Hydrocotyle verticillata
[Whorled Pennywort]

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Close-up views:

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Reference:

Lim, R. C. J., A. T. K. Yee, X. Y. Ng & H. T. W. Tan, 2014. Whorled pennywort, Hydrocotyle verticillata Thunb. (Araliaceae), a new record of a casual aquatic macrophyte in Singapore. Nature in Singapore, 7: 79-91. | Read article |