This name is a synonym.
* Chamaecyparis obtusa f. formosana Hayata, Gard. Chron., ser. 3, 43: 194 (1908).
Chamaecyparis obtusa var. formosana (Hayata) Hayata, Repert. Spec. Nov. Regni Veg. 8: 365 (1910).
Cupressus obtusa f. formosana (Hayata) Clinton-Baker, Ill. Conif. 3: 56 (1913).
Cupressus obtusa var. formosana (Hayata) Dallim. & A.B.Jacks., Handb. Conif.: 215 (1923).
Cupressus obtusa subsp. formosana (Hayata) Silba, J. Int. Conifer Preserv. Soc. 12: 93 (2005).
* Basionym/Replaced Synonym