From Japanese-English FreeDict Dictionary ver. 0.1:
芹 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 芹子 /(en)tʃˈaɪniːz(ja)lˈe̞tə (en)tʃˈaɪniːz(ja)lˈe̞tə/, 水芹 /(en)tʃˈaɪniːz(ja)lˈe̞tə (en)tʃˈaɪniːz(ja)lˈe̞tə/, せり /sˈe̞ɽi/, () セリ /sˈe̞ɽi/ (noun (common) (futsuumeishi))
Note: word usually written using kana aloneJava water dropwort (Oenanthe javanica), Japanese parsley