Cyathula species ?- Sri Lanka

130713 ASP 103 : Attachments (1). 2 posts by 2 authors.
Please ID this prostrate herbaceous plant with medicinal properties. Flowers are pink/brown. Takem in Sri Lanka in May 2012.

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Cyathula sp?

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Can it be Pupalia lappacea var. argyrophylla as per POWO, though I am not convinced?

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Pl. also see
https://tsammalex.clld.org/parameters/pupalialappacea

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Another possibility is Cyathula prostrata, but I am not finding such leaves. 

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Celosia polygonoides Retz.

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