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Barrel cactus spines | by Martin LaBar (going on hiatus)
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Barrel cactus spines

This barrel cactus (I think) was growing a few miles East of Julian, San Diego County, California, USA. The spines are about 1 cm/3 inches in length, on a plant about 2/3 meter or 2 feet tall. It is my understanding that these spines are actually leaves. They are sharp.

 

They look even more formidable at the larger sizes.

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Taken on March 1, 2008