⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-35107557, with some changes.
This name is a synonym of Philonotis calcarea f. aquatica .
The record derives from Tropicos which reports it as a synonym (record 35107557
) with original publication details: Mém. Soc. Sci. Nat. Cherbourg 36: 425 425 1908.