| Each leaf has many pinnae and a leaf axis that is subdivided into a midrib and a petiole. |
| At about the middle of the leaves an incision was made into the midrib of leaves number 2, 5 and 8 from the base. |
| The bulk of axial water movement through the elongation zone occurs through xylem elements in the midrib and large lateral veins. |
| In brief, approximately midway along the length of the leaf an incision was made into the midrib. |
| Thickness was measured at small veins located midway between the midrib and the margin of the leaf blade. |
| For each plant, the coordinates along the axis of the stem and the midrib of each lamina were recorded. |
