Based on the phenotypic, micromorphological, and genetic analysis, three species are recognized in the genus Camptotheca Decaisne: C. acuminata Decaisne, C. lowreyana Li, and C. yunnanensis Dode. Camptotheca acuminata consists of three varieties: var. acuminata, var. tenuifolia Fang et Soong, and var. rotundifolia Yang et Duan. Camptotheca lowreyana has three newly developed high CPT-yielding cultivars, namely ‘Katie’, ‘CT168’, and ‘Hicksii’
Li, Shiyou, "Taxonomy of Camptotheca Decaisne" (2014). NCPC Publications and Patents. Paper 38.