Biology:Hakea oldfieldii
| Hakea oldfieldii | |
|---|---|
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Proteales |
| Family: | Proteaceae |
| Genus: | Hakea |
| Species: | H. oldfieldii
|
| Binomial name | |
| Hakea oldfieldii Benth.[1]
| |
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| Occurrence data from AVH | |
Hakea oldfieldii is a shrub of the family Proteaceae and is endemic to South West region of Western Australia. It has small white or cream-yellow flowers in profusion in spring.
Description
Hakea oldfieldii is an open, straggling shrub with upright branches and growing to a height of 2.5 metres (8.2 ft). The smooth, needle-shaped leaves are more or less 20–50 mm (0.79–1.97 in) long and 1 mm (0.039 in) wide and grow alternately. The rigid dark green leaves may be curving or straight and end in a sharp point. The branchlets are smooth and covered with a bluish green powdery film. The inflorescence consists of 8-20 white or cream-yellow flowers in a raceme in the leaf axils on a smooth stalk 2–3 mm (0.079–0.118 in) long. The flowers appear in profusion and have an unpleasant scent. The over-lapping flower bracts are 3–6 mm (0.12–0.24 in) long, the pedicel 2.5–9.5 mm (0.098–0.374 in) long. The smooth, cream-white perianth 1.5–2.5 mm (0.059–0.098 in) long and the pistil 3–4.5 mm (0.12–0.18 in) long. The fruit are egg-shaped almost rounded, 16–23 mm (0.63–0.91 in) long, 8–10 mm (0.31–0.39 in) wide with an uneven surface, occasionally warty ending with two prominent horns about 5 mm (0.20 in) long. Flowering occurs from August to October.[2][3][4]
Taxonomy and naming
Hakea oldfieldii was first formally described by George Bentham in 1870 and published the description in Flora Australiensis.[5][6] The specific epithet oldfieldii honours Augustus Frederick Oldfield who first discovered the species.[4]
Distribution and habitat
This species is found in the south-west from Bunbury and Busselton to the Stirling Range growing in well-drained rocky loam or clay over ironstone in winter-wet sites.[7]
Conservation status
Hakea oldfieldii is classified as "Priority Three" by the Government of Western Australia Department of Parks and Wildlife[2] meaning that it is poorly known and known from only a few locations but is not under imminent threat.[8]
References
- ↑ "Hakea oldfieldii". https://biodiversity.org.au/nsl/services/apc-format/display/97379.
- ↑ 2.0 2.1 "Hakea oldfieldii". FloraBase. Western Australian Government Department of Parks and Wildlife. https://florabase.dpaw.wa.gov.au/browse/profile/2190.
- ↑ Barker, Robyn M.; Haegi, Laurence A.; Barker, William R. (1999). Flora of Australia Volume 17B Proteaceae 3 Hakea to Dryandra. ABRS-Commonwealth of Australia. ISBN 0-643-06454-0.
- ↑ 4.0 4.1 Holliday, Ivan (2005). Hakeas a Field and Garden Guide. Reed New Holland. ISBN 1-877069-14-0.
- ↑ "Hakea oldfieldii". https://www.biodiversitylibrary.org/item/42576#page/538/mode/1up.
- ↑ "Hakea oldfieldii". https://biodiversity.org.au/nsl/services/rest/instance/apni/522525.
- ↑ "Hakea oldfieldii". South Australian Government. http://www.flora.sa.gov.au/efsa/lucid/Hakea/key/Australian%20Hakea%20species/Media/Html/Hakea_oldfieldii.htm.
- ↑ "Conservation codes for Western Australian Flora and Fauna". Government of Western Australia Department of Parks and Wildlife. https://www.dpaw.wa.gov.au/images/documents/plants-animals/threatened-species/Listings/Conservation%20code%20definitions.pdf. Retrieved 15 March 2021.
Wikidata ☰ Q18082054 entry
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