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Scientific Name | Geissorhiza imbricata (D.Delaroche) Ker Gawl. subsp. imbricata |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Geissorhiza sulphurea Schltr. (in part), Geissorhiza sulphurea Schltr. var. arenicola R.C.Foster, Geissorhiza wrightii Baker |
National Status |
Status and Criteria | Near Threatened B1b(ii,iii,iv,v)+2b(ii,iii,iv,v) |
Assessment Date | 2021/10/15 |
Assessor(s) | T. Patel |
Justification | This taxon has an extent of occurrence (EOO) of 18 451 km², and an area of occupancy (AOO) of 192 km². It is known from 47 locations. It has lost a majority of its habitat to crop cultivation and urban development. Loss of habitat is ongoing throughout its range. It is therefore listed as Near Threatened, almost meeting criteria B to be listed as Vulnerable. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | It is fairly common in southern Western Cape, extending from the Cape Peninsula eastward to Caledon, Bredasdorp, and north to the Tulbagh Valley and Worcester. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Fynbos |
Description | It occurs on wet, sandy flats, marshes and streambanks. |
Threats |
| This subspecies has lost 57% of its habitat (calculated using landcover data in GIS). More than half of known locations have been lost to urban development and crop cultivation. There is ongoing loss of habitat to crop cultivation and urban development. It is also experiencing habitat degradation due to invasive alien plants. |
Population |
It is known from 47 locations, however, the population has a decreasing trend.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Geissorhiza imbricata (D.Delaroche) Ker Gawl. subsp. imbricata | Least Concern | 2012.1 | | Geissorhiza imbricata (D.Delaroche) Ker Gawl. subsp. imbricata | 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. 2020. Iridaceae of southern Africa. Strelitzia 42. 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.
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Citation |
| Patel, T. 2021. Geissorhiza imbricata (D.Delaroche) Ker Gawl. subsp. imbricata. National Assessment: Red List of South African Plants version . Accessed on 2024/09/14 |
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