tosaense[1] Chrysosplenium tosaense (タチネコノメソウ, Tachinekonomesō) is a species of flowering plant in the family Saxifragaceae that is endemic to Japan.

[1][2][4] In 1935, Sutō Chiharu elevated the variety to species rank.

[2] The specific epithet relates to the type locality, Nanokawa in Kōchi Prefecture (formerly Tosa Province).

[1] Chrysosplenium tosaense grows to a height of 5–17 centimetres (2.0–6.7 in) and flowers from April to May.

[1] Chrysosplenium tosaense is endemic to Japan, where it occurs from the Kantō region to the Chūgoku region of Honshū, Shikoku, and Kyūshū.