A map of members of the African Union by each of their form of government (Cape Verde missing).
World's states coloured by form of government as of 2011
There's below a list of colors with the system of government.

blue - presidential republics, full presidential system
green - presidential republics, executive presidency linked to a parliament
yellow - presidential republics, semi-presidential system
orange - parliamentary republics
red - parliamentary constitutional monarchies in which the monarch does not personally exercise power
magenta - constitutional monarchies in which the monarch personally exercises power, often alongside a weak parliament
purple - absolute monarchies
brown - republics whose constitutions grant only a single party the right to govern
olive - military dictatorships
Note that several states constitutionally deemed to be multiparty republics are broadly described by outsiders as authoritarian states. This chart aims to represent de jure form of government, not de facto degree of democracy. Those more interested in a version reflecting such judgements may be interested in Image:Form of government with Freedom House.png.
African Union member states by form of government.png
PNG version: KoavfDerivative work: JCRules