Galium trifidum var. tinctorium (Linnaeus) Torrey & A. Gray

Galium trifidum var. tinctorium (Linnaeus) Torrey & A. Gray is a synonym sensu TROPICOS of:

Hydrogalium claytonii (Michaux) Kadereit & Schneeweiss, an accepted species name sensu Kadereit & Schneeweiss, 2026.