ABSTRACT
Zingiber mioga Rose, belongs to the family Zingiberaceae and is native and endemic to Japan. In spring, the plant develops new underground rhizomes from the base of pseudostems sprouted earlier on old rhizomes. From June to October apical bud of individual rhizomes emerges above ground, differentiating into inflorescences. The foliage leaves sprouted in the spring have long sheathes forming the pseudo-stems, which die back annually due to winter frost after a long vegetative growth. The photoperiodic response of myoga for flowering is quantitative. Temperature does not seem to be critical neither for floral induction nor for their development. The rhizome of myoga has a period of summer dormancy in its life cycle. The onset of dormancy is presumed to take place immediately after inflorescence initiation. Foliage leaves sprouted early in the spring from rhizomes of the previous year continue to grow during the summer, whereas the underground buds remain dormant.
