Chinese Green Tree Viper

Trimeresurus stejnegeri grows to a maximum total length of 75 centimetres (30 in), which includes a tail length of 14.5 centimetres (5.7 in). The males have hemipenes that are short and spinose beyond the bifurcation. The dorsal scales are arranged in 21 longitudinal rows at midbody. There are 9–11 upper labials, of which the first are separated from nasal scales by a distinct suture. The supraoculars are single, narrow, and sometimes divided by a transverse suture. There are 11–16 scales in a line between the supraoculars. The ventrals number 150–174, and the subcaudals are 54–77. All of the subcaudals are paired. The color pattern is bright to dark green above, pale green to whitish below, the two separated by a bright bicolored orange or brown (below) and white (above) (males) or bicolored or white only (females) ventrolateral stripe, which occupies the whole of the outermost scale row and a portion of the second row. Bamboo vipers are carnivores: they eat small rodents, birds, frogs, and lizards. Yellow colored mutants have been reported.

Trimeresurus stejnegeri is found in India (Western Ghats & Eastern Ghats, Northeast India) and Nepal through Myanmar and Laos to much of southern China (Yunnan, Sichuan, Gansu, Jiangxi, Jiangsu, Hunan, Hubei, Guizhou, Guangxi, Guangdong, Hainan, Fujian, Anhui, Zhejiang), Vietnam, and Taiwan. The type locality was originally listed as "Shaowu, Fukien Province, China", and later amended to "N.W. Fukien Province" by Pope & Pope (1933) (Fukien being the former romanization of Fujian). this snake is often confused with Trimeresurus, Ahaetulla oxyrhyncha in India.

The specific name, stejnegeri, is in honor of Leonhard Stejneger, the Norwegian-born, American herpetologist who worked at the Smithsonian Institution for over 60 years.