| Abstract: | From observations of leaf emergence dates and periodical dissectionsof stem apices it appears that leaf initiation does not keeppace with leaf emergence during the spring. This leads to asubnormal number of enclosed leaf initials at each stem apexat some time in April or May. Forced plants behave similarly,and it is concluded from these results and from direct experimentsthat part of the lag of leaf initiation on leaf emergence isconnected in some way with the flowering of the first inflorescenceto emerge from the crown. Conditions in the bud at the end ofthe winter also lead to an excess of leaf emergence over leafinitiation in the early spring. |
