Girish Mahajan (Editor)

Eucommia ulmoides

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Kingdom  Plantae
Clade  Eudicots
Order  Garryales
Scientific name  Eucommia ulmoides
Higher classification  Eucommia
Clade  Angiosperms
Clade  Asterids
Family  Eucommiaceae
Conservation status  Near Threatened
Rank  Species
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Similar  Achyranthes bidentata, Rehmannia glutinosa, Female ginseng, Eucommia, Wolfiporia extensa

Eucommia ulmoides hardy rubber tree

Eucommia ulmoides is a species of small tree native to China. It belongs to the monotypic family, Eucommiaceae. It is near threatened in the wild, but is widely cultivated in China for its bark and is highly valued in herbology such as Traditional Chinese medicine.


Eucommia ulmoides Eucommia ulmoides

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Eucommia ulmoides Eucommia ulmoides Hardy Rubber Tree Plant Database University

Eucommia ulmoides grows to about 15 m tall. The leaves are deciduous, arranged alternately, simple ovate with an acuminate tip, 8–16 cm long, and with a serrated margin. If a leaf is torn across, strands of latex exuded from the leaf veins solidify into rubber and hold the two parts of the leaf together. It flowers from March to May. The flowers are inconspicuous, small and greenish; the fruit, June to November, is a winged samara with one seed, very similar to an elm samara in appearance, 2–3 cm long and 1–2 cm broad.


Eucommia ulmoides Gumojilm jilmov Eucommia ulmoides This tree originally Flickr

Eucommia ulmoides is the sole living species of the genus Eucommia. Eucommia is the only genus of the family Eucommiaceae, and was formerly considered to be a separate order, the Eucommiales. It is also sometimes known as "Gutta-percha tree" or "Chinese rubber tree", but is not related to either the true Gutta-percha tree of southeastern Asia, nor to the South American rubber tree.


Eucommia ulmoides httpsuploadwikimediaorgwikipediacommonsthu

Eucommia ulmoides is also occasionally planted in botanical gardens and other gardens in Europe, North America and elsewhere, being of interest as the only cold-tolerant (to at least -30 °C) rubber-producing tree. Fossils of other Eucommia species have been found in 10- to 35-million-year-old brown coal deposits in central Europe and widely in North America (Call & Dilcher 1997), indicating that the genus had a much wider range in the past.


Eucommia ulmoides Eucommia ulmoides Eucommiaceae image 16491 at PlantSystematicsorg

It is one of the 50 fundamental herbs used in Chinese herbology, where it is called dùzhòng (Chinese: 杜仲). Because of the low production and high demand for natural rubber in China, a unique process has been developed to manufacture elastic materials with Eucommia ulmoides gum (EUG) as substitutes for natural rubber products. Unlike the latex used to produce natural rubber, the EUG is the polymer trans-1,4-polyisoprene. Thus materials made from EUG may demonstrate characteristics other than those of natural rubber, such as higher elastics, lower thermoplastic temperature, etc.


The iridoid glucoside geniposidic acid can be found in E. ulmoides.

Eucommia ulmoides Eucommia ulmoides
Eucommia ulmoides Eucommia ulmoides Hardy Rubber Tree
Eucommia ulmoides Eucommia ulmoides Oliv Discover Life


Eucommia ulmoides Wikipedia

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