Isopogon pruinosus

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Isopogon pruinosus
Isopogon pruinosus subsp. glabellus - Flickr - Kevin Thiele.jpg
Isopogon pruinosus subsp. glabellus
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Isopogon
Species:
I. pruinosus
Binomial name
Isopogon pruinosus
Isopogon pruinosusDistMap30.png
Occurrence data from Australasian Virtual Herbarium
Synonyms [1]

Isopogon sp. 'Watheroo' (D.Foreman 477) auct. non WA Herbarium

Contents

Isopogon pruinosus is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a compact, spreading shrub with narrow egg-shaped leaves with the narrower end towards the base and spherical to elliptic heads of pink flowers.

Description

Isopogon pruinosus is a shrub that typically grows to about 2 m (6 ft 7 in) high and wide, with more or less glabrous, brownish branchlets. The leaves are glaucous, arranged alternately along the branchlets, and have smooth edges. The leaves are narrow egg-shaped with the narrower end towards the base, 30–85 mm (1.2–3.3 in) long and 6–20 mm (0.24–0.79 in) wide, tapering to a petiole that expands towards its base. The flowers are arranged in sessile, spherical to elliptic heads of sixteen to thirty-two flowers, the heads 15–25 mm (0.59–0.98 in) in diameter with three to four whorls of broadly egg-shaped involucral bracts at the base. The flowers are red or pink and hairy, the hairs pressed against the surface. The fruit is a hairy nut about 3.5 mm (0.14 in) long, fused with others in a spherical head 8–12 mm (0.31–0.47 in) long in diameter. [2]

Taxonomy

Isopogon pruinosus was first formally described in 2010 by the botanists Michael Hislop and Barbara Rye in the journal Nuytsia . [2] [3] In the same journal, Hislop and Rye described two subspecies and the names are accepted at the Australian Plant Census.

The specific epithet (pruinosus) means "frosted or covered with hoar frost", and refers to the white coating that is usually present on this species. The subspecies epithet glabellus means "without hairs" and refers to the almost glabrous involucral bracts of that subspecies. [2]

Distribution and habitat

Both subspecies of Isopogon pruinosus grow in heath or mallee woodland in the Avon Wheatbelt, Esperance Plains and Mallee biogeographic regions. Subspecies glabellus occurs from Corrigin to north of Hyden and subspecies pruinosus from south-west of Hyden to Frank Hann National Park with a disjunct population in the Fitzgerald River National Park. [2] [5] [7]

Conservation status

Both subspecies of I. pruinosus are classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife. [7] [8]

Related Research Articles

<i>Isopogon</i>

Isopogon, commonly known as conesticks, conebushes or coneflowers, is a genus of about forty species of flowering plants in the family Proteaceae, and are endemic to Australia. They are shrubs with rigid leaves, bisexual flowers in a dense spike or "cone" and the fruit is a small, hairy nut.

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<i>Banksia hirta</i> Species of shrub in the family Proteaceae endemic to Western Australia

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<i>Banksia squarrosa</i> Species of shrub in the genus Banksia native to Western Australia

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<i>Isopogon dubius</i> Species of shrub endemic to the south-west of Western Australia

Isopogon dubius, commonly known as pincushion coneflower, is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with sharply-pointed, deeply lobed or pinnate leaves and more or less spherical heads of pink to reddish pink flowers.

<i>Isopogon adenanthoides</i> Species of shrub endemic to the south-west of Western Australia

Isopogon adenanthoides, commonly known as the spider coneflower, is a plant in the family Proteaceae and is endemic to the southwest of Western Australia. It is an erect shrub with sharply-pointed, trifid leaves and spherical heads of pink flowers.

<i>Isopogon asper</i> Species of shrub endemic to southwest Western Australia

Isopogon asper is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a low shrub with crowded pinnate leaves and flattened spherical heads of glabrous pink flowers.

<i>Isopogon alcicornis</i> Species of shrub that is endemic to the south coast of Western Australia

Isopogon alcicornis, commonly known as the elkhorn coneflower, is a plant in the family Proteaceae and is endemic to part of the south coast of Western Australia. It is a low shrub with pinnately-lobed leaves and oval heads of hairy, white or pink flowers.

<i>Isopogon attenuatus</i> Species of shrub endemic to the southwest of Western Australia

Isopogon attenuatus is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with oblong to spatula-shaped or linear leaves and spherical heads of yellow flowers.

<i>Isopogon axillaris</i> Species of shrub endemic to the southwest of Western Australia

Isopogon axillaris is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with thick, linear to lance-shaped leaves with the narrower end towards the base and oval heads of pink or purple flowers.

<i>Isopogon baxteri</i> Species of shrub endemic to the southwest of Western Australia

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<i>Isopogon divergens</i> Species of shrub endemic to the southwest of Western Australia

Isopogon divergens, commonly known as spreading coneflower, is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with pinnate leaves and more or less spherical heads of glabrous pink flowers followed by an oval to cylindrical fruiting cone.

<i>Isopogon polycephalus</i> Species of shrub of the family Proteaceae endemic to southern Western Australia

Isopogon polycephalus, commonly known as clustered coneflower, is a species of plant in the family Proteaceae and is endemic to the south coast of Western Australia. It is a spreading shrub with linear to lance-shaped leaves with the narrower end towards the base, and clusters of more or less spherical heads of white, cream-coloured or yellow flowers.

<i>Isopogon crithmifolius</i> Species of shrub of the family Proteaceae endemic to the southwest of Western Australia

Isopogon crithmifolius is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with divided leaves and more or less spherical heads of glabrous reddish pink flowers.

<i>Isopogon scabriusculus</i> Species of shrub in the family Proteaceae that is endemic to southwestern Western Australia

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<i>Isopogon gardneri</i>

Isopogon gardneri is a plant in the family Proteaceae and is endemic to the southwest of Western Australia. It is a dense, prickly shrub with sharply-pointed, interlocking leaves and hairy, pale pink or yellow flowers.

<i>Isopogon heterophyllus</i>

Isopogon heterophyllus is a plant in the family Proteaceae and is endemic to the southwest of Western Australia. It is a shrub with simple or pinnate, cylindrical leaves and hairy, usually pink flowers.

Isopogon panduratus is a plant in the family Proteaceae and is endemic to the southwest of Western Australia. It is a spreading shrub with narrow egg-shaped leaves and spherical heads of pale pink flowers.

References

  1. 1 2 "Isopogon pruinosus". Australian Plant Census. Retrieved 26 November 2020.
  2. 1 2 3 4 5 Hislop, M. & Rye, B.L. (2010), Two new, glaucous-leaved species of Isopogon (Proteaceae: Proteoideae: Leucadendreae) from southwestern Australia. Nuytsia 20: 176–181
  3. "Isopogon pruinosus". APNI. Retrieved 26 November 2020.
  4. "Isopogon pruinosus subsp. glabellus". Australian Plant Census. Retrieved 26 November 2020.
  5. 1 2 "Isopogon pruinosus subsp. glabellus". FloraBase . Western Australian Government Department of Parks and Wildlife.
  6. "Isopogon pruinosus subsp. pruinosus". Australian Plant Census. Retrieved 26 November 2020.
  7. 1 2 3 "Isopogon pruinosus subsp. pruinosus". FloraBase . Western Australian Government Department of Parks and Wildlife.
  8. "Isopogon pruinosus". FloraBase . Western Australian Government Department of Parks and Wildlife.