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Edible parts - Seeds, Leaves, Flowers

A herb. It grows each year from seed. It is erect and the stems are 1-1.5 m tall. The angles are rough. The leaf stalk is 0.3-2.2 cm long. It is rough. The leaf blade is sword shaped and 2.5-7.5 cm long by 1-2.5 cm wide. It is bluish green and hairy. The flower spikes are in axils of leaves or at the tip of branches. They are 1.6-6.5 
A tropical plant. It grows in the tropics in Africa. It can be in savannah woodland and in forests along rivers.