|Ulmus bergmanniana var. bergmanniana|
U. b. var. bergmanniana
|Ulmus bergmanniana var. bergmanniana|
U. bergmanniana var. bergmanniana is endemic to mountain slopes at elevations of 1500–2600 m in the Chinese provinces of Anhui, Gansu, Henan, Hubei, Hunan, Jiangxi, Shaanxi, Shanxi, Sichuan, Yunnan, and Zhejiang.
The tree is distinguished by Fu (2002) as having "Leaf blade adaxially densely hirsute when young; (later) glabrescent with tufted hairs only remaining in axil of veins. Flowers and fruits February–April".
No information available.
This variety is extremely rare in cultivation in Europe and North America. There are no known cultivars of this taxon, nor is it known to be in commerce.
Ulmus bergmannianaC.K.Schneid., commonly known as Bergmann's elm, is a deciduous tree found across much of China in forests at elevations of 1500–3000 m.
Ulmus changiiW. C. Cheng, occasionally known as the Hangzhou elm, is a small deciduous tree found across much of China in forests at elevations of up to 1800 m. Owing to its increasing scarcity, U. changii was added to the Hainan Province Protected Plants List in 2006.
Ulmus elongataL. K. Fu & C. S. Ding , also known as the long raceme elm in the US, is a deciduous tree endemic to broadleaf forests in the eastern provinces of China.
Ulmus glaucescensFranch., the Gansu elm, is a small deciduous tree from the northern provinces of China, where it is found along river valleys and on mountain slopes at elevations of 2000–2600 m.
Ulmus microcarpa was named and first described by the Chinese botanist L. K. Fu, who discovered the tree in the Chayu broad-leaved forests of south-eastern Xizang at altitudes of around 2800 m during the 1973 Qinghai - Tibet Expedition. Unlike the majority of Tibet, the Chayu region has a subtropical highland climate featuring warm, wet, summers and mild, dry, winters. Commonly known as the Tibetan Elm, the tree was introduced to the United States in 2006, and the UK in 2013; it remains one of the rarest species of elm in cultivation.
Ulmus prunifoliaW. C. Cheng & L. K. Fu, the cherry-leafed elm, is a deciduous tree endemic only to the province of Hubei in central eastern China, where it is found at elevations of 1000–1500 m.
Ulmus chumlia is a small deciduous tree endemic to the Himalaya from the Kashmir to central Nepal, and the provinces of Yunnan, Sichuan and Xizang (Tibet) in China. It is found in broadleaf forest on mountain slopes at elevations of 1000–3000 m. Richens noted that the species appeared to be the same as that named by Grudzinskaya as Ulmus androssowii var. virgata, which she considered an intermediate between U. minor and U. pumila.
Ulmus harbinensisNie & Huang, also known as the Harbin elm, is a small elm found only in the province of Heilongjang in the northeastern extremity of China, where it occurs in mixed forest.
Ulmus pseudopropinquaWang & Li, occasionally known in the United States as the Harbin spring elm, is a small deciduous tree found only in Heilongjiang, the northeasternmost province in China. The tree has not been studied comprehensively, and it has been speculated it may be a natural hybrid of Ulmus davidiana var. japonica and Ulmus macrocarpa.
Ulmus szechuanicaFang, known as the Szechuan (Sichuan), or red-fruited, elm, is a small to medium deciduous Chinese tree found along the Yangtze river through the provinces of Sichuan, Jiangxi, Anhui, and Jiangsu.
Ulmus bergmanniana var. lasiophyllaC. K. Schneid. is endemic to China, on mountain slopes at elevations of 2100–2900 m in Gansu, Shaanxi, north-west Sichuan, south-east Xizang, and north-west Yunnan.
Ulmus changii var. changii is a variety of tree endemic to elevations of 200 m (660 ft) – 800 m (2,600 ft) in the Chinese provinces of Anhui, Fujian, Hubei, Hunan, Jiangsu, Jiangxi, Sichuan, and Zhejiang.
Ulmus changii var. kunmingensisW. C. Cheng, occasionally referred to as the Kunming elm, is a Chinese tree endemic to montane forests at elevations of 600–1800 m in the provinces of Guangxi, Guizhou, Sichuan, and Yunnan.
Ulmus glaucescens var. glaucescens is a Chinese tree endemic to mountain slopes at elevations of 2000–2400 m in the provinces of Gansu, Hebei, Henan, Liaoning, Nei Mongol, Ningxia, eastern Qinghai, Shaanxi, Shandong, and Shanxi.
Ulmus glaucescens var. lasiocarpaRehder, named the hairy-fruited glaucescent elm in the United States, is a Chinese tree found along rivers and mountain slopes at elevations of 2500–2600 m in the provinces of Hebei, Henan, Liaoning, Nei Mongol, Ningxia, eastern Qinghai, and Shanxi.
Ulmus macrocarpa var. glabraNie & Huang is restricted to mixed forest in the Chinese province of Heilongjang.
Ulmus macrocarpa var. macrocarpaL. K. Fu is found on hillslopes and in valleys at elevations of 700–800 m in the Chinese provinces of Anhui, Gansu, Hebei, Heilongjang, Henan, Hubei, Jiangsu, Jilin, Liaoning, Nei Mongol, eastern Qinghai, Shaanxi, Shanxi, Shandong. Beyond China it is also found in Korea, Mongolia, and Russia (Siberia).
Ulmus davidiana var. davidiana is variety of elm. The tree is restricted to the Chinese provinces of Hebei, Henan, Shaanxi and Shanxi.
Professor Li-kuo Fu worked for the Institute of Botany at the Chinese Academy of Sciences, Beijing. The author of numerous treatises on Chinese plants, notably the China Red Data Book of rare and endangered species in the 1990s. In 1973, he took part in the Qinghai - Tibet Expedition, during which he discovered and named the Tibetan elm, Ulmus microcarpa.