Abstract
In the previous paper, the author reported some results concerning the correlation between growth of the primary roots and development of the leaves at the successive nodes of the main stem. In this expeliment, the author observed that correlation exists between development of the branch roots and the leaves. 1. The secondary roots began to branch regularly, with the elongation of the primary roots, from the base of the primary roots to the tip. 2. Development of the primary roots, secondary, tertiary and the fourth roots etc. proceeded at the same pace as the emergence period of the leaves. 3. When the growth of the above-ground parts was restrained and also when the growth of the roots was promoted by cutting, the development of the branch roots and emergence of the leaves showed the regularity which was recognized above. Judging from these results, we are assured that the close relationship exists in these matters. 4. We also can use the degree of development of the branch roots as a standard to distinguish old and the new roots.
