|
Scientific Name | Geissorhiza inflexa (D.Delaroche) Ker Gawl. |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Geissorhiza quinquangularis Eckl. ex Klatt |
Common Names | Witsyblom (a) |
National Status |
Status and Criteria | Least Concern |
Assessment Date | 2021/10/18 |
Assessor(s) | L. von Staden & T. Patel |
Justification | This is a widespread and relatively common species, with an extent of occurrence (EOO) of 26 008 km², and an area of occupancy (AOO) of 292 km². It is known from at least 40 subpopulations, and is still common in spite of extensive habitat loss. Although the population continues to decline, it is not yet in danger of extinction. It is therefore listed as Least Concern. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | An endemic to the Western Cape province, South Africa, occurring from Piketberg in the north to the Cape Peninsula and east to Bredasdorp and Swellendam. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Fynbos |
Description | It occurs on clay flats and slopes in renosterveld. |
Threats |
| This species has lost more than 80% of its habitat to urban and agricultural expansion. Most subpopulations occur on small remnants, which continue to be lost and degraded due to development, inappropriate fire management, overgrazing and spreading, unmanaged alien invasive plants. |
Population |
A population reduction of >50% could be inferred from extensive habitat loss, however, this decline occurred over a period exceeding three generations. Despite this substantial reduction, the species remains relatively common. Recent field observations confirm its presence in at least 30 locations, where subpopulations are notable, comprising several hundred to several thousand mature individuals. The population however continues to decline due to ongoing habitat loss and degradation.
|
Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Geissorhiza inflexa (D.Delaroche) Ker Gawl. | Least Concern | Raimondo et al. (2009) | |
Bibliography |
Goldblatt, P. 1985. Systematics of the southern African genus Geissorhiza (Iridaceae-Ixioideae). Annals of the Missouri Botanical Garden 72(2):277-447.
Goldblatt, P. and Manning, J.C. 2000. Cape Plants: A conspectus of the Cape Flora of South Africa. Strelitzia 9. National Botanical Institute, Cape Town.
Goldblatt, P. and Manning, J.C. 2020. Iridaceae of southern Africa. Strelitzia 42. South African National Biodiversity Institute, Pretoria.
Manning, J.C. and Goldblatt, P. 2012. Plants of the Greater Cape Floristic Region 1: The Core Cape Flora. Strelitzia 29. South African National Biodiversity Institute, Pretoria.
Raimondo, D., von Staden, L., Foden, W., Victor, J.E., Helme, N.A., Turner, R.C., Kamundi, D.A. and Manyama, P.A. 2009. Red List of South African Plants. Strelitzia 25. South African National Biodiversity Institute, Pretoria.
|
Citation |
| von Staden, L. & Patel, T. 2021. Geissorhiza inflexa (D.Delaroche) Ker Gawl. National Assessment: Red List of South African Plants version . Accessed on 2024/09/08 |
Comment on this assessment
