DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Common horsetail stem. Light micrograph of a longitudinal section through the tip of the condensed stem of the giant horsetail (Equisetum telematia), showing the central stem sourrounded by stem leaves. The stem contains one circle of vascular bundles and many canals.
Model release not required. Property release not required.