Olearia pannosa

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Olearia pannosa
Olearia pannosa flowers.jpg
Subspecies pannosa in the Australian National Botanic Gardens
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Olearia
Species:
O. pannosa
Binomial name
Olearia pannosa
Synonyms [1]
  • Aster pannosus(Hook.) F.Muell.
  • Eurybia pannosa(Hook.) F.Muell. nom. inval.
  • Olearia lanceolata Sond. nom. inval., pro syn.
  • Steetzia pannosa(Hook.) Sond.
Subsp. cardiophylla near Staughton Vale Olearia pannosa cardiophylla.jpg
Subsp. cardiophylla near Staughton Vale

Olearia pannosa, commonly known as silver-leaved daisy or velvet daisy-bush, [2] is a species of flowering plant in the family Asteraceae and is endemic to south-eastern continental Australia. It is a spreading undershrub or shrub with egg-shaped or heart-shaped leaves, and white and yellow daisy flowers.

Contents

Description

Olearia pannosa is a spreading undershrub or shrub that typically grows to a height of up to 1 m (3 ft 3 in) and forms a root suckers. The branchlets are covered with woolly, Y-shaped hairs. The leaves are arranged alternately, egg-shaped or heart-shaped, 30–120 mm (1.2–4.7 in) long and 18–65 mm (0.71–2.56 in) wide on a petiole up to 22 mm (0.87 in) long, the upper surface becoming glabrous and the lower surface covered with hairs similar to those on the branchlets. The heads or daisy-like "flowers" are arranged singly on the ends of branches and are 35–75 mm (1.4–3.0 in) wide on a peduncle 5–25 mm (0.20–0.98 in) long, the involucre hemispherical and woolly-hairy. Each flower has 8 to 24 white ray florets and 18 to 50 yellow disc florets. Flowering occurs from September to November and the achenes are 5–8 mm (0.20–0.31 in) long, the pappus 8–10 mm (0.31–0.39 in) long. [2] [3]

Taxonomy

Olearia pannosa was first formally described in 1852 by William Jackson Hooker in his Icones Plantarum from specimens collected near the Murray River in South Australia. [4] [5]

In 1853, Ferdinand von Mueller described Eurybia cardiophylla in the journal Linnaea from specimens collected on Mount Remarkable in South Australia, [6] [7] but in 1986, David Cooke reduced this species to Olearia pannosa subsp. cardiophylla(F.Muell.) D.A.Cooke. That name, and that of the autonym (Olearia pannosaHook. subsp. pannosa(F.Muell.) D.A.Cooke) are accepted by the Australian Plant Census. [8] [9]

Distribution and habitat

Both subspecies of O. pannosa occur in the south-east of South Australia, but only subspecies cardiophylla occurs in Victoria, where it grows in dry forest on rocky sites in scattered locations. [2] [3]

Conservation status

Olearia pannosa subsp. pannosa is listed as "vulnerable" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 and the South Australian Government National Parks and Wildlife Act 1972 . Threats to this subspecies include habitat loss, weed invasion and inappropriate fire regimes. [10] Subspecies cardiophylla is listed as "vulnerable" in Victoria, under the Flora and Fauna Guarantee Act 1988 . [3]

Related Research Articles

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

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

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

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

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

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

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

Olearia asterotricha, commonly known as rough daisy-bush, is a species of flowering plant in the family Asteraceae. A tall shrub with white, mauve or blue daisy like flowers growing from the Blue Mountains in New South Wales to western Victoria, Australia.

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

Olearia canescens is a species of flowering plant in the family Asteraceae and is endemic to eastern Australia. It is a shrub with scattered elliptic or egg-shaped leaves, 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 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 rugosa</i> Species of flowering plant

Olearia rugosa, commonly known as wrinkled daisy-bush, is a species of flowering plant in the family Asteraceae. It has alternate, wrinkled leaves and white daisy-like flowers and is endemic to south-eastern Australia.

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

Olearia brachyphylla is a species of flowering plant in the family Asteraceae and is endemic to southern continental Australia. It is a densely-branched, aromatic shrub with woolly-hairy stems, oblong to egg-shaped leaves with the narrower end towards the base and small white and pale yellow, daisy-like inflorescences.

Olearia elaeophila is a species of flowering plant in the family Asteraceae and is endemic to the south-west of Western Australia. It is a small shrub with scattered linear leaves, and white or blue 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 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 tubuliflora</i> Species of plant

Olearia tubuliflora, commonly known as rayless daisy-bush, is a species of flowering plant in the family Asteraceae and is endemic to south-eastern continental Australia. It is a slender, erect shrub with linear or narrowly elliptic leaves and yellow, daisy-like inflorescences but with the ray florets lacking a ligule.

References

  1. 1 2 "Olearia pannosa". Australian Plant Census. Retrieved 22 June 2022.
  2. 1 2 3 "Olearia pannosa". State Herbarium of South Australia. Retrieved 22 June 2022.
  3. 1 2 3 Walsh, Neville G.; Lander, Nicholas S. "Olearia pannosa subsp. cardiophylla". Royal Botanic Gardens Victoria. Retrieved 22 June 2022.
  4. ↑ "Olearia pannosa". APNI. Retrieved 22 June 2022.
  5. ↑ Hooker, William Jackson (1852). Icones Plantarum. Vol. 9. London: Lovell Reeve & Co. p. 862. Retrieved 22 June 2022.
  6. ↑ "Eurybia cardiophylla". APNI. Retrieved 22 June 2022.
  7. ↑ von Mueller, Ferdinand (1853). "Diagnoses et descriptiones plantarum novarum, quas in Nova Hollandia". Linnaea: ein Journal für die Botanik in ihrem ganzen Umfange, oder Beiträge zur Pflanzenkunde. 25: 398. Retrieved 22 June 2022.
  8. ↑ "Olearia pannosa subsp. cardiophylla". Australian Plant Census. Retrieved 22 June 2022.
  9. ↑ "Olearia pannosa subsp. pannosa". Australian Plant Census. Retrieved 22 June 2022.
  10. ↑ "Approved Conservation Advice for Olearia pannosa subsp. pannosa (silver daisy-bush)" (PDF). Australian Government Department of Agriculture, Water and the Environment. Retrieved 22 June 2022.
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