Tomostima is a genus of flowering plants belonging to the family Brassicaceae.

Its native range is Northern America, Peru to Southern South America.

Species Six species are accepted. Tomostima araboides (Wedd.) Al-Shehbaz, M.Koch & Jordon-Thaden Tomostima australis (R.Br. ex Hook.f.) Al-Shehbaz, M.Koch & Jordon-Thaden Tomostima cuneifolia Tomostima platycarpa Tomostima reptans Tomostima sonorae

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