S. andigenum Juz. et Buk. var. imilla Buk. et Lechn. f. ccompis Buk. et Lechn.

S.M. Bukasov. Potatoes of South America and their breeding use, Leningrad, 1933, p. 67.
Diagnosis: The only white flower form in Peru and the second in Bolivia is much wider expanded, known in Bolivia under the name Janco-imilla, in South Peru under the name Ccompis. A wider expansion is approximately connected with a bigger productivity.
Tubers are very short, strongly dory, eyes are deep, tubers are violet corresponding to absence of corolla color, more often very pale colored, sometimes almost white, usually slightly speckled, near eyes with uncolored areas under eyebrows of a different size, an eyebrow and an eye of a darker color in skin. Corolla color is yellowish, anther filaments are yellowish.
Cultivated in South Peru, dep. Cuzco: Ppisacc (Juz. 989), Yancai-pampa (Juz. 1230), Ccaca-cuyo (Juz. 1233), Puquiura (Juz. 1271), Tampu-machai (Juz. 1289), Yana machai (Juz. 1285, 1286 and others), Ckeccayoc (Juz. 1133), Huaccotto (Juz. 1355); in Urubamba region: Ollantaytambo (Juz. 1044).
Indigenous names in Peru: Ccompis and others.
In Bolivia it is cultivated in La Paz region (Juz. 1666, 1663, 1807).