Coloured Scanning Electron Micrograph (SEM) Of A Freeze fractured Water Lily Stem Showing Numerous Vascular Bundles (blue) And Large Intercellular Air Spaces (holes). Magnification: When Printed At 10 Centimetres Wide.
Young pine tree stem. Light micrograph of a section through a one year old primary pine (Pinus sp.). The cells of the outer epidermis (red) are thick-walled and covered with a thick layer of cuticle to prevent water loss. Beginning to form underneath the epidermis is the cork cambium (phellogen) which has produced 2 to 3 layers of cork (orange), this helps to resist forest fires. The vascular cyli