“Diagram showing how the vascular bundles anastomose around the medullary rays. The gaps represent the rays.” -Stevens, 1916
William Chase Stevens Plant Anatomy (Philadelphia, PA: P. Blakiston, 1916)
934×2400, 473.2 KiB
398×1024, 77.8 KiB
249×640, 41.1 KiB
124×320, 15.6 KiB