Pleurophyllum hookeri explained
Pleurophyllum hookeri, also known as the silver-leaf daisy or sage-green rosette herb, is a herbaceous plant in the family Asteraceae, a megaherb native to the subantarctic Auckland and Campbell Islands of New Zealand and Australia’s Macquarie Island. It grows up to 900 mm in height and has crimson button flowers and long, silky, silver leaves, with a large carrot-like tuber and long roots. It also has the unusual feature of a vertically contractile stem, most of which is underground, which serves to keep the leaf rosette close to the ground surface and the plant anchored securely against the very strong winds typical of subantarctic islands.[1] Prior to the successful eradication of introduced mammals on Macquarie Island in 2011, it had been threatened there by black rats[2] and European rabbits.
References
Sources
- Briggs, C.L. . Selkirk, P.M. . Bergstrom, D.M. . amp . 2006. Facing the furious fifties: The contractile stem of the subantarctic megaherb Pleurophyllum hookeri . New Zealand Journal of Botany . 44 . 2 . 187–197 . 10.1080/0028825X.2006.9513017 . 84945311 .
- Notes on new Species of Plants. . Buchanan J. . 1884 . Transactions and Proceedings of the New Zealand Institute . 16 . 395 . 28 November 2021 . Papers Past.
- Shaw, Justine D. . Hovenden, Mark J. . Bergstrom, Dana M. . amp . 2008-06-28 . The impact of introduced ship rats (Rattus rattus) on seedling recruitment and distribution of a subantarctic megaherb (Pleurophyllum hookeri) . Austral Ecology . 30 . 1 . 118–125 . 10.1111/j.1442-9993.2005.tb00371.x .
- Web site: Macqauarie Island - a report on a short visit . Croft, J.R.; & Richardson, M.M. . 2010-08-03 . Australian National Botanic Gardens . dead . https://web.archive.org/web/20100928234816/http://www.anbg.gov.au/projects/macquarie/macq-report.html . 2010-09-28 .
- Web site: Macqauarie Island Flora – Plateau Uplands . 2010-08-03 . Australian Antarctic Division . 2008-07-31.
External links
Notes and References
- Briggs et al. (2006).
- Shaw et al. (2008).
