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metal prints flowers still life metal prints flower metal prints angiosperm metal prints angiosperms metal prints asteraceae metal prints botany metal prints compositae metal prints dispersal metal prints flower head metal prints onopordum acanthium metal prints plant metal prints seed metal prints seeds metal prints thistle metal prints wind borne metal prints

photographs flowers still life photos flower photos angiosperm photos angiosperms photos asteraceae photos botany photos compositae photos dispersal photos flower head photos onopordum acanthium photos plant photos seed photos seeds photos thistle photos wind borne photos

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Close-up of the flowering head of a cotton thistle (Onoperdum acanthium) after pollination, showing the seeds. The seeds (black) have a tuft of fine hair at one end. This is to allow them to be easily carried by the wind away from the parent plant. The spines of the thistle flower head protect the seeds from birds and small animals which would eat them. The thistle is commonly found on waste ground and bare areas, preferring sandy soil. The flowers appear between July and September. (5th of 5 images).