Eucommia ulmoides

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Lamiids
Ordo: Garryales

Familia: Eucommiaceae
Genus: Eucommia
Species: Eucommia ulmoides
Name

Eucommia ulmoides Oliv., 1891
Synonyms

Heterotypic
Eucommia ulmoides var. yunnanensis H.Lév., Cat. Pl. Yun-Nan: 174 (1916).

Distribution
Native distribution areas:

Continental: Asie
Regional: China
China North-Central; China South-Central; China Southeast

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
References
Primary references

Oliver, D., 1891. Hooker's Icon. Pl. 20: t. 1950.

Additional references

Call, V.B. & Dilcher, D.L. 1997. The fossil record of Eucommia (Eucommiaceae) in North America. American Journal of Botany 84(6): 798–814. DOI: 10.2307/2445816 PDF JSTOR Reference page.

Links

Hassler, M. 2020. Eucommia ulmoides. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2020. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: 2020 Jun 03. Reference page.
International Plant Names Index. 2020. Eucommia ulmoides. Published online. Accessed: Jun 03 2020.
Govaerts, R. et al. 2020. Eucommia ulmoides in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Jun 03. Reference page.
Tropicos.org 2020. Eucommia ulmoides. Missouri Botanical Garden. Published online. Accessed: 03 Jun 2020.

Vernacular names
suomi: Rohtoparkkipuu

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

Description

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.
Taxonomy

E. 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.
Distribution

This tree 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, indicating that the genus had a much wider range in the past.[3]
Uses
Eucommia ulmoides pastilles, known as dùzhòngwán (Chinese: 杜仲丸)

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 elasticity, lower thermoplastic temperature, etc.
Chemistry

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

Chinese herbology 50 fundamental herbs

References
Wikimedia Commons has media related to Eucommia ulmoides.
Wikispecies has information related to Eucommia ulmoides.

Rivers, M.C. (2018). "Eucommia ulmoides". IUCN Red List of Threatened Species. 2018: e.T31280A130694949. doi:10.2305/IUCN.UK.2018-2.RLTS.T31280A130694949.en. Retrieved 19 November 2021.
"IPNI Plant name details Eucommia ulmoides". Archived from the original on 4 March 2016. Retrieved 9 September 2013.

Call, V. B.; Dilcher, D. L. (1997). "The fossil record of Eucommia (Eucommiaceae) in North America". American Journal of Botany. 84 (6): 798–814. doi:10.2307/2445816. JSTOR 2445816. PMID 21708632.

HUEC Nutrition & Obesity (including Eucommia bark results) online (ppt)