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Scientific Name | Geissorhiza altimontana Goldblatt & J.C.Manning |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
National Status |
Status and Criteria | Critically Rare |
Assessment Date | 2021/08/16 |
Assessor(s) | L. von Staden |
Justification | This species is rare and localized, but probably overlooked. It is a summer-flowering geophyte, and is currently known from a single mountain peak where it is not threatened. It has an extent of occurrence (EOO) and area of occupancy (AOO) of 4 km², and it is therefore listed under the IUCN 3.1. criteria as Least Concern but is nationally recognised as Critically Rare. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | A species endemic to South Africa, known from just one subpopulation on the Leeuriviersberg (Grootberg) west of Swellendam, in the Western Cape province. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | South Langeberg Sandstone Fynbos |
Description | It occurs high in the Langeberg at around 1 550 m elevation in unburnt veld, on damp, mossy ledges on steep, upper south-facing slopes. |
Threats |
| This species has no threats, and is therefore not in danger of extinction. |
Population |
It is a rare and localized species, currently known from less than 50 plants (N.A. Helme, pers. comm. 2011). There may however be other subpopulations in inaccessible sites elsewhere on the Leeurivierberg. 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 altimontana 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. 2021. Geissorhiza altimontana Goldblatt & J.C.Manning. National Assessment: Red List of South African Plants version . Accessed on 2024/09/08 |
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