Thistle seed heads (Cirsium arvense)

Thistle seed heads (Cirsium arvense)

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Credit: ANN PICKFORD/SCIENCE PHOTO LIBRARY

Caption: Creeping thistle seed heads (Cirsium arvense). The seed heads form after the flowers are fertilised. Each seed can then be blown on the wind to a new location, and may take root to form a new plant.

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Keywords: biological, biology, botanical, botany, cirsium arvense, creeping thistle, dispersal, head, heads, many, multiple, nature, plant, reproduction, reproductive, seed, seeds, thistle, wind

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