Article 62.4 of the International Code of Nomenclature for algae, fungi, and plants explicitly states that genus names ending in -oides are feminine, so the correct name of the species when transferred to Callianthemoides is Callianthemoides semiverticillata. However, Tamura incorrectly used the masculine ending -us (i.e. C. semiverticillatus), which some sources have copied. The adjective verticillatus means "whorled", so that the epithet semiverticillata means "half or partially whorled".
