Hakea cygna

Hakea cygna
Hakea cygna subsp. cygna near Tathra National Park
Scientific classification
Kingdom:Plantae
Clade:Angiosperms
Clade:Eudicots
Order:Proteales
Family:Proteaceae
Genus:Hakea
Species: H. cygna
Binomial name
Hakea cygna

Hakea cygna is a Western Australian shrub.[1]

Description

The shrubby species is nonsprouting, erect, 0.4 to 2.0 m, with branchlets that become densely haired in the flowering period. Flowering will occur at a time between July and October, the inflorescence is compacted on racemes, 10 - 14 creamy or white flowers; these arrangements are upright appearing at the now silky terminal branchlets. Pedicel - 2–5 mm long; sepal - 4–6 mm; pistil 5–7 mm.

The leaves are simple, and narrow or obovate; they are thick, glabrous, 20 – 75 mm long, 1.2 – 9 mm wide; flat or nearly circular in cross section. The margin is complete and has a prominent venation; longitudinal veins may be three and are indistinct.

Fruit and seeds will appear on short stalks, and are ovate in form; the fruit is elliptic, 20–37 mm long, 12–20 mm wide, with a slender tip. Seed tending to triangular and is winged - pale brown and darkly striated.

Distribution

It is widely distributed especially to a corridor of the eastern regions of the southwest botanical province, from the Esperance Plains to the northern biogeographic regions. Stony, gravelly loams or sands, particularly laterite sands.[3] It also extends into the Eremaean province, and to the region around the Swan River - it is from here that the name was derived, cygna for Swan.

Subspecies

There are currently two subspecies:

  • (Variant) Hakea cygna Lamont subsp. cygna: Swan Fruit Hakea

widespread, the entire population excepting that below. It is of Least Concern, at least with regard to extinction.[1]

  • Hakea cygna subsp. needlei Lamont:[2]

the leaves might be narrower, needle-like; pistils, tepals slightly shorter. It is found in a small population near Lake King in the Esperance Plains region. The conservation status is that of a threatened, though poorly known species.[4]

References

  1. 1 2 3 "Hakea cygna". FloraBase. Western Australian Government Department of Parks and Wildlife.
  2. 1 2 FloraBase cite: J.Linn.Soc.,Bot. 94:439-440,Fig.4c (1987)
  3. ↑ Lamont, B.; et al. (1987). "Hakea cygna Lamont, in B. Lamont et al. , J. Linn. Soc., Bot. 94: 439 (1987)" (Data derived from Flora of Australia Volumes 16 (1995), 17A (2000) and 17B (1999)). Flora of Australia–Online. ABRS. Retrieved 29 August 2007.
  4. ↑ Florabase Conservation codes P1: Priority One - Poorly Known (Threatened and unsurveyed)
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.