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Scientific Name | Geissorhiza lapidosa Goldblatt & J.C.Manning |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
National Status |
Status and Criteria | Critically Rare |
Assessment Date | 2023/06/01 |
Assessor(s) | L. von Staden & T. Patel |
Justification | This is an extremely localized, habitat specialist with an extent of occurrence (EOO) and area of occupancy (AOO) of 4 km². It is known from a single mountain peak where it is not threatened. It is therefore listed globally as Least Concern and nationally, as Critically Rare. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | It is endemic to the Western Cape province, South Africa, restricted to Goudini Sneeukop in the Du Toit's Kloof Mountains. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Western Coastal Shale Band Vegetation |
Description | It occurs along a narrow band of sandstone pavement at the edge of cliffs in moist seeps draining from a shale sponge overlying the sandstone. It has a very restricted habitat less than 4 m wide, unusual for the genus. The two known colonies are about 800 m apart in an area regularly covered by snow in winter and spring. |
Threats |
| This species has no threats. |
Population |
The population is very localized, with at least 200 plants in two small colonies. The habitat is extremely specialized, with plants restricted to a narrow band less than 4 m wide. The population has a stable trend.
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Population trend | Stable |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Geissorhiza lapidosa Goldblatt & J.C.Manning | Critically Rare | 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 |
| von Staden, L. & Patel, T. 2023. Geissorhiza lapidosa Goldblatt & J.C.Manning. National Assessment: Red List of South African Plants version . Accessed on 2024/09/08 |
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