Biology:Olearia microdisca
| Olearia microdisca | |
|---|---|
| |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Olearia |
| Species: | O. microdisca
|
| Binomial name | |
| Olearia microdisca J.M.Black[1]
| |
Olearia microdisca, commonly known as small-flowered daisy-bush,[2] is a species of flowering plant in the family Asteraceae and is endemic to Kangaroo Island, South Australia. It is a compact shrub with small, crowded, oblong leaves and white and yellow, daisy-like inflorescences.
Description
Olearia microdisca is a compact shrub that typically grows to a height of up to 1.5 m (4 ft 11 in) and has many softly-hairy branches. Its leaves are crowded, sometime overlapping each other, oblong 1.5–2.5 mm (0.059–0.098 in) long, about 1 mm (0.039 in) wide and sessile. The upper surface of the leaves is glabrous, the lower surface is woolly-hairy and the edges are rolled under. The heads or daisy-like "flowers" are arranged singly on the ends of erect branches and sessile. Each head has two to five white ray florets, the ligules about 3 mm (0.12 in) long, surrounding two or three yellow disc florets. Flowering occurs in most months and the fruit is a softly-hairy achene, the pappus about 2 mm (0.079 in) long with 25 to 35 bristles.[3]
Taxonomy
Olearia microdisca was first formally described in 1928 by John McConnell Black in Transactions and Proceedings of the Royal Society of South Australia.[4][5]
Distribution and habitat
Small-flowered daisy-bush grows in heath and mallee and is restricted to Kangaroo Island in South Australia.[2][3]
Conservation status
Olearia microdisca is listed as "endangered" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999. A recovery plan for nationally threatened plant species on Kangaroo Island, including O. microdisca, has been prepared.[6][7]
References
- ↑ "Olearia microdisca". https://biodiversity.org.au/nsl/services/apc-format/display/105016. Retrieved 25 May 2022.
- ↑ 2.0 2.1 Holliday, Ivan. "The genus Olearia". Australian Native Plants Society (Australia). http://anpsa.org.au/APOL35/sep04-4.html.
- ↑ 3.0 3.1 "Olearia microdisca". State Herbarium of South Australia. http://www.flora.sa.gov.au/cgi-bin/speciesfacts_display.cgi?form=speciesfacts&name=Olearia_microdisca.
- ↑ "Olearia microdisca". APNI. https://id.biodiversity.org.au/instance/apni/534291.
- ↑ Black, John M. (1928). "Additions to the Flora of South Australia. No. 26.". Transactions and Proceedings of the Royal Society of South Australia 52: 229. https://www.biodiversitylibrary.org/item/129838#page/235/mode/1up. Retrieved 25 May 2022.
- ↑ "SPRAT profile Olearia microdisca". Australian Government Department of Agriculture, Water and the Environment. https://www.environment.gov.au/cgi-bin/sprat/public/publicspecies.pl?taxon_id=21465.
- ↑ "Recovery plan for nationally threatened plant species on Kangaroo Island South Australia". Australian Government Department of Agriculture, Water and the Environment. https://www.awe.gov.au/sites/default/files/documents/kangaroo-island-threatened-plants.pdf.
Wikidata ☰ Q15587319 entry
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