Maackia taiwanensis is an endemic tree species and an endangered species of Taiwan. The purpose of this study was to examine the germination characteristics and storability of seeds of M. taiwanensis. The effects of the seed moisture content (MC) and storage temperature on germination were investigated to determine the seed storage behavior and evalute the feasibility of long-term seed storage for ex situ conservation of this rare species. Results showed that seeds of M. taiwanensis were non-dormant. Fresh mature seeds of 2 seedlots of M. taiwanensis completely germinated within 4 wk under fluctuating temperatures of 30/20℃ with 8 h of light. Moreover, stratification at 4℃ did not efficiently improve the germination percentage but significantly decreased the mean germination times (MGTs). Though the MGT of fresh mature seeds was significantly reduced from about 15 d to about 8 d after only 1-mo stratification at 4℃, pretreatment with stratification at 4℃ for germination of M. taiwanensis is not practical for nursery operations due to this species’ quick germination characteristic. In addition, seeds began to germinate after stratification at 4℃ for 6 mo, and almost all viable seeds also germinated under a moist dark condition within 6~14 mo. Therefore, moist stratification at 4℃ is not workable to store seeds of this species. However, seeds of M. taiwanensis dried to 2.5~7.8% MCs (on a fresh-weight basis) still maintained viability after 2 yr of storage at -20, 4, and 15℃. From the results, seeds of M. taiwanensis can tolerate desiccation and sub-zero temperatures, which qualifies them as orthodox. In short, seeds of M. taiwanensis can be stored over a long-term period to ensure future seed supplies. If seed storage of M. taiwanensis is used for plant germplasm collection and long-term conservation, we recommend that seeds of M. taiwanensis be dehydrated to 3~7% MCs and then hermetically sealed before storage at -20℃.