Evaluation location: Wisconsin, United States
A population of the wild potato S. stoloniferum form fendleri (PI 660270) was collected as botanical seeds in the Santa Rita Mountains near Green Valley, Arizona, USA in fall 2010. Original seeds planted for multiplication at the genebank produced two plants with extra whorls of petals, sometimes fused with anthers, and, most remarkably, successive whorls of petals, anthers and carpels nested inside the primary carpel. This mutant was named Matryoshka after the similarly nested Russian dolls.