Primula strumosa is part of a complex of similar yellow flowered species which also includes: P. hillaris, P. jucunda, P. tanneri, P. tsariensis, P. elongata and P. barnardoana. Considered by John Richards to be a subspecies of the purple P. calderiana, where the two species meet, hybrids of all colors are created, as shown in the last images below. P. calderiana and P. strumosa have overlapping but distinct altitudinal ranges, with P. strumosa found at higher altitudes than P. calderiana. A hybrid with P. griffithii(?) is also shown. Primula strumosa ssp tenuipes has a different leaf shape to the species and is found only in South Tibet. The type locations of this subspecies are Gyirong Xian, Tuodang and Dingjie Xian, Riwu district in Tibet. Images shown of this subspecies are from east of Mt Everest (Kangshung trek). The variety P. strumosa var perlata is considered a synonym of the yellow form of P. tsariensis.