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Scientific Name | Geissorhiza exscapa (Thunb.) Goldblatt |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Engysiphon exscapus (Thunb.) G.J.Lewis, Engysiphon longitubus G.J.Lewis |
Common Names | Langpyp-Sysie (a) |
National Status |
Status and Criteria | Near Threatened B2b(ii,iii) |
Assessment Date | 2023/11/26 |
Assessor(s) | H. Mtshali |
Justification | This is a widespread and common species, with an extent of occurrence (EOO) of 36 786 km² and an area of occupancy (AOO) of 200 km². It is known from at least 30 subpopulations and is threatened by mining and agricultural expansion. It nearly meets the thresholds for Vulnerable under criteria B and is therefore listed as Near Threatened. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Northern Cape, Western Cape |
Range | It extends along the Atlantic Coast of South Africa from near Hondeklipbaai in the Northern Cape south to Blouberg near Cape Town in Western Cape, and inland to the Bokkeveld and Pakhuis Mountains. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Fynbos |
Description | It usually occurs in deep alluvial coastal sands in sandveld vegetation, or inland in fynbos. |
Threats |
| About 50% of this species' deep alluvial sandy habitat has been lost to agriculture (Rooibos tea and potato cultivation) and mining. However, it remains widespread and common within its range. |
Population |
There are no quantitative population data available for this species, but about 30 subpopulations are known to exist. The population trend is inferred to be declining due to ongoing habitat loss and degradation.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Geissorhiza exscapa (Thunb.) Goldblatt | 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.
Goldblatt, P., Manning, J.C. and Nänni, I. 2009. New species of Geissorhiza (Iridaceae:Crocoideae) from the southern African winter rainfall zone, range extensions, taxonomic changes, and notes on pollen morphology. Bothalia 39(2):123-152.
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 |
| Mtshali, H. 2023. Geissorhiza exscapa (Thunb.) Goldblatt. National Assessment: Red List of South African Plants version . Accessed on 2024/09/08 |
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