⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-27101126, with some changes.

Knowltonia rigida var. simplicifolia Harv. is a synonym of Knowltonia bracteata Harv. ex Zahlbr.

This name is a synonym of Knowltonia bracteata Harv. ex Zahlbr..

The record derives from Tropicos which reports it as a synonym (record 27101126).