1994 年 59 巻 4 号 p. 471-477
We investigated inner morphology and development of the shoot apical meristem of a day-neutral species Pectis papposa Gray before and after floral initiation from day 2 to day 8 after sowing. Initiation of reproductive phase, which was represented morphologically by bract formation, coincided with histological observations showing disturbance of the tunica-corpus boundary.