Exotic invasive water plants
Produced by the City of Cape Town in collaberation with the Sand River Catchment Forum.
2016. updated 03/03/2016.
The water is black in colour and it had a strong mineral oil smell on 14/02/2015.
The grass in the water is just below the surface. Nothing was visible below the grass.
A distinct "oily"substance can be seen on the surface at the confluence of the Westlake and Keysers Rivers on 14/02/2015.
The confluence has nearly all the recorded water invasive species.
The Zandvlei Catchment Team.
This team was appointed on a contract in mid January 2012.
It was first found in this part of catchment in March 2009 (species identified by Candice Haskins March 2009, see above).
Sand River and Langevlei channel.
The Sand River between Wildwood Island and
Lakeside suburb in the western background.
Marina da Gama in the background looking from
Note the yellow flower in the centre of the photo.
Ludwigia stolonifera Willow Herb was also confirmed in the higher reaches of the Westlake River in March 2009 as well.
Rorippa nasturtium - aquaticum Water
cress was found washed down from Princess and Little Princess Vleis during flooding
in Feb / March 2009.
Cassy Sheasby (Manager - Zandvlei Nature Reserve).
Purple Loosestrife Lythrum salicaria.
This flyer was produced by The Friends Of Liesbeek, Dave and Liz Wheeler. This is a very invassive plant difficult and very expensive to eradicate. It is in the Liesbeek River. They are working at eradicating it.
If you see it in any other waterway please report it to the nearest City of Cape Town Enviromental Management office.
This is a new invassive plant in the Liesbeek River. Please be on the watch out for this plant in the Sand River Catchment and please report it, if seen, to Cassy Sheasby the Manager of Zandvlei Nature Reserve.
Closeup of the flowers. Plant with flowers in bloom.
Water Hyacinth Eichhornia crassipes
"The Kingfisher" water weed harvester clearing hyacinth at the Rutter Road Pond and confluence of the Westlake and Keysers Rivers, in April 2008.
Robin Burnett photographed the Water Hyacinth (Eichhornia crassipes) in the Westlake River - December 2006. It is smothering the Waterblommetjie (Aponogeton distachyos) plants in the forground, small white flowers. Enlarged flower to the right.
The confluence of the Westlake and Keysers Rivers at the railway bridge looking west towards Steenberg and Constantiaberg, before the water enters the western side of Zandvlei. It is at the height of summer and one can almost watch the weed grow. Taken in 2004.
The same place only with the Water hyacinth (Eichhornia crassipes) cleared. Not only does the weed extract oxygen and nutrients from the water, it creates a physical barrier for recreational users and is a huge potential cause for flooding. Taken in 2004.