Isopogon uncinatus

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Albany cone bush
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Isopogon
Species:
I. uncinatus
Binomial name
Isopogon uncinatus
Isopogon uncinatusDistMap38.png
Occurrence data from Australasian Virtual Herbarium
Synonyms [1]

Isopogon uncinatus, commonly known as Albany cone bush, [2] is a species of flowering plant in the family Proteaceae and is endemic to a restricted area near Albany in Western Australia. It is a small shrub with very short stems, linear to egg-shaped leaves with the narrower end towards the base, and spherical heads of yellowish flowers. It is the rarest isopogon and was thought to be extinct until rediscovered in the 1980s.

Contents

Description

Isopogon uncinatus is a spreading shrub that typically grows to about 30–50 cm (12–20 in) and wide and has very short, densely hairy, brownish branchlets. The leaves are linear to egg-shaped with the narrower end towards the base, 80–320 mm (3.1–12.6 in) long, and 3–9 mm (0.12–0.35 in) wide, usually with a hooked tip, especially when young. The flowers are arranged in sessile, spherical heads 25–30 mm (0.98–1.18 in) in diameter, surrounded by clusters of leaves near the base of the plant. The flowers are up to 25 mm (0.98 in) long and yellowish, glabrous near the base but densely silky-hairy near the tip. Flowering has been recorded in October and the fruit is a hairy nut, fused with others in a more or less spherical head up to 12 mm (0.47 in) in diameter. [2] [3] [4]

Taxonomy

Isopogon uncinatus was first formally described in 1830 by Robert Brown in the Supplementum to his Prodromus Florae Novae Hollandiae et Insulae Van Diemen from material collected by William Baxter at King George's Sound. [5] [6] The specific epithet (uncinatus) means "hooked". [7]

Distribution and habitat

Albany cone bush grows in stunted jarrah scrub in swampy depression and on hillslopes near Albany where it is only known from nine small populations. [2] [3] [4] [8]

Conservation status

This is the rarest isopogon and was thought to be extinct until rediscovered in the 1980s. It is listed as "critically endangered" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 and as "Threatened Flora (Declared Rare Flora — Extant)" by the Department of Environment and Conservation (Western Australia). The main threats to the species are disease caused by Phytophthora cinnamomi , inappropriate fire regimes and drought. [2] [4] [8]

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References

  1. 1 2 "Isopogon uncinatus". Australian Plant Census. Retrieved 29 November 2020.
  2. 1 2 3 4 Phillimore, Robyn; Brown, Andrew. "Albany Cone Bush (Isopogon uncinatus) Interim Recovery Plan" (PDF). Australian Government Department of the Environment. Retrieved 29 November 2020.
  3. 1 2 Foreman, David B. "Isopogon uncinatus". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 25 November 2020.
  4. 1 2 3 "Isopogon uncinatus". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  5. ↑ "Isopogon uncinatus". APNI. Retrieved 29 November 2020.
  6. ↑ Brown, Robert (1830). Supplementum primum prodromi florae Novae Hollandiae. London. p. 8. Retrieved 29 November 2020.
  7. ↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 331. ISBN   9780958034180.
  8. 1 2 Lightfoot, David (May 2006). "Editorial" (PDF). Isopogons and Petrophiles. 8: 2. Retrieved 29 November 2020.
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