⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-35153418, and has not been changed.
This name is a synonym of Calliergon giganteum f. crassicostatum .
The record derives from Tropicos which reports it as a synonym (record 35153418
) with original publication details: Bryoth. Balt. 207 207 1913.