It is an erect annual plant that grows from 15 to 45 cm tall.

This species lacks a scape but has cymose inflorescences that are 4–13 cm long.

S. cordifolium is found throughout tropical Australia, including northern Western Australia, in its typical habitat of swamp margins or moist sandy creekbanks.

S. cordifolium is most closely related to S. javanicum, which has smaller leaves, sepals, capsules, and seeds.

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