I took a double take whilst driving in the thick green bush around Tete today, I thought this seed pod was a snake, pretty close to my open window....The tree is a "cassia abbreviata" (in S.A. called a Sjambok pod tree and in Zimbabwe, a Long-tail cassia). Click on the link attached to find out more about this lovely looking tree.

http://www.plantzafrica.com/plantcd/cassiaabbrev.htm