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Ammannia (weeds) L. - (red-stems)
This genus contains around 25 species of herbaceous plants. They are found in temperate as well as tropical regions and the genus is well represented in Africa. The species inhabit mainly wetlands like marshes. Some are regarded as agricultural weeds in rice fields like Ammannia coccinea and A. auriculata.
The plants, typically grow up to a height of around 50 cm and have elongated leaves as well as small red flowers. The stems are often reddish.
Currently, the following species have been entered into the system: