Abstract: The seeds of oil plant Oenothera biennis L. introduced from Liaoning province were planted at three exper-i mental plots: the schoolyard in Jishou University, Hunan, Zhangguan Town in Yongshun County,Hunan, and the La Ershan Mountain in Fenghuang county,Hunan. The results showed that Oenothera biennis L. can adapt itself to the local environment. As a kind of annual herb, Oenothera biennis L. can bear seeds in the current year.There are two types in southern areas: the early- maturing and the mid- maturing; and while the maturing period of this herb in southern areas is longer than in northern areas, the seed output is smaller.

Key words: Oenothera biennis L., experimental plantat ion, planting technique, biological properties