⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-26611932, with some changes.
This name is a synonym of Equisetum × mackaii .
The record derives from Tropicos which reports it as a synonym (record 26611932
) with original publication details: Flora 20(22): 308 308 1839.