Plants of H. tosana A a form corresponding to var. caput-avis (JPN6524) B a form corresponding to var. tosana (JPN6555). Scale bars: 5 cm (A, B).

 
 
  Part of: Yahara T, Hirota SK, Fujii S, Kokami Y, Fuse K, Sato H, Tagane S, Suyama Y (2023) Molecular phylogeny and taxonomy of Hosta (Asparagaceae) on Shikoku Island, Japan, including five new species, one new subspecies, and two new status assignments. PhytoKeys 235: 137-187. https://doi.org/10.3897/phytokeys.235.99140