池杉 chi shan

Cupressus disticha var. imbricata Nuttall, Gen. N. Amer. Pl. 2: 224. 1818; ?C. disticha var. nutans Aiton; Glyptostrobus lineatus (Poiret) Druce; Taxodium ascendens Brongniart; ?T. ascendens var. nutans (Aiton) Rehder; ?T. distichum var. nutans (Aiton) Sweet (1827), not Carriere (1867); T. imbricatum (Nuttall) R. M. Harper; Thuja lineata Poiret.

Main branches ascending. Leaves on annual branchlets not 2-ranked, mostly subulate, a few linear and flat.

Used for afforestation on marshy soils. Anhui, Fujian, Henan (Jigong Shan), Hubei (Wuhan Shi), Jiangsu (Nanjing Shi, Nantong Shi), Jiangxi, Zhejiang (Hangzhou Shi) [native to SE United States]

Vegetative material of var. imbricatum is superficially almost indistinguishable from Glyptostrobus pensilis. However, the appressed, subulate leaves of the former are more distinctly alternate, softer in texture, and with an incurved apex; while the spreading, linear leaves lack the thin, winglike margin along their trailing edge that is a feature of G. pensilis.