Huang Q-L, Fei W-Q, Wu H-S, Yuan Q, Yang Q-E. Clematis chengguensis and C. retusifolia (Ranunculaceae), both described from Shaanxi of China, are merged with C. armandi, a widely distributed species in the country. Phytotaxa [Internet]. 2024 Oct. 23 [cited 2025 Jul. 16];669(3):211-32. Available from: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.669.3.3