Morphologically related taxon in terms of flower, corolla tube and calyx ratio. A Pin flower of Primula longipes subsp. bayburtensis B thrum flowers of P. longipes subsp. bayburtensis C thrum flowers of P. longipes subsp. longipes.

 
 
  Part of: Sefalı A, Yapar Y, Demir İ, Yurtvermez B, Keser AM (2025) Primula longipes subsp. bayburtensis Sefali, Yapar & Demir (Primulaceae): A new taxon from north-eastern Anatolia, Türkiye. PhytoKeys 256: 141-150. https://doi.org/10.3897/phytokeys.256.150268