Functional characteristics of starches from the root of Cynanchum auriculatum Royle ex Wight grown in China

► Characteristics of Cynanchum auriculatum Royle ex Wight starches were assessed. ► Physicochemical properties and nutritional fractions varied from different cultivars. ► Structural variations among starches influenced their properties. ► Digestibility were dependent on crystal structure and long-chain amylopectin.