Fig. 2.

The vascular architecture of Cycas revoluta. (A) C. revoluta leaf; (B–G) transverse sections selected from 125 serial sections along the rachis to illustrate the gradual transformation of the bundles in the distal direction; blue, circle bundles; purple, column bundles; yellow, wing bundles; bundles were numbered from left to right, with numbers 10 and 11 indicated for orientation through the series; scale bar = 2 mm. (H) Illustration of the course of vascular bundles in the distal direction indicating the division and exiting of vascular bundles occupying the most distal wing position in the rachis; colours and numbers correspond to vascular bundles in (B–G).