The observation on the flowering biological characteristics and the pollination test about early lilac (Syringa oblata)and its variety (Syringa oblata var. affinis, white flowered early lilac) were carried out on the compus of Shanxi Agri. Univ.in 1995~1997. The results are described as follows: the flowering period of single inflorescence was 5~7 days and that of the whole tree was 7~11 days in the white variety.It was 1~2 days later for the early lilac species than its variety. The germination percentage...