Styphnolobium japonicum

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Japanese pagoda tree
Sophora japonica JPG2Aa.jpg
habit
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S. japonicum
Binomial name
Styphnolobium japonicum
Synonyms

Styphnolobium japonicum (L.) Schott, the Japanese pagoda tree[3] (Chinese scholar tree, pagoda tree; syn. Sophora japonica) is a species of tree in the subfamily Faboideae of the pea family Fabaceae.

It was formerly included within a broader interpretation of the genus Sophora. The species of Styphnolobium differ from Sophora in lacking the ability to form symbioses with rhizobia (nitrogen fixing bacteria) on their roots. It also differs from the related genus Calia (mescalbeans) in having deciduous leaves and flowers in axillary, not terminal, racemes. The leaves are alternate, pinnate, with 9–21 leaflets, and the flowers in pendulous racemes similar to those of the Black locust.

Distribution[edit]

foliage and inflorescence
close-up of flowers

Styphnolobium japonicum is native to China; despite the name, it was introduced in Japan. It is a popular ornamental tree in Europe, North America and South Africa, grown for its white flowers, borne in late summer after most other flowering trees have long finished flowering. It grows into a lofty tree 10–20 m tall with an equal spread, and produces a fine, dark brown timber.

Uses[edit]

Gardening[edit]

The Guilty Chinese Scholartree was a historic pagoda tree in Beijing, from which the last emperor of the Ming dynasty, Chongzhen, hanged himself.

Traditional medicine[edit]

the beans

S. japonicum (Chinese: ; pinyin: huái; formerly Sophora japonica) is one of the 50 fundamental herbs used in traditional Chinese medicine.

Tea[edit]

The flowers and leaves are sometimes used for teas, such as by families in Laoshan Village, Shandong Province, China. It counts as a variety of herbal tea.

Construction uses[edit]

Used to make the strong, springy curved "enju wood" handle used on the traditional Japanese woodworking adze, called the chouna.[4][5]

Chemistry[edit]

The dried flower buds may contain as much as 20% rutin with some quercetin.[6] S. japonicum dried fruit contain the flavonoid glycosides sophoricoside, genistin and rutin and the flavonoid aglycones genistein, quercetin and kaempferol.[7] Another analysis found genistein and genistein glycosides including sophorabioside, sophoricoside, genistein-7-diglucoside, genistein-7-diglucorhamnoside, and kaempferol and the kaempferol glycosides kaempferol-3-sophoroside and kaempferol-3-rhamnodiglucoside.[6] The fruit also contain the alkaloids cytisine, N-methylcytisine, sophocarpine, matrine and stizolamine.[8]

References[edit]

Footnotes[edit]

  1. ^ "Styphnolobium japonicum". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 2008-02-19.
  2. ^ a b c d "Styphnolobium japonicum – ILDIS LegumeWeb". Retrieved 2008-02-19.
  3. ^ "Styphnolobium japonicum". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 4 December 2015.
  4. ^ "Japanese axes and adzes". Robin Wood. Retrieved 2012-02-24.
  5. ^ "Beautiful axes, Japanese carpentry tools".
  6. ^ a b Tang, Weici; Eisenbrand, Gerhard (1992). Sophora Japonica L. Berlin, Heidelberg: Springer. pp. 945–955. doi:10.1007/978-3-642-73739-8_114. ISBN 978-3-642-73741-1.
  7. ^ Chang, L.; Zhang, X.X.; Ren, Y.P.; Cao, L.; Zhi, X.R.; Zhang, L.T. (2013). "Simultaneous Quantification of Six Major Flavonoids From Fructus sophorae by LC-ESI-MS/MS and Statistical Analysis". Indian Journal of Pharmaceutical Sciences. 75 (3): 330–338. doi:10.4103/0250-474X.117437. PMC 3783751. PMID 24082349.
  8. ^ Bensky, Dan; Clavey, Steven; Stöger, Erich; Lai Bensky, Lilian (2015). Chinese Herbal Medicine: Materia Medica (Portable 3rd ed.). Seattle, USA: Eastland Press. pp. 575–578. ISBN 978-0-939616-82-4.

General references[edit]

  • The relationship of Sophora sect. Edwardsia (Fabaceae) to Sophora tomentosa, the type species of the genus Sophora, observed from DNA sequence data and morphological characters. Bot. J. Linn. Soc. 146: 439–446 (2004). Available online.

External links[edit]