Hakea cygna
| Hakea cygna | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| Order: | Proteales |
| Family: | Proteaceae |
| Subfamily: | Grevilleoideae |
| Genus: | Hakea |
| Species: | H. cygna |
| Binomial name | |
| Hakea cygna Lamont [1][2] | |
Hakea cygna is a Western Australian shrub.[1]
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; tepal - 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 2 3 "Hakea cygna". FloraBase. Department of Environment and Conservation, Government of Western Australia.
- 1 2 FloraBase cite: J.Linn.Soc.,Bot. 94:439-440,Fig.4c (1987)
- ↑ 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.
- ↑ Florabase Conservation codes P1: Priority One - Poorly Known (Threatened and unsurveyed)