Wing nuts

This article describes the genus of wing nuts ( Pterocarya ) from the walnut family, for more meanings see wing nut .

Wing nuts
Caucasian wingnut ( Pterocarya fraxinifolia ), leafy branch
Systematics
Nuclear eudicotyledons Rosids Eurosiden I Order : Beech-like (Fagales) Family : Walnut family (Juglandaceae) Genre : Wing nuts
Scientific name
Pterocarya
Kunth

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

description

The wing nuts are deciduous, strong-growing trees . They have alternate, large to very large, pinnate leaves . There are five to 21, rarely to 25 pinna leaflets per leaf present. The leaf margins are serrated. Stipules are missing.

Wingnuts are single sexed ( monoecious ), so set male and female flowers on the same specimen. The male flowers are in short or very long catkins, depending on the species. The male flowers contain five to 18 stamens . Depending on the species, the female flowers stand alone or are grouped on short to very long catkins. The style is short and ends in a two-lobed scar.

The fruits are two-winged wing nuts (Samara).

distribution

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

Japanese wingnut ( Pterocarya rhoifolia )

Chinese wingnut ( Pterocarya stenoptera )

Systematics

The number of species of the genus Pterocarya has changed again and again due to delimitation problems. Six species are currently assigned to the genus:

• Caucasian wingnut ( Pterocarya fraxinifolia (Lam.) Spach ): Syn . : Juglans fraxinifolia Lam. , Pterocarya caucasica C.A.Mey. , Pterocarya pterocarpa (Michx.) Kunth :
  • Pterocarya fraxinifolia var. Dumosa (Lavallee) CKSchneid.
• Pterocarya hupehensis Skan : It occurs in the Chinese provinces of Hubei , Guizhou , Shaanxi and Sichuan .
• Pterocarya macroptera Batalin : It occurs in the Chinese provinces of Gansu , Shaanxi and Sichuan .
  • Pterocarya macroptera var. Delavayi (Franchet) WEManning
  • Pterocarya macroptera var. Insignis (Rehder & EHWilson) WEManning (Syn .: Pterocarya insignis Rehder & EHWilson )
  • Pterocarya macroptera Batalin var. Macroptera
• Japanese wingnut ( Pterocarya rhoifolia Sieb. & Zucc. , Syn .: Pterocarya sorbifolia Sieb. & Zucc. ): It occurs in Japan and in the Chinese province of Shandong .
• Chinese wingnut ( Pterocarya stenoptera C.DC. ): It is found in China, Korea and Taiwan.
• Pterocarya tonkinensis (Franchet) Dode

There are also hybrids

• Pterocarya × rehderiana C.K. Schneid. : Hybrids of Pterocarya fraxinifolia and Pterocarya stenoptera .

The following species, which was previously classified here, is currently assigned to a different genus:

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

use

The wood of the Caucasian wing nut is one of the most valuable types of veneer ("Caucasian walnut") for furniture production .

swell

• Alan Mitchell, translated by Gerd Krüssmann: The forest and park trees of 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 keys of the Chinese species. (English)

Individual evidence

1. ↑ Species list at GRIN Taxonomy for Plants (English)
2. ↑ ^{a b c d} Pterocarya in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved December 30, 2016.

Web links

Commons : Wingnuts  - Collection of images, videos, and audio files

• Thomas Meyer: Data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia )