Species in the genus Ajuga:

Ajuga x mixta / Juunikiransou ジュウニキランソウ

Juunikiransou, or Ajuga x mixta, is an interspecific hybrid between Ajuga nipponensis and Ajuga decumbens; as is the case, hybridization with another species within the same genus reportedly can occur relatively frequently in various places. This hybrid species looks like Ajuga makinoi in shape and color, but a significant difference lies in the upper lip of its perianth. With A. makinoi, it sharply cuts in, but in A. x mixta, it does not. Bloom time: April-May.