[1]
Yuan, Q. and Yang, Q.-E. 2022.

Taxonomic studies on the genus Delphinium (Ranunculaceae) from China (XXII): Clarifying morphological distinction between D. drepanocentrum and D. umbrosum and synonymizing D. umbrosoides with D. drepanocentrum

. Phytotaxa. 572, 3 (Nov. 2022), 243–258. DOI:https://doi.org/10.11646/phytotaxa.572.3.3.