Pterocarya

Caucasian wingnut ( Pterocarya fraxinifolia ), leafy branch

The wing nuts ( Pterocarya ) are a genus of flowering plants in the family of the walnut family ( Juglandaceae ). The genus includes six species of deciduous trees that are native to Asia.

Description

The wing nuts are deciduous, strong growing trees. They have constant change, large to very large, feathery leaves. There are five to 21, rarely up to 25 leaflets per leaf present. The leaf edges are serrated. Stipules absent.

Wing nuts are monoecious getrenntgeschlechtig ( monoecious ), so put male and female flowers on the same copy. The male flowers are in depending on the type short or very long catkins. The male flowers have five to 18 stamens. The female flowers are borne singly or grouped standing depending on the type of short to very long catkins. The style is short and ends in a bilobed scar.

The fruits are double-leaf.

Dissemination

The Pterocarya species are native to Asia; they are found in China, the Caucasus and northern Iran where they are found between an altitude between 0-500 meters.

System

The number of species of the genus Pterocarya has changed by demarcation problems again and again. Currently the genus are associated with six types:

  • Caucasian wingnut ( Pterocarya fraxinifolia ( Lam.) Spach ): syn: Juglans fraxinifolia Lam, Pterocarya caucasica CAMey, Pterocarya pterocarpa ( Michx. ) Kunth. .: Pterocarya fraxinifolia var dumosa ( Lavallée ) CKSchneid.
  • Pterocarya macroptera var delavayi ( Franchet ) WEManning
  • Pterocarya macroptera var insignis ( Rehder & EHWilson ) WEManning ( Syn: Pterocarya insignis Rehder & EHWilson )
  • Pterocarya macroptera Batalin var macroptera

There are also hybrids

  • Pterocarya × rehderiana CKSchneid. Hybrid between P. and P. fraxinifolia stenoptera.

The following way that was previously eingeordntet here is currently assigned to a different genus:

  • Pterocarya paliurus Batalin: Is now Cyclocarya paliurus ( Batalin ) Iljinsk.

Use

The wood of the Caucasian wingnut is one of the most valuable wood veneers (" Caucasian walnut " ) for furniture production.

Swell

  • Alan Mitchell, translated by Gerd Krüssmann: The forest and park trees in Europe. Paul Parey, Hamburg and Berlin, 1975, ISBN 3-490-05918-2.
  • Anmin Lu, Donald E. Stone & LJ Grauke: Juglandaceae in Flora of China, Volume 4: Description of the genus and identification key of the Chinese species. (English)
Rosids Fagales Broad-leaved tree
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