S.M. Bukasov. Potatoes of South America and their breeding use, Leningrad, 1933, p. 41
Diagnosis: the cultivar type Rosada is worth describing. It stands out for its relative constancy in propagation, and also for a red color of tubers which occurs rarely in Columbia.
Distinguishing characters: short pedicle above as well as below articulation, small calyx and a long style 11-12 mm long, strongly overtopping the stamens.
Inflorescences are with single upper leaves on pedicles. Pedicle is thin, colored. Calyx is with trapeziform lobes, narrow acumens with the size of 1/3 - ? of calyx length and more.
Corolla is strongly split (stronger than Tocana), lilac with half-light reddish star. Tube and filaments are like by the rest of the forms v. colombianum.
Anthers are close to Caiceda, but the column is conic, filaments are yellow, more than 1 mm (3/64 dm) thick. Ovary from the wider side is globular. Forms berries.
Cultivated in the adjacencies of Bogota. The local name Rosada (which means pink in Spanish) indicates the color of tubers.
In sexual progeny the constant length of pedicle, shape of calyx, lilac corolla color (rarely white, violet and blue are absent), position of anthers, long style (about 18 mm long), globular ovary, berries formation.
The following characters vary: length and density of pedicle pubescence, length of calyx acumens, anther size (5-7,5 mm), colored corolla star and pedicle. Finally, only minor characters vary and sexual progeny is pretty homogeneous and close to the main form. In the progeny the forms close to tocanum, caiceda etc. do not occur. Perhaps, an opposite occurrence takes place.
Together with the forms which can be easily united in one Columbian group, two standalone forms of S. andigenum are cultivated in Columbia: the so-called Papa Londres (var. hederiforme) and two accessions from Popayan, closer to Peruvian forms ( №№ 98а and 110а).