Aponogeton angustifolius

Scientific Name
Aponogeton angustifolius Aiton
Higher Classification
Aponogeton crinifolium Lehm. ex Schltdl.
National Status
Status and Criteria
Vulnerable A2c; B1ab(iii)
Assessment Date
E. Sieben, J.A. Day & D. Raimondo
EOO 1 816-4 295 km², occurring as isolated subpopulations on the edges of lakes, vleis and in slow-flowing rivers and seasonal streams. Habitat is being continually degraded as a result of changes in flow regimes associated with urban expansion and agriculture. At least 30% of its habitat has been lost in he past 40 years, which is less than three generations (generation length 15 years).
South African endemic
Provincial distribution
Western Cape
Gouda to Worcester and the Cape Flats.
Habitat and Ecology
Major system
Major habitats
Swartland Alluvium Fynbos, Breede Alluvium Fynbos, Cape Lowland Freshwater Wetlands, Swartland Shale Renosterveld, Peninsula Shale Renosterveld, Swartland Granite Renosterveld, Boland Granite Fynbos, Cape Flats Sand Fynbos, Atlantis Sand Fynbos, Cape Flats Dune Strandveld, Lourensford Alluvium Fynbos
Sandy lake shores that dry out in summer, shallow pools or slowly flowing rivers, in water up to 1m deep.
Disruption of natural water flow dynamics of wetlands and streams due to agricultural and urban expansion results in drying up of seasonally waterlogged areas and has resulted in an estimated loss of 30% of this species habitat in the past 40 years. The species seems to persist in spite of invasion of its habitat by alien grasses.
Population trend
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Aponogeton angustifolius AitonVU A2c; B1ab(iii)Raimondo et al. (2009)

Cook, C.D.K. 2004. Aquatic and wetland plants of southern Africa. Backhuys Publishers, Leiden, The Netherlands.

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.

Manning, J.C. and Goldblatt, P. 2012. Plants of the Greater Cape Floristic Region 1: The Core Cape Flora. Strelitzia 29. South African National Biodiversity 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.

Van Bruggen, H.W.E. 1985. Monograph of the genus Aponogeton (Aponogetonaceae). Bibliotheca Botanica 137:1-76.

Sieben, E., Day, J.A. & Raimondo, D. 2010. Aponogeton angustifolius Aiton. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2019/06/16

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Distribution map

© G. Laidler

© N.A. Helme

© I. Ebrahim

© I. Ebrahim

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