Coloured SEM of a thorn on a rose stem

Coloured SEM of a thorn on a rose stem

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This image is part of the feature Rose Under The Microscope

Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Rose thorn. Coloured scanning electron micrograph (SEM) of a thorn on the main stem of a rose plant, Rosa sp.. Thorns are short modified branches that terminate in hard sharp points. The huge variety of roses that have been cultivated differ not only in their flower types but in the size and relative number of thorns they possess. The wild rose has small prickles by which it may cling to, and scramble over, vegetation. Larger thorns however, such as the one seen here, can protect the plant from being eaten by large herbivores. Magnification: x6 at 6x7cm size. Magnification: x20 at 6x8inch size.

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Keywords: botany, nature, plant, plants, rosa sp., rose, thorn

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