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Scientific Name | Geissorhiza sufflava Goldblatt & J.C.Manning |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
National Status |
Status and Criteria | Critically Endangered B1ab(iii,v); C2a(i) |
Assessment Date | 2023/06/20 |
Assessor(s) | I. Ebrahim, D. Raimondo, L. von Staden & T. Patel |
Justification | This species has an extent of occurrence (EOO) of 37 km² and an area of occupancy (AOO) of 12 km². It is known from three severely fragmented subpopulations which continue to decline due to ongoing habitat degradation due to lack of fire and alien plant invasion. Subpopulations are small with fewer than 50 mature individuals in each and the overall population is suspected to be less than 250 mature individuals. It is therefore listed as Critically Endangered under criterion B and C. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | It is endemic to Western Cape province of South Africa, and is restricted to the lower eastern slopes and foot of the Piketberg. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Swartland Shale Renosterveld, Piketberg Sandstone Fynbos |
Description | It occurs in well-drained, stony clay lower slopes, in renosterveld or renosterveld-fynbos transitions, flowering best after fire. |
Threats |
| This species has lost 70% of its habitat (calculated using landcover data in GIS). The flats below the eastern slopes of Piketberg are extensively cultivated, but there has not been much agricultural expansion on the slopes. Recently however, vineyards are being planted up the slopes. The lower slopes are not being burnt and the vegetation is generally very old and senescent, and alien plants are starting to invade. |
Population |
The population has a decreasing trend and is known from only three subpopulations. There are population size estimates for two and both have fewer than 50 plants. The overall population is projected to be fewer than 250 individuals.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Geissorhiza sufflava Goldblatt & J.C.Manning | EN B1ab(iii)+2ab(iii) | 2011.1 | |
Bibliography |
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.
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Citation |
| Ebrahim, I., Raimondo, D., von Staden, L. & Patel, T. 2023. Geissorhiza sufflava Goldblatt & J.C.Manning. National Assessment: Red List of South African Plants version . Accessed on 2024/12/07 |
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