⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-100243898, with some changes.

Platanthera hyperborea subsp. dilatata (Pursh) K. Richt. is a synonym of Piperia dilatata (Pursh) Szlach. & Rutk.

This name is a synonym of Piperia dilatata (Pursh) Szlach. & Rutk..

The record derives from Tropicos which reports it as a synonym (record 100243898) with original publication details: Pl. Eur. 1: 281 281 1890.