Isopogon dubius

Pincushion coneflower
Isopogon dubius in the Dryandra Woodland
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Isopogon
Species:
I. dubius
Binomial name
Isopogon dubius
Occurrence data from Australasian Virtual Herbarium
Synonyms[1]
  • Atylus roseus (Lindl.) Kuntze
  • Petrophila dubia R.Br. orth. var.
  • Petrophile dubia R.Br.
  • Isopogon scaber auct. non Lindl.: Meisner, C.D.F. in Lehmann, J.G.C. (ed.)
Habit in the Wallaby Hills Nature Reserve, near York

Isopogon dubius, commonly known as pincushion coneflower,[2] 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.

Description

Isopogon dubius is a shrub that typically grows to a height of 0.5–1.5 m (1 ft 8 in – 4 ft 11 in) and has hairy reddish brown branchlets, the young branchlets and young leaves hairy. The leaves are deeply 3-lobed or pinnate, 25–55 mm (0.98–2.17 in) long on a petiole about 20 mm (0.79 in) long, the tips of the lobes, or of the leaflets, sharply-pointed. The flowers are arranged in sessile, more or less spherical heads 40–50 mm (1.6–2.0 in) in diameter with many hairy, egg-shaped involucral bracts at the base. The flowers are 25–30 mm (0.98–1.18 in) long, pink to reddish pink and glabrous. Flowering occurs from July to September and the fruit is a hairy nut, fused with others in hemispherical head up to 30 mm (1.2 in) in diameter.[2][3][4]

Taxonomy

Pincushion coneflower was first formally described in 1830 by Robert Brown who gave it the name Petrophile dubia in the Supplementum to his Prodromus Florae Novae Hollandiae et Insulae Van Diemen from specimens collected in 1827 near the Swan River, by Charles Fraser.[5][6] In 1917 George Claridge Druce changed the name to Isopogon dubius in The Botanical Exchange Club and Society of the British Isles Report for 1916.[7][8]

Distribution and habitat

Isopogon dubius grows in woodland and heath, mainly on the Darling Range from near Wongan Hills to Narrogin in the Avon Wheatbelt, Geraldton Sandplains, Jarrah Forest and Swan Coastal Plain in the south-west of Western Australia.[2][3]

Conservation status

This isopogon is classified as "not threatened" by the Government of Western Australia Department of Parks and Wildlife.[2]

Use in horticulture

Isopogon dubius was first cultivated in Europe in the 1800s. It prefers dry summers and excellent drainage and will tolerate moderate frosts. Full sun is required for the best flower display, although the plant can be grown in partial shade.[4]

References

  1. ^ a b "Isopogon dubius". Australian Plant Census. Retrieved 23 November 2020.
  2. ^ a b c d "Isopogon dubius". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. ^ a b Foreman, David B. "Isopogon dubius". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 23 November 2020.
  4. ^ a b "Isopogon dubius". Australian Native Plants Society (Australia). Archived from the original on 1 April 2021. Retrieved 23 November 2020.
  5. ^ "Petrophile dubia". APNI. Retrieved 23 November 2020.
  6. ^ Brown, Robert (1830). Supplementum primum prodromi florae Novae Hollandiae. London. p. 7. Retrieved 22 November 2020.
  7. ^ "Isopogon dubius". Australian Plant Name Index. Retrieved 23 November 2020.
  8. ^ Druce, George C. (1917). "Nomenclatorial Notes: chiefly African and Australian". The Botanical Exchange Club and Society of the British Isles Report for 1916, Suppl. 2. Supplement 2: 629. Retrieved 23 November 2020.

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