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Scientific Name | Ixia calendulacea Goldblatt & J.C.Manning |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Ixia maculata L. var. intermedia G.J.Lewis |
National Status |
Status and Criteria | Least Concern |
Assessment Date | 2015/06/30 |
Assessor(s) | D. Raimondo, J.C. Manning & L. von Staden |
Justification | This relatively widespread (EOO 23 597 km²) species is threatened across its range by habitat loss to crop cultivation (mainly for potatoes and rooibos tea). It is however still fairly common and not yet in danger of extinction. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Northern Cape, Western Cape |
Range | West Coast coastal plain between the Groenrivier Mouth and Langebaan, and inland as far as Porterville and the Olifants River Valley. One disjunct location is recorded from the Cape Flats. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Fynbos |
Description | Deep, well-drained sandy soils. |
Threats |
| Severely threatened across most of its range by continuing habitat loss to rooibos tea and potato cultivation. Urban expansion and coastal development are threatening coastal populations around Vredenburg, Langebaan and Saldanha. |
Population |
Subpopulations are often described on herbarium labels as small and localized. This species, although still relatively common, is declining rapidly. The data is however not available at present to estimate the rate of population decline.
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Population trend | Decreasing |
Notes |
| It is not certain whether the Cape Flats population is naturalized or of wild origin. Plants occur in a fragment of natural vegetation and are unlikely to have been planted there, but may have escaped from surrounding urban gardens. Because of the large disjunction with the rest of the range of this species and the uncertainty as to whether or not it is a natural population, it is excluded from the estimate of Extent of Occurrence. |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Ixia calendulacea Goldblatt & J.C.Manning | Least Concern | 2015.1 | | Ixia maculata L. var. intermedia G.J.Lewis | NT B1ab(ii,iii,iv,v) | Raimondo et al. (2009) | | Ixia maculata L. var. intermedia G.J.Lewis | Insufficiently Known | Hilton-Taylor (1996) | | Ixia maculata L. var. intermedia G.J.Lewis | Uncertain | Hall et al. (1980) | |
Bibliography |
De Vos, M.P. 1999. Ixia. In: O.A. Leistner (ed). Flora of Southern Africa 7 Iridaceae Part 2: Ixioideae, Fascicle 1: Ixieae:3-87. National Botanical Institute, Pretoria.
Goldblatt, P. and Manning, J.C. 2010. Iridaceae: Reappraisal of Ixia maculata with I. calendulacea sp. nov., and an earlier name for I. lutea. Bothalia 40(1):59-64.
Goldblatt, P. and Manning, J.C. 2016. Systematics of the southern African genus Ixia L. (Iridaceae): 5. Synopsis of section Ixia, including five new species. South African Journal of Botany 104:175-198.
Hall, A.V., De Winter, M., De Winter, B. and Van Oosterhout, S.A.M. 1980. Threatened plants of southern Africa. South African National Scienctific Programmes Report 45. CSIR, Pretoria.
Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.
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 |
| Raimondo, D., Manning, J.C. & von Staden, L. 2015. Ixia calendulacea Goldblatt & J.C.Manning. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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