S.M. Bukasov. Potatoes of South America and their breeding use, Leningrad, 1933, p. 74.

Diagnosis: A form perhaps close to stenophyllum, from which it varies in basiscopity of lobes and pale corolla color.
Calyx is apparently bilabiate, dissection of corolla is stronger, anther column is slightly conic (same by stenophyllum). Style is thin (but slightly thicker than by stenophyllum).
Tuberization is very bad. Juz. 1501, La Paz.