Philenoptera laxiflora

Philenoptera laxiflora is a tree of the legume family, Fabaceae, whose synonym is Lonchocarpus laxiflorus. It grows to 4 to 8 metres tall, with grey or yellowish bark, compound leaves, and purple flowers on multi-branched panicles. The fruit is a papery pod, usually holding one seed. It is widely distributed in West Africa, Central Africa, the African Great Lakes and Northeast Africa, in savanna woodlands and dry forested areas. Wikipedia says it is used across its range in traditional medicine, for example a root decoction in vapour baths for mental illness in Benin, and a root macerate drunk for intestinal worms in the Central African Republic. In traditional Acholi culture in northern Uganda, before a war an old woman of the chief's clan blessed the warriors' weapons by sprinkling them with a branch dipped in water and millet flour. In Apac District, water sprinkled with its branches around a home was used to ward off evil spirits.