Isopogon attenuatus

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.

Isopogon attenuatus
In the Australian National Botanic Gardens
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Isopogon
Species:
I. attenuatus
Binomial name
Isopogon attenuatus
Occurrence data from Australasian Virtual Herbarium
Synonyms[1]
  • Atylus attenuatus (R.Br.) Kuntze
  • Isopogon attenuatus var. angustatus Meisn.
  • Isopogon attenuatus R.Br. var. attenuatus
  • Isopogon attenuatus var. dilatatus Meisn.
  • Isopogon attenuatus var. latebracteata Benth.

Description

Isopogon attenuatus is a shrub that typically grows to a height of 0.2–2 m (7.9 in–6 ft 6.7 in) and has mostly glabrous, brownish branchlets. The leaves are oblong to spatula-shaped or linear, 80–240 mm (3.1–9.4 in) long and 10–20 mm (0.39–0.79 in) wide on a petiole about 50 mm (2.0 in) long, with a sharp point on the tip. The flowers are arranged in sessile, more or less spherical heads 40–50 mm (1.6–2.0 in) in diameter. The involucral bracts are egg-shaped, the flowers 10–15 mm (0.39–0.59 in) long and creamy yellow to pale yellow. Flowering occurs from September to February and the fruit is a hairy nut, fused in a more or less spherical head about 25 mm (0.98 in) in diameter.[2][3]

Taxonomy

Isopogon attenuatus was first formally described in 1810 by Robert Brown in the Transactions of the Linnean Society of London.[4][5]

Distribution and habitat

This isopogon grows in woodland with a heathy understorey, in scattered population from near Perth to Albany and Mount Manypeaks, in the south-west of Western Australia.[2][3]

Conservation status

Isopogon attenuatus is classified as "not threatened" by the Government of Western Australia Department of Parks and Wildlife.[3]

References
  1. "Isopogon attenuatus". Australian Plant Census. Retrieved 20 November 2020.
  2. Foreman, David B. "Isopogon attenuatus". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 20 November 2020.
  3. "Isopogon attenuatus". FloraBase. Western Australian Government Department of Parks and Wildlife.
  4. "Isopogon attenuatus". APNI. Retrieved 20 November 2020.
  5. Brown, Robert (1810). "On the Proteaceae of Jussieu". Transactions of the Linnean Society of London. 10 (1): 73. Retrieved 20 November 2020.
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