Desmodium triflorum
[Lesser Clover-leaved Desmodium, Tick Clover, Creeping Tickfoil]

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DSC06958 (14)
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DSC04154 (09)
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DSC04155 (09)
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DSC04159 (09)

Close-up view:

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P5010159 (17)
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P5010162 (17)