Olearia occidentissima

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Olearia occidentissima
Status DECF P2.svg
Priority Two — Poorly Known Taxa (DEC)
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Olearia
Species:
O. occidentissima
Binomial name
Olearia occidentissima

Olearia occidentissima is a species of flowering plant in the family Asteraceae and is endemic to the extreme west of Western Australia. It is an erect or prostrate, wind-pruned shrub with narrowly elliptic leaves that are woolly-hairy on the lower surface, and white, daisy-like inflorescences.

Contents

Description

Olearia occidentissima is an erect or prostrate, wind-pruned shrub that typically grows up to 20 cm (7.9 in) high, its stems and leaves densely hairy. The leaves are arranged alternately, scattered along the branchlets, narrowly elliptic, mostly 6–24 mm (0.24–0.94 in) long and 3–6 mm (0.12–0.24 in) wide. The upper surface of the leaves is greyish-green and the lower surface covered with woolly hairs. The heads or daisy-like "flowers" are arranged singly on the ends of branches, the leaves grading to the hemispherical involucre at the base. Each head is 25–30 mm (0.98–1.18 in) in diameter with ten to twelve white or pink ray florets, the ligule 7.4–11 mm (0.29–0.43 in) long, surrounding about 25 disc florets. Flowering occurs in September and the fruit is an achene 2.5–2.8 mm (0.098–0.110 in) long, the pappus with about 75 bristles. [2] [3]

Taxonomy

Olearia occidentissima was first formally described in 1990 by Nicholas Sèan Lander in the journal Nuytsia from specimens collected by Alex George on Dirk Hartog Island in 1972. [2] [4] The specific epithet (occidentissima) means "most westerly", referring to this species having the most westerly distribution of Olearia species. [2] [5]

Distribution and habitat

This daisy bush grows on shallow soil on coastal limestone cliffs in the Carnarvon and Yalgoo bioregions in the extreme west of Western Australia, including on Dirk Hartog Island and Francois Peron National Park. [2] [3]

Conservation status

Olearia occidentissima is listed as "Priority Two" by the Western Australian Government Department of Biodiversity, Conservation and Attractions, [3] meaning that it is poorly known and from only one or a few locations. [6]

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 pimeleoides</i> Species of plant

Olearia pimeleoides, commonly known as pimelea daisy-bush, is a species of flowering plant in the family Asteraceae and is endemic to southern continental Australia. It is an erect shrub with elliptic, linear or lance-shaped leaves, and white and pale yellow, daisy-like inflorescences.

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

Olearia mooneyi, commonly known as pumpkin bush, is a species of flowering plant in the family Asteraceae and is endemic to Lord Howe Island. It is a shrub or small tree with hairy, elliptic to egg-shaped leaves with the narrower end towards the base, and white and pale yellow, daisy-like inflorescences.

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

Olearia exiguifolia commonly known as small-leaved daisy bush, is a species of flowering plant in the family Asteraceae and is endemic to south-western Australia. It is an erect or straggly shrub with broadly egg-shaped leaves with the narrower end towards the base, and white and yellow, daisy-like inflorescences.

Olearia arckaringensis, commonly known as Arckaringensis daisy, is a species of flowering plant in the family Asteraceae and is endemic to a restricted area of northern South Australia. It is a small, compact, rounded shrub with woolly-hairy foliage, coarsely-toothed, elliptic leaves and lavender or white and 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 eremaea is a species of flowering plant in the family Asteraceae and is endemic to inland areas of Western Australia. It is a shrub with scattered, more or less elliptic leaves, and white and yellow, daisy-like inflorescences.

Olearia fluvialis is a species of flowering plant in the family Asteraceae and is endemic to inland areas of northern Western Australia. It is a shrub with scattered, narrowly egg-shaped leaves, and white or mauve and yellow, daisy-like inflorescences.

Olearia gordonii is a species of flowering plant in the family Asteraceae and is endemic to inland southern Queensland. It is a small, erect, spreading shrub with linear leaves and blue, daisy-like inflorescences.

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

Olearia humilis is a species of flowering plant in the family Asteraceae and is endemic to the south-west of Western Australia. It is an erect, spindly shrub with narrowly egg-shaped or linear leaves, and purple 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.

Olearia incondita is a species of flowering plant in the family Asteraceae and is endemic to the south-west of Western Australia. It is a straggly shrub with narrowly elliptic leaves and white or pink and yellow, daisy-like inflorescences.

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

Olearia laciniifolia is a species of flowering plant in the family Asteraceae and is endemic to inland areas of the south-west of Western Australia. It is an erect shrub with scattered oblong leaves with small lobes on the edges, and lilac, white and yellow, daisy-like inflorescences.

Olearia lehmanniana is a species of flowering plant in the family Asteraceae and is endemic to inland areas of the south-west of Western Australia. It is a shrub with scattered elliptic or linear leaves that are densely hairy on the lower surface, and pale mauve, daisy-like inflorescences.

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

Olearia muricata, commonly known as rough-leaved daisy bush, is a species of flowering plant in the family Asteraceae and is endemic to the south-west of Western Australia. It is an erect shrub with flat, linear to triangular leaves, and white or pale mauve and yellow, daisy-like inflorescences.

Olearia newbeyi is a species of flowering plant in the family Asteraceae and is endemic to the south-west of Western Australia. It is a shrub with broadly linear to narrowly oblong leaves, and dull purple, daisy-like inflorescences.

Olearia plucheacea is a species of flowering plant in the family Asteraceae and is endemic to inland Western Australia. It is an erect, open shrub with scattered hairy, thread-like to linear leaves, and white and yellow daisy-like inflorescences.

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

Olearia ramosissima, commonly known as much-branched daisy bush, is a species of flowering plant in the family Asteraceae and is endemic to continental Australia. It is a straggly shrub with densely-crowded, elliptic, egg-shaped or triangular leaves, and blue to violet and blue or yellow, daisy-like inflorescences.

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

Olearia speciosa is a species of flowering plant in the family Asteraceae and is endemic to Victoria in Australia. It is a straggly, open shrub with egg-shaped to elliptic leaves, and white and yellow or brownish, 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. ↑ "Olearia occidentissima". Australian Plant Census. Retrieved 17 June 2022.
  2. 1 2 3 4 Lander, Nicholas S. (1990). "New species of Olearia (Asteraceae: Astereae) endemic to Western Australia". Nuytsia. 7 (2): 153–156. Retrieved 17 June 2022.
  3. 1 2 3 "Olearia occidentissima". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. ↑ "Olearia occidentissima". APNI. Retrieved 17 June 2022.
  5. ↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 264. ISBN   9780958034180.
  6. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 17 June 2022.
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