Scanning electron microscope image of a cross-section through a Helianthus annuus (sunflower) vascular bundle, showing the vascular cambium between the phloem and xylem. This image is part of a group on botanical stems (CIL:40378-40395).
Biological Process: Plant stem organization
Image collected on a Zeiss DSM 962 SEM. Complete specimen preparation protocol available at:
Author: Louisa Howard
Source: The Cell: An Image Library