⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-50083472, with some changes.

Polemonium robustum Rydb. is a synonym of Polemonium foliosissimum subsp. robustum (Rydb.) Brand

This name is a synonym of Polemonium foliosissimum subsp. robustum (Rydb.) Brand.

The record derives from Tropicos which reports it as a synonym (record 50083472) with original publication details: Bull. Torrey Bot. Club 31(12): 635 635 1904.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:205096-2.