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Scientific Name | Ixia trinervata (Baker) G.J.Lewis |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Tritonia trinervata Baker |
National Status |
Status and Criteria | Endangered B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) |
Assessment Date | 2014/04/08 |
Assessor(s) | P. Goldblatt, J.C. Manning, N.A. Helme, D. Raimondo & L. von Staden |
Justification | A highly localized species (EOO 425 km²), with only a few, small, subpopulations remaining on isolated fragments of natural vegetation after extensive habitat loss, predominantly to crop cultivation. Between six and 10 severely fragmented subpopulations continue to decline due to ongoing habitat loss and degradation as well as competition from alien invasive plants. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Elgin to Caledon. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Western Ruens Shale Renosterveld, Greyton Shale Fynbos, Elgin Shale Fynbos |
Description | Renosterveld on shale. |
Threats |
| Less than 15% of this species' lowland renosterveld habitat remains after extensive loss to expanding crop cultivation. All remaining subpopulations occur on small, isolated fragments where they continue to be threatened by ongoing habitat loss to cultivation, competition from alien invasive plants, overgrazing and a lack of fire. |
Population |
Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Ixia trinervata (Baker) G.J.Lewis | EN B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) | 2014.1 | | Ixia trinervata (Baker) G.J.Lewis | NT B1ab(ii,iii) | 2013.1 | | Ixia trinervata (Baker) G.J.Lewis | NT B1ab(ii,iii) | Raimondo et al. (2009) | |
Bibliography |
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. 2012. Systematics of the southern African genus Ixia (Iridaceae:Crocoideae): 4. Revision of sect. Dichone. Bothalia 42(2):87-110.
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 |
| Goldblatt, P., Manning, J.C., Helme, N.A., Raimondo, D. & von Staden, L. 2014. Ixia trinervata (Baker) G.J.Lewis. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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