The relationships between Bach Ma’s flora and others

 The relationships between Bach Ma’s flora and others gradually decreases by the latidue, it is close with florasa of Nothern of Central and is trange with others from Southern and Western-North.

Those relationships are similar in members of each areas: (Eastern North: Lang Son and Quang Ninh; North of the Central: Pu Mat, Phong Nha - Ke Bang and Bach Ma; South of the Central part: Ba Na - Nui Chua and Song Thanh; Southern: Cat Tien and Yok Don) and the realationship of Hoang Lien’s flora with the flora of Eastern North is similar to flora of North of Central. However, the relationships of Hoang Lien’s flora with others are very low, special in species degree.