Magnolia sieboldii

Magnolia sieboldii, or Siebold's magnolia, also known as Korean mountain magnolia<ref>Template:Cite book</ref> and Oyama magnolia,<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> is a species of Magnolia native to east Asia in China, Japan, and Korea. It is named after the German doctor Philipp Franz von Siebold (1796–1866).

Description

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{{ safesubst:#invoke:Unsubst||date=__DATE__ |$B= Template:Ambox }} }} Magnolia sieboldii is a large deciduous shrub or small tree Template:Convert tall. The stalks, young leaves, young twigs and young buds are downy. The leaves are elliptical to ovate-oblong, 9–16 cm (rarely 25 cm) long and 4–10 cm (rarely 12 cm) broad, with a 1.5-4.5 cm petiole.

The flowers, unlike the spring flowering magnolias, open primarily in the early summer, but continue intermittently until late summer. They are pendulous, cup-shaped, 7–10 cm diameter, and have 6-12 tepals, the outer three smaller, the rest larger, and pure white; the carpels are greenish and the stamens reddish-purple or greenish-white.

Taxonomy

It was described by Karl Koch in 1853.<ref name = "POWO" />

Subspecies

There are three subspecies:<ref name = "POWO">Magnolia sieboldii K.Koch. (n.d.). Plants of the World Online. Retrieved July 23, 2025, from https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:554840-1</ref>

• Magnolia sieboldii subsp. japonica Template:Au from Japan Low shrub; flowers with 6 tepals and greenish-white stamens.Template:Cn
• Magnolia sieboldii subsp. sieboldii Japan, Korea, eastern China. Tree or large shrub; flowers with 9-12 tepals and reddish-purple stamens; leaves smaller, rarely over 16 cm.Template:Cn
• Magnolia sieboldii subsp. sinensis Template:Au Southwestern China (Sichuan); flowers as subsp. sieboldii; leaves larger, commonly to 22 cm.Template:Cn

• Flower bud
  Flower bud
• Flower, male phase
  Flower, male phase
• Flower
  Flower
• Flower detail
  Flower detail
• Immature fruit
  Immature fruit
• Nearly mature fruit
  Nearly mature fruit

Cultivation

Magnolia sieboldii is grown as an ornamental tree in gardens. It is one of the hardiest magnolias, successful in cultivation as far north as Arboretum Mustila in Finland. The cultivar 'Colossus' has gained the Royal Horticultural Society's Award of Garden Merit.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Called mongnan or mokran (목란/{{#invoke:Lang|lang}}), Siebold's magnolia is the national flower of North Korea.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

References

• Hunt, D. (ed). (1998). Magnolias and their allies. International Dendrology Society and Magnolia Society. Template:ISBN
• Flora of China: Magnoliaceae (draft account)

External links

• Template:Cite book
• Friedman, William (Ned). "Oyama magnolia in full bloom." Posts from the Collections, Arnold Arboretum of Harvard University website, June 12, 2016. Accessed 1 October 2019.
• Magnolia sieboldii images at the Arnold Arboretum of Harvard University Plant Image Database.