Hakea epiglottis

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Hakea epiglottis
Hakea epiglottis.jpg
Hakea epiglottis, Cape Raoul, Tasman Peninsula, Tasmania
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Hakea
Species:
H. epiglottis
Binomial name
Hakea epiglottis
Hakea epiglottisDistMap44.png
Occurrence data from AVH
Synonyms [1]
  • Conchium epiglottis(Labill.) Willd.
  • Conchium teretifoliumC.F.Gaertn.

Hakea epiglottis is a shrub commonly known as beaked hakea or needlebush hakea. [2] It is endemic to Tasmania, where populations consist of functional unisexual plants. A 1989 publication by John Wrigley & Murray Fagg states that specimens at Wakehurst Place, an annexe of Kew Gardens London, are believed to be 60-70 years old measuring 3 m (9.8 ft) high and wide.

Contents

Description

Hakea epiglottis grows to 3 m (10 ft) tall. The inflorescence on male plants have 2-8 flowers whereas female plants have 1-3 flowers. The bracts are 3–4 mm (0.3–0.4 cm) long on a stem about 1 mm (0.04 in) long. The flower stems are 3.5–5 mm (0.4–0.5 cm) long with flat white silky hairs extending on to sepals that are 2.5–4 mm (0.1–0.2 in) long and pale yellow inside. The pistil is recurved 5.5–6.5 mm (0.2–0.3 in) long. The style has a small pollen disc which is concave in male flowers but with a conical protuberance in female flowers. Fruit are shaped like the letter 'S' and are 1.4–2.6 cm (0.6–1 in) long. Needle-like leaves are 1.5–11 cm (0.6–4 in) long and 1–2 mm (0.04–0.08 in) wide. The young leaves are covered in rust-coloured hairs, which distinguishes this species from the similar Hakea megadenia . Unisexual populations have male plants which do not produce fruit but flowers that produce pollen. Female populations have fruit with no pollen. There are recorded populations of bisexual plants where the fruit occur together with flowers producing pollen. [3] Clusters of white through to bright yellow flowers appear in leaf axils in spring. [4]

Taxonomy and naming

The species was first formally described by Jacques Labillardière in Novae Hollandiae Plantarum Specimen in 1805. [5] The specific epithet (epiglottis) is derived from the Ancient Greek words epi meaning "upon" or "on" [6] :304 and glottis meaning "mouth of the windpipe" perhaps a reference to "a perceived resemblance of the fruit to the upper respiratory system". [4] [6] :538


There are two recognised subspecies:

Distribution and habitat

Hakea epiglottis is a common species found in all but the north-east coast of Tasmania growing in peaty heath. [7]

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References

  1. 1 2 "Hakea epiglottis". APC. Retrieved 19 March 2019.
  2. "Hakea epiglottis". Wildseed Tasmania. Retrieved 19 March 2019.
  3. "Hakea epiglottis". Understorey Communities. Conservation Volunteers Understorey Network Nursery. Retrieved 10 January 2019.
  4. 1 2 "Hakea epiglottis". Flora of South Australia, Australian Biological Resources Study. Department of Environment and Energy. Retrieved 10 January 2019.
  5. "Hakea epiglottis". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government, Canberra. Retrieved 2009-08-09.
  6. 1 2 Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press.
  7. "Hakea epiglottis". Key to Tasmania-Vascular Plants. University of Tasmania. Retrieved 10 January 2019.