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Senna (weeds) Mill.
This genus of leguminous plants contains around 300 species, found mainly in tropical and subtropical regions of the Americas, Africa and Australia. Senna includes some important weeds like sicklepod. Other species are grown as crops or ornamentals.
The genus includes herbs, shrubs and trees. They have compound leaves with opposite paired leaflets, and small yellow flowers with 5 free petals of similar size. The 10 stamens are characteristic with 2 having long bent filaments, sometimes longer than the petals, 5 are medium sized and 3 are short. The anthers are elongated.
Type species: Senna alexandrina
For details see the respective page in Wikipedia.
Currently, the following species have been entered into the system: