Biology:Isopogon buxifolius
| Isopogon buxifolius | |
|---|---|
| |
| Subspecies obovatus in the ANBG | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Proteales |
| Family: | Proteaceae |
| Genus: | Isopogon |
| Species: | I. buxifolius
|
| Binomial name | |
| Isopogon buxifolius R.Br.[1]
| |
| |
| Occurrence data from Australasian Virtual Herbarium | |
| Synonyms[1] | |
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Isopogon buxifolius is a species of plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is an upright shrub with egg-shaped to elliptic or oblong leaves and clustered spikes of pink flowers.
Description
Isopogon buxifolius is an upright shrub that typically grows to a height of 0.3–1.7 m (1 ft 0 in–5 ft 7 in) and has mostly hairy reddish to brownish branchlets. The leaves are egg-shaped, elliptic, oblong, or egg-shaped with the narrower end towards the base and 8–35 mm (0.31–1.38 in) long with a small point on the tip. The flowers are arranged in more or less sessile spikes up to 20 mm (0.79 in) long and surrounded by leaves. The few involucral bracts are lance-shaped, the flowers 10–15 mm (0.39–0.59 in) long, pink and more or less glabrous. Flowering occurs from June to December and the fruit is an oval, hairy nut, fused with others in a cup-shaped head about 10 mm (0.39 in) long.[2][3]
Taxonomy
Isopogon buxifolius was first formally described in 1810 by Robert Brown in the Transactions of the Linnean Society of London.[4][5]
In 1870, George Bentham described four varieties of I. buxifolius in Flora Australiensis[6] and two of his names are accepted by the Australian Plant Census:
- Isopogon buxifolius R.Br. var. buxifolius[7] that has mostly egg-shaped 10–15 mm (0.39–0.59 in) long, flowering mostly from July to December.[8][9]
- Isopogon buxifolius var. obovatus (R.Br.) Benth.[10] (originally described in 1830 by Robert Brown as Isopogon spathulatus var. obovatus)[11][12] that has oblong or egg-shaped leaves with the narrower end towards the base, 15–35 mm (0.59–1.38 in) long and 7–14 mm (0.28–0.55 in) wide, flowering mostly from June to October.[13][14]
Bentham's I. buxifolius var. linearis and var. spathulatus are now regarded as a synonyms of I. spathulatus.[15]
Distribution and habitat
Variety buxifolius grows in swampy areas between Collie, Denmark and Albany[8][9] and var. obovatus has been recorded in sandy loam over laterite in a small area between the Stirling Range, Cape Riche and Bremer Bay.[13][14]
Conservation status
Variety buxifolius is classified as "Priority Two" by the Government of Western Australia Department of Parks and Wildlife, meaning that it is poorly known and from only one or a few locations[9] and var. obovatus as "Priority Three", meaning that it is poorly known and known from only a few locations but is not under imminent threat.[14][16]
References
- ↑ 1.0 1.1 "Isopogon buxifolius". Australian Plant Census. https://biodiversity.org.au/nsl/services/apc-format/display/83804.
- ↑ Foreman, David B.. "Isopogon buxifolius". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. https://profiles.ala.org.au/opus/foa/profile/Isopogon%20buxifolius.
- ↑ "Isopogon buxifolius". FloraBase. Western Australian Government Department of Parks and Wildlife. https://florabase.dpaw.wa.gov.au/browse/profile/2225.
- ↑ "Isopogon buxifolius". APNI. https://id.biodiversity.org.au/instance/apni/501564.
- ↑ Brown, Robert (1810). "On the Proteaceae of Jussieu.". Transactions of the Linnean Society of London 10 (1): 73. https://www.biodiversitylibrary.org/item/13720#page/81/mode/1up. Retrieved 21 November 2020.
- ↑ Bentham, George; von Mueller, Ferdinand (1870). Flora Australiensis. 5. London: Lovell Reeve & Co.. p. 341. https://www.biodiversitylibrary.org/item/42576#page/349/mode/1up. Retrieved 21 November 2020.
- ↑ "Isopogon buxifolius var. buxifolius". Australian Plant Census. https://biodiversity.org.au/nsl/services/apc-format/display/83836.
- ↑ 8.0 8.1 Foreman, David B.. "Isopogon buxifolius var. obovatus". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. https://profiles.ala.org.au/opus/foa/profile/Isopogon%20buxifolius%20var.%20buxifolius.
- ↑ 9.0 9.1 9.2 "Isopogon buxifolius var. buxifolius". FloraBase. Western Australian Government Department of Parks and Wildlife. https://florabase.dpaw.wa.gov.au/browse/profile/12908.
- ↑ "Isopogon buxifolius var. obovatus". Australian Plant Census. https://biodiversity.org.au/nsl/services/apc-format/display/83878.
- ↑ "Isopogon spathulatus var. obovatus". APNI. https://id.biodiversity.org.au/instance/apni/528896.
- ↑ Brown, Robert (1830). Proteaceas Novas. Supplementum primum prodromi florae Novae Hollandiae. London: Typis R. Taylor,1830. pp. 8–9. https://www.biodiversitylibrary.org/page/23925940#page/522/mode/1up. Retrieved 21 November 2020.
- ↑ 13.0 13.1 Foreman, David B.. "Isopogon buxifolius var. obovatus". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. https://profiles.ala.org.au/opus/foa/profile/Isopogon%20buxifolius%20var.%20obovatus.
- ↑ 14.0 14.1 14.2 "Isopogon buxifolius var. obovatus". FloraBase. Western Australian Government Department of Parks and Wildlife. https://florabase.dpaw.wa.gov.au/browse/profile/16719.
- ↑ "Isopogon spathulatus". Australian Plant Census. https://biodiversity.org.au/nsl/services/apc-format/display/101292.
- ↑ "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.
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