is analogous short-lived plant which grown in the mountain region of Maxian mountains has a life period of about 100 days. The seed embryos of mature fruits are hypoplastic with after-ripening characteristics, including both phases of morphological after-ripening and physiological after-ripening. Therefore，the seeds treated at a given low temperature can only complete after-ripening and be removed from dormancy. Thjs study shows that the optimum temperature for fulfilling morphological after-ripening is about 7°C. Under all over 100 days treatment at 7°C the embryos can develop to mature．Under a further over 70 days treatment at 7°C the seed can accomplish physiological after-ripening. This plant has a long period of seed dormancy and its seeds require an over 170 day treatment at a low temperature to germinate．This study provides a suitable range of temperature and duration of low temperature treatment for the seed germination of
, and provides the scientific basis for increasing the germinating rate of the seed and shortening the cultivating days.