⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-35104410, and has not been changed.
This name is a synonym of Ptilium crista-castrensis f. gracilescens .
The record derives from Tropicos which reports it as a synonym (record 35104410
) with original publication details: Verh. Naturwiss. Vereins Hamburg 7: 40 40 1900.