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Scientific Name | Senecio cadiscus B.Nord. & Pelser |
Higher Classification | Dicotyledons |
Family | ASTERACEAE |
Synonyms | Cadiscus aquaticus E.Mey. ex DC. |
Common Names | Vernal Pool Daisy (e), Water Daisy (e) |
National Status |
Status and Criteria | Critically Endangered B2ab(i,ii,iii,iv,v) |
Assessment Date | 2007/07/18 |
Assessor(s) | N.A. Helme & D. Raimondo |
Justification | AOO<2 km², this species occurs as small, fragmented subpopulations. It is declining as a result of livestock overgrazing and trampling, infilling of wetlands, alien plant invasion and eutrophication. It has declined by over 70% in the past 100 years. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Eendekuil to Tygerberg. |
Habitat and Ecology |
Major system | Freshwater |
Major habitats | Swartland Shale Renosterveld, Swartland Granite Renosterveld, Swartland Silcrete Renosterveld, Cape Winelands Shale Fynbos |
Description | Vernal pools on shale. Juveniles submerged, adults floating, emergent or temporarily terrestrial. |
Threats |
| Habitat loss, Pollution (affecting habitat and/or species), Invasive Alien Species (direct effects), Habitat degradation |
Population |
Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Cadiscus aquaticus E.Mey. ex DC. | CR B2ab(i,ii,iii,iv,v) | Raimondo et al. (2009) | | Cadiscus aquaticus E.Mey. ex DC. | Endangered | Hilton-Taylor (1996) | |
Bibliography |
Cook, C.D.K. 2004. Aquatic and wetland plants of southern Africa. Backhuys Publishers, Leiden, The Netherlands.
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.
Sieben, E.J.J. 2009. The status and distribution of vascular plants (Magnoliophyta, Lycophyta, Pteridophyta). In: W.R.T. Darwall, K.G. Smith, D. Tweddle and P. Skelton (eds.), The status and distribution of freshwater biodiversity in southern Africa (pp. 83-98), IUCN and SAIAB, Gland, Switzerland and Grahamstown, South Africa.
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Citation |
| Helme, N.A. & Raimondo, D. 2007. Senecio cadiscus B.Nord. & Pelser. National Assessment: Red List of South African Plants version . Accessed on 2025/06/29 |
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