The aim of this work was to identify the degree of tepal bend shape variation in representatives of six Colchicum s.l species: C. laetum L., C. ancyrense B. L. Burtt, C. bulbocodium var. versicolor (Ker Gawl.) K. Perss, C. umbrosum Steven, C. trigynum (Steven ex Adam) Stearn, C. eichleri (Regel) K. Perss. In each of the 53 populations located in the territory of European Russia, 30 plants were studied. The analysis of tepal bend shape variation was carried out using the geometric morphometry method. Principal Component Analysis (PCA) showed that C. laetum and C.
