Not a very common spice. It is a member of the ginger family, alligator pepper, with the scientific name "Afromomium meleguata" and is also known as grains of paradise, hepper pepper or mbongo spice. It is a North African spice and is used in Africa not only in food preparation but also in cultural practices, as medicine and as an accompaniment to kola nut.
But guess what, grains of paradise is a little different from it,
they are so closely related that it is also called the same name, the
difference with the two is that grains of paradise is sold as only seeds
while alligator pepper is sold as an entire pod which contains the
seed, apart from that the taste and characteristics are but the same.