Castanea mollissima Blume (Synonym : Castanea bungeana Blume)

Family : Fagaceae

Castanopsis cuspidata (Thunb.) Schottky (Synonym : Castanopsis thunbergii (Makino) Hatus.)

Family : Fagaceae

Castanopsis sieboldii (Makino) Hatus. ex T.Yamaz. & Mashiba (Synonym : Lithocarpus cuspidata (Thunb.) Nakai var. sieboldii (Makino) Nakai)

Family : Fagaceae

Catalpa ovata G.Don (Synonym : Catalpa bignonioides var. kaempferi DC.)

Family : Bignoniaceae

Catalpa speciosa Teas (Synonym : Catalpa bignonioides Walter var. speciosa (Teas) Meehan)

Family : Bignoniaceae

Catapodium rigidum (L.) C.E.Hubb. (Synonym : Poa rigida L.)

Family : Poaceae [Naturalized plant]

Catolobus pendulus (L.) Al-Shehbaz (Synonym : Arabis ligulifolia Nakai)

Family : Brassicaceae

Caulophyllum robustum Maxim. (Synonym : Leontice robusta (Maxim.) Diels)

Family : Berberidaceae

Causonia japonica (Thunb.) Raf. (Synonym : Cayratia japonica (Thunb.) Gagnep.)

Family : Vitaceae

Cedrus deodara (Roxb. ex D.Don) G.Don (Synonym : Pinus deodara Roxb. ex D.Don)

Family : Pinaceae