Cyperus difformis
[Smallflower Umbrella Sedge]

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Close-up views:

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Below is the inflorescence (flower cluster) of a plant that grew from my pot in January 2015. The fruits, matured over a period of 2 months, were tiny nut-liked structure and greenish-yellow in colour. The dark brown objects among the fruits were likely to be the husks. The distance between the lines of the ruler shown below is 1 millimetre.

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