endemic to New South Wales. It is a shrub with oblong to linear leaves, and white and yellow, daisy-like inflorescences.

<i>Olearia subspicata</i> Species of Asteraceae

Olearia subspicata, commonly known as spiked daisy bush or shrubby daisy-bush, is a species of flowering plant in the family Asteraceae and is endemic to continental Australia. It is an erect shrub with more or less linear leaves and white and yellow, daisy-like inflorescences.

References

  1. 1 2 "Olearia astroloba". Australian Plant Census. Retrieved 28 February 2022.
  2. 1 2 "Conservation Advice (marble daisy-bush)" (PDF). Australian Government Department of Primary industries, Water and the Environment. Retrieved 27 February 2022.
  3. 1 2 Walsh, Neville G.; Lander, Nicholas S. "Olearia astroloba". Royal Botanic Gardens Victoria. Retrieved 27 February 2022.
  4. 1 2 Lander, Nicholas S.; Walsh, Neville G. (1989). "Olearia astroloba (Asteraceae: Astereae), a new species endemic to Victoria". Muelleria. 7 (1): 123–125. Retrieved 27 February 2022.
  5. 1 2 3 Carter, Oberon; Neville Walsh (November 2006). "National Recovery Plan for the Marble Daisy-bush Olearia astroloba" (PDF). Department of Sustainability and Environment (Victoria). Retrieved 28 February 2022.
  6. ↑ "Olearia astroloba". APNI. Retrieved 28 February 2022.
  7. 1 2 Busby, Nicole. "Olearia astroloba". Growing Native Plants. Australian National Botanic Gardens. Retrieved 3 August 2011.
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