Biology:Azorella macquariensis
| Azorella macquariensis | |
|---|---|
| |
| Azorella macquariensis cushion plant on Macquarie Island. | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Apiales |
| Family: | Apiaceae |
| Genus: | Azorella |
| Species: | A. macquariensis
|
| Binomial name | |
| Azorella macquariensis Orchard, 1989[2]
| |
Azorella macquariensis, also known as Macquarie azorella or Macquarie cushions, is a species of cushion plant endemic to Australia’s subantarctic Macquarie Island. It was referred to the more widely distributed Azorella selago until 1989, when it was described as a separate species.[3]
Description
Azorella macquariensis is a perennial cushion-forming herb. Individuals form cushions and mats that may vary in size from a few centimetres to several metres in diameter and up to 60 cm in height. It is a keystone species dominating Macquarie's feldmark habitat, in which it is the only vascular plant, forming a major structural component of the vegetation. The feldmark community covers about half the island in the most wind-exposed areas of the plateau some 200–400 m above sea level. The plant flowers from December to February and fruits from January to April. It turns brown and ceases to grow during winter (from June to August).[3]
Conservation status
Azorella macquariensis has suffered a catastrophic decline due to dieback from unknown causes, first noticed in December 2008, and is considered to be endangered.[3] As of August 2010[update] it is listed as critically endangered under the EPBC Act.[1]
References
Notes
- ↑ 1.0 1.1 Azorella macquariensis, Species Profile and Threats Database, Department of the Environment and Heritage, Australia.
- ↑ Orchard (1989)
- ↑ 3.0 3.1 3.2 Tasmanian Threatened Species Notesheet (2009)
Sources
- Orchard, A.E. (1989). "Azorella Lamarek (Hydrocotylaceae) on Heard and Macquarie Islands.". Muelleria 7: 16–18.
- "Azorella macquariensis – Macquarie cushions". Tasmanian Threatened Species Notesheet. Department of Primary Industries and Water, Tasmania. 2009. http://www.dpiw.tas.gov.au/inter.nsf/Attachments/LJEM-7V3788/$FILE/Azorella%20macquariensis%20notesheet.pdf.
Wikidata ☰ Q4832844 entry
 |  |
