There are two plants referred to as apulid in the Philippines.

water caltrop
scientific name: Trapa natans, and another species Trapa bicornis

the Chinese water chestnut that Americans are familiar with
scientific name: Eleocharis dulcis, among other species

People in the old days would say apulid tsina (Chinese chestnuts).

Because Filipinos refer to brown chestnuts as kastanyas, they sometimes force-translate “water chestnut” as tubig kastanyas, but this is not common.

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