Section Cortusoides Type specimen: Dessiatowa s.n. 1913. (Fergana Distr.) resides at LE?
P. lactiflora (nom illeg.): Turkev., Bot. Mater. Gerb. Glavn. Bot. Sada R.S.F.S.R. 2: 13. 1921. (also known as Syst. Herb. Hort. Petrop.) Type specimen: Dessiatowa s.n. 1913. (Fergana Distr.) resides at LE? Distribution: Pamir and Altai Mountains, S Kyrgyzstan and Tadzhikstan.
This species was known as P. lactiflora Turkevicz but it has been determined that the name was previously used (nom illeg.). It is very similar to P. kaufmanniana but is distinguished by its white flowers with a narrow purple tube.