S.V.Juzepczuk, S.M.Bukasov. Bulletin of  All-Union congress on genetics, breeding, seed producing and pedigree stock-breeding in Leningrad, 10-16 of January, 1929, v.3, p. 607.

S. chaucha Juz. et Buk. nov. sp. ad interim. Affinis
S. phurejae Juz. et Buk., a quo discedit floribus et imprimis
antheris submajoribus, filamentis crassioribus praeterea corolla
pallidiore; forma probab. hybridogena. Colitur in Perivia,
dept. Cuzco, prope Cuzco, San Jeronimo (S. Juzepczuk № 1010)
Nom. vernacul.: chaucha.— E Bolivia sub nom. "surimana" allatae
sunt formae a "chaucha" Peruanorum botanice vix sejungendae:
La Paz (idem № 1658, etc.).