Juglans mandshurica

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Juglans mandshurica
Juglans mandshurica Walnut JPG.jpg

Juglans mandshurica

Systematics
Rosids
Eurosiden I
Order : Beech-like (Fagales)
Family : Walnut family (Juglandaceae)
Genre : Walnuts ( juglans )
Type : Juglans mandshurica
Scientific name
Juglans mandshurica
Maxim.

Juglans mandshurica is an East Asian tree from the walnut family(Juglandaceae).

Avenue in front of the coach house at Cīrava Castle in Latvia
Bark of a tree in front of the coach house at Cīrava Castle in Latvia
Nuts from a tree in front of the coach house at Cīrava Castle in Latvia
Nutshell from a tree in front of the coach house at Cīrava Castle in Latvia

features

Juglans mandshurica grows as a tree, sometimes as a shrub, and reaches a height of 25 m. The leaves are 40 to 90 cm long, the petiole 5 to 23 cm. The petiole and rachis are hairy to slightly glandular, sometimes dense. The leaf is pinnate in pairs with 9 to 19 leaflets . The lateral ones are seated, have an elliptical to elongated elliptical or oval-elliptical to long elliptical-lanceolate leaf shape , are 6 to 17 cm long and 2 to 7.5 cm wide. The underside is densely hairy, but glandless and balding. Glandular hairs are located at most along the midrib. The leaf base is asymmetrical, slightly heart-shaped, the leaf margin is serrated, the end pointed. The terminal leaflet is stalked 1 to 5 cm long.

The male ear is 9 to 40 cm long. Each flower has 12 to 40 stamens . Flowering time is April and May.

The fruiting ear bears 4 to 5 nuts. These are spherical, egg-shaped or ellipsoidal, 3 to 7.5 cm long and 3 to 5 cm wide. The cover is densely hairy and does not open. The nutshell is thick, rough, has 6 to 8 distinct ribs and deep holes and indentations. Fruit ripening is August to October.

The number of chromosomes is 2n = 32.

distribution

Juglans mandshurica is native to China north of the Huang He and North Korea. It grows in mixed forests on mountain slopes and in valleys at 500 to 2800 m above sea level. The species was first described in the middle of the 19th century. Georg Kuphaldt introduced the species to the parks of the Russian Empire. The tree is also hardy in Central Europe.

Systematics

Juglans mandshurica is within the genus Juglans in the section Cardiocaryon provided. Often, such as in the Flora of China , as a synonym of Juglans mandshurica Asked Juglans cathayensis is to be regarded as a separate species by molecular genetic studies.

supporting documents

  • Anmin Lu, Donald E. Stone & LJ Grauke: Juglandaceae , in: Flora of China , Volume 4, 1999, pp. 277-285. Science Press, Beijing and Missouri Botanical Garden Press, St. Louis. (pdf, 153 kB)

Individual evidence

  1. ^ Juglans mandshurica at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
  2. ↑ Hemma Kanstein: The parks of Georg Kuphaldts in Riga. An example of historical open space design. Verlag Nordostdeutsches Kulturwerk / Technische Universität Berlin, 1998 ISBN 3-9322-6712-5 / 3-7983-1779-8
  3. ↑ Alice M. Stanford, Rachel Harden, Clifford R. Parks: Phylogeny and biogeography of Juglans (Juglandaceae) based on matK and ITS sequence data . American Journal of Botany, Volume 87, 2000, pp. 872-882.

Web links

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