kingfisher with ume tree

The plum said in Japan is not plum said in English.

According to Wikipedia, this plum is described to be Japanese apricot.
However, this apricot is a plant called anzu in Japan,
so, I think that the name of apricot is somewhat strange in the thing of ume.

We are saying that have red colored ume  flower as a koubai, and  having so many kind of koubai,
such as kagoshima koubai,Higo komadome. But,I don't know details of that "which is which".