Cupressus chengiana var. jiangeensis (N.Zhao) Silba
Restricted to north Sichuan in China where only one original tree survives
Endemic to China in N Sichuan (Longmen Shan, Jiange Xian) (Jiange Xian and Xiaojin Xian in Ying et al. 2003) Known from a single tree
Habitat and Ecology
Presumably similar to var. Cupressus chengiana var chengiana.
Critically Endangered D
Limited to a single tree. There is no measurable historic decline so criterion A cannot be applied. Criterion B cannot be applied as there is no continuing decline under (b), therefore the criterion that must be applied under CR is D.
Only known for certain from a single monoecious tree which occurs well to the east of the main populations of the variety chengiana.
In 1978 local scientists conducted propagation experiments and this resulted in the establishment of young plants in a nursery, however these are thought to have been discarded. This variety is known to be in cultivation in three gardens in the UK; the Royal Botanic Garden Edinburgh, Royal Botanic Gardens, Kew, and Bedgebury National Pinetum.