⚠ Version 1 of The Plant List has been superseded.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.

Calliergon giganteum var. crassicostatum Mikut. is a synonym of Calliergon giganteum f. crassicostatum (Mikut.) Karczm.

The record derives from Tropicos which reports it as a synonym (record 35153418) with original publication details: Bryoth. Balt. 207 207 1913.