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I think your clovers might be wood-sorrels, judging by the flowers. Compare the pictures on Wikipedia for wood-sorrel (http://en.wikipedia.org/wiki/Oxalis) and clover (http://en.wikipedia.org/wiki/Clover). The clover flowers are more like spiky balls, while the wood-sorrels are more generic flowers that look similar to what you have here.
Spotted on Apr 3, 2011 Submitted on Apr 3, 2011
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