Viola semilunaris Viola herbivaga Viola lunata Viola toppingii Viola yakusimana Viola carlesii Viola verecunda Viola distans Viola alata Viola excisa Viola arcuata Viola arcuata var. verecunda Viola hupeiana Viola verecunda f. radicans Viola arcuata f. radicans Viola verecunda var. semilunaris Viola fibrillosa Viola alata subsp. verecunda Viola verecunda f. hensoaensis Viola verecunda f. candidissima
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024