The holotype specimen of F. groessingii (https://www.jacq.org/detail.php?ID=191435).

 
 
  Part of: Yang L, Li W-J (2025) Ferula groessingii (Apiaceae), a new synonym of Ferula licentiana var. tunshanica. PhytoKeys 254: 21-27. https://doi.org/10.3897/phytokeys.254.145845