Bur clover burr, SEM

Bur clover burr, SEM

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Caption: Bur clover burr, coloured scanning electron micrograph (SEM). This burr contains the seed of the bur clover (Medicago polymorpha). The long hooked spikes get caught on the wool or hair of passing animals, helping to disperse the seeds far from the parent plant. This mechanism was the inspiration for hooks and loops fasteners.

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