Hakea constablei
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Hakea
Species:
H. constablei
Binomial name
Hakea constablei
Occurrence data from Australasian Virtual Herbarium
Fruit

Hakea constablei is a shrub in the Proteacea family native to eastern Australia. A bushy shrub or small tree with a profusion of white or cream flowers in spring.

Description

Hakea constablei is a compact rounded shrub to small tree growing to 1.8 to 6 metres (5.9 to 19.7 ft) high. The needle-shaped bright green pointed leaves are 3 to 11 centimetres (1 to 4 in) long and 1 to 1.6 millimetres (0.0 to 0.1 in) wide. New growth is hairy, branches are arching hanging loosely and despite the pointed leaves not particularly prickly. The bright green leaves are needle-shaped and about 10 cm (3.9 in) long. It produces cream-white flowers from September to November on the previous seasons stems. Each inflorescence is composed of 6 to 12 flowers with a cream white perianth that is 3–4.2 mm (0.12–0.17 in) long. The style about 10 mm (0.39 in) long with a cone shaped stigma. The large rounded fruit are 4.3 to 5.5 centimetres (1.69 to 2.17 in) long and 3 to 3.5 cm (1.18 to 1.38 in) wide. The dark grey surface is covered with warty protuberances, ending with horns 0.5 to 1.8 mm (0.020 to 0.071 in) long. The dark brown seed are 2.7 to 3.7 cm (1.06 to 1.46 in) long with a wing down one side.[2][3][4][5]

Taxonomy and naming

Hakea constablei was initially found in 1899 but the specimen was inadvertently stored with another Hakea. It was overlooked until 1950 when E.F. Constable collected the species near the Blue Mountains and brought it to the attention of botanists at the Sydney Herbarium. The species was first formally described by the botanist Lawrence Alexander Sidney Johnson in 1962 and published in Contributions from the New South Wales National Herbarium.[3][6] The specific epithet honours Ernie Constable a former seed and plant collector for the Royal Botanic Gardens in Sydney. He collected mostly in New South Wales, including the type specimen for the species.[2][7]

Distribution and habitat

Hakea constablei is endemic to an area in the Blue Mountains and Wollondilly catchment in New South Wales where it is found among elevated sandstone outcrops as part of sclerophyll forest communities.[2]

Conservation status

Hakea constablei is considered rare, ROTAP conservation code 2RCa, Briggs, Leigh and Hartley 1996.[8]

References

  1. ^ "Hakea constablei". APNI. Retrieved 24 January 2019.
  2. ^ a b c "Hakea constablei". Flora of South Australia. South Australian Government. Retrieved 24 January 2019.
  3. ^ a b Fairley, Alan (2004). "Seldom Seen-Rare Plants of the Greater Sydney". Sydney: Louise Egerton. ISBN 1-876334-99-1.
  4. ^ Fairley, Alan; Moore, Philip (2010). "Native Plants of the Sydney Region". Jacana Books-Louise Egerton. ISBN 978-1-74175-571-8.
  5. ^ Wrigley, John W. (1989). "Banksias Waratahs & Grevilleas & all other plants of the Australian Proteaceae family". Collins Australia. ISBN 0-7322-0020-2.
  6. ^ "Hakea constablei L.A.S.Johnson". Atlas of Living Australia. Global Biodiversity Information Facility. Retrieved 18 October 2018.
  7. ^ Holliday, Ivan. "Hakeas a Field and Garden Guide. Reed New Holland. ISBN 1-877069-14-0.
  8. ^ "Hakea constablei". Australian Plant Society. Retrieved 21 February 2019.
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