Isopogon formosus

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Rose coneflower
Isopogon formosus 2.jpg
Isopogon formosus at San Francisco Botanical Garden
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Isopogon
Species:
I. formosus
Binomial name
Isopogon formosus
Isopogon formosusDistMap18.png
Occurrence data from Australasian Virtual Herbarium
Synonyms [1]
  • Atylus formosus(R.Br.) Kuntze
  • Isopogon formosus var. eriolepis Meisn.

Isopogon formosus, commonly known as rose coneflower, [2] is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with divided leaves with cylindrical segments, and spherical to oval heads of pink or red flowers.

Contents

Description

Isopogon formosus is an erect or spreading shrub that typically grows to a height of 1.5–2 m (4 ft 11 in–6 ft 7 in) with pale to reddish brown young branchlets. The leaves are up to 35 mm (1.4 in) long on a petiole up to 25 mm (0.98 in) long, and divided with grooved cylindrical segments that have a sharply-pointed tip. The flowers are arranged on the ends of branchlets or in upper leaf axils, in sessile, spherical to oval heads about 60 mm (2.4 in) in diameter with egg-shaped to lance-shaped involucral bracts at the base. The flowers are red or mauve-pink and more or less glabrous, and the fruit is a hairy nut fused with others in a spherical or oval head up to 20 mm (0.79 in) long in diameter. [3] [4] [2]

Taxonomy

Isopogon formosus was first formally described in 1810 by Robert Brown and the description was published in Transactions of the Linnean Society. [5] [6] The specific epithet (formosus) is a Latin word meaning "beautifully-formed" or "handsome". [7]

In 1995, Donald Bruce Foreman described two subspecies of I. formosus in the Flora of Australia , and the names are accepted by the Australian Plant Census:

Subspecies dasylepis was originally described in 1856 by Carl Meissner as I. formosus var. dasylepis in de Candolle's Prodromus Systematis Naturalis Regni Vegetabilis . [13] [14]

In a 2017 paper in the journal Nuytsia, Rye and Hislop reduced I. heterophyllus to a synonym of I. formosus subsp. formosus, but the change has not been accepted by the Australian Plant Census as at November 2020. [10]

Distribution and habitat

Rose coneflower grows in a range of soils in swampy places, rocky outcrops and on sandplains mainly between Bunbury and Esperance in the Esperance Plains and Jarrah Forest biogeographic regions. [3] Subspecies dasylepis occurs between Busselton, Noggerup and the Scott River and subsp. formosus in near-coastal areas between Walpole and Hopetoun and from Dalyup to Cape Arid National Park. [10]

Conservation status

Subspecies formosus is classified as "not threatened" [9] but subsp. dasylepis is classified as "Priority Three" by the Government of Western Australia Department of Parks and Wildlife [12] meaning that it is poorly known and known from only a few locations but is not under imminent threat. [15]

Use in horticulture

Isopogon formosus requires excellent drainage and full sun. It will not tolerate long periods of dryness or heavy frost. [2] [16]

Related Research Articles

<i>Isopogon</i> Genus of flowering plants

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.

<i>Isopogon cuneatus</i> Species of shrub endemic to an area around Albany in Western Australia

Isopogon cuneatus, commonly known as 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 oblong to egg-shaped leaves with the narrower end towards the base, and flattened-spherical heads of glabrous pale to purplish pink flowers.

<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 sphaerocephalus</i> Species of shrub endemic to the southwest part of Western Australia

Isopogon sphaerocephalus, commonly known as drumstick isopogon or Lesueur isopogon, is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with linear to narrow egg-shaped leaves and spherical heads of hairy white to creamy yellow 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 trilobus</i> Species of shrub that is endemic to south coastal regions of Western Australia


Isopogon trilobus, commonly known as barrel coneflower, is a species of flowering plant in the family Proteaceae and is endemic to South Coast Western Australia. It is a shrub with wedge-shaped leaves with lobed or toothed leaves, and oval, spherical or barrel-shaped heads of cream-coloured to yellow 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 Western Australia. It is a low shrub with pinnately-lobed leaves and oval heads of hairy, white or pink flowers.

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

Isopogon baxteri, commonly known as the Stirling Range coneflower, is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is an erect shrub with wedge-shaped, often 3-lobed, toothed leaves and flattened spherical heads of hairy pink flowers.

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

Isopogon teretifolius, commonly known as nodding coneflower, is a species of flowering plant in the family Proteaceae and is endemic to the southwest of Western Australia It is an erect shrub with cylindrical, sometimes branched leaves, and flattened-spherical heads of hairy pinkish flowers.

<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.

Petrophile filifolia is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a small shrub with curved, long, needle-shaped leaves and more or less spherical heads of hairy cream-coloured to pale yellow flowers.

Petrophile pilostyla is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a shrub with needle-shaped, sharply-pointed leaves and spherical heads of hairy, cream-coloured or pale yellow flowers.

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

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.

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

Isopogon scabriusculus is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a shrub with cylindrical, or narrow flat, sometimes forked leaves, and spherical to oval heads of pink or red flowers.

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

Isopogon tridens, commonly known as the three-toothed coneflower, is a species of flowering plant in the family Proteaceae and is endemic to the southwest of Western Australia. It is a shrub with wedge-shaped leaves with two or three sharply-pointed teeth, and flattened-spherical heads of glabrous creamy white, sometimes purple flowers.

Isopogon villosus is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a tufted shrub with cylindrical leaves with twenty-five to thirty-two widely diverging lobes, and oval heads of cream-coloured to yellow flowers.

<i>Isopogon heterophyllus</i> Species of shrub

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.

Isopogon robustus, commonly known as robust coneflower, is a plant in the family Proteaceae and is endemic to a restricted area in the southwest of Western Australia. It is a shrub with cylindrical leaves and oval heads of pink flowers.

References

  1. 1 2 "Isopogon formosus". Australian Plant Census. Retrieved 24 November 2020.
  2. 1 2 3 Corvisy, Rachael. "Isopogon formosus - Rose coneflower". Australian National Botanic Garden. Retrieved 13 October 2018.
  3. 1 2 "Isopogon formosus". FloraBase . Western Australian Government Department of Parks and Wildlife.
  4. ↑ Foreman, David B. "Isopogon formosus". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 28 November 2020.
  5. ↑ "Isopogon formosus". APNI. Retrieved 28 November 2020.
  6. ↑ Brown, Robert (1810). "On the Proteaceae of Jussieu". Transactions of the Linnean Society. 10: 72.
  7. ↑ Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 345.
  8. ↑ "Isopogon formosus subsp. dasylepis". Australian Plant Census. Retrieved 28 November 2020.
  9. 1 2 "Isopogon formosus subsp. dasylepis". FloraBase . Western Australian Government Department of Parks and Wildlife.
  10. 1 2 3 4 Rye, Barbara L.; Hislop, Michael (2017). "Two new synonyms in Western Australian Proteaceae: Isopogon heterophyllus and I. teretifolius subsp. petrophiloides". Nuytsia. 28: 169–172.
  11. ↑ "Isopogon formosus". Australian Plant Census. Retrieved 28 November 2020.
  12. 1 2 "Isopogon formosus subsp. formosus". FloraBase . Western Australian Government Department of Parks and Wildlife.
  13. ↑ "Isopogon formosus var. dasylepis". APNI. Retrieved 28 November 2020.
  14. ↑ Meissner, Carl; de Candolle, Augustus P. (1856). Prodromus Systematis Naturalis Regni Vegetabilis. Paris: Sumptibus Victroris Masson. p. 278. Retrieved 28 November 2020.
  15. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 28 November 2020.
  16. ↑ Wrigley, John W.; Fagg, Murray (1983). Australian native plants : a manual for their propagation, cultivation and use in landscaping (2nd ed.). Sydney: Collins. p. 249. ISBN   0002165759.
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