Toxicodendron vernicifluum

Lacquer tree ( Rhus verniciflua )

The lacquer tree or Lacksumach ( Rhus verniciflua ) is a flowering plant in the family Anacardiaceae ( Anacardiaceae ). The home are forests on hills and mountains at altitudes 800-2800 m in India, Japan, Korea and the Chinese provinces of Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hebei, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Liaoning, Shaanxi, Shandong, Shanxi, Sichuan, Xizang, Yunnan, Zhejiang. Its juice has been used for about three thousand years for the production of Chinese lacquer, the lacquer art of other Asian countries is used in crafts for the production of Chinese lacquer products, Japanese lacquer products ( Urushi ) and.

Description

The Lacksumach grows as a deciduous tree and reaches stature heights of up to 20 meters. The bark of the branches is yellowish - brown gehaart. The change-constant leaves are 15-30 cm long and imparipinnate with 9 to 13 leaflets against permanent. The petiole is 7 to 14 cm long. Petiole, rachis and leaflets are hairy fluffy. The 4-7 mm long stalked leaflets are 6-13 cm long, 3-6 cm wide, membranous to papery, with smooth edge and 10 to 15 prominent on both leaf surfaces lateral nerves. Stipules absent.

The pendent, branched, Rispige inflorescence is hairy grayish - yellow fluffy. The 1-3 mm long flower stems are shorter and more robust in the female flowers. The functionally unisexual flowers are fünfzählig. The egg-shaped calyx lobes are about 0.8 mm and hairless. The approximately 2.5 mm long and 1.2 mm wide petals are yellowish- green with a brown feather -shaped drawing. The stamens are about 2.5 mm long, the stamens are about equal in length to the dust bag. The disc has five lobes. The smooth, round, upper continuous, einfächerige ovary contains only one ovule. There are three pen available.

The hanging fruit stand contains symmetrical stone fruits that are 5-6 × 7-8 mm in size and smooth. The epicarp is thin, the mesocarp thick, waxy brown with longitudinal resin ducts and the endocarp is 3 × 5 mm in size.

Use

His resin shines and protects the wood to which it is applied before the wood worm and moisture.

The paint is drawn in the summer of those paint trees, which are about ten years old. Before horizontal incisions in the trunk are made alternating groups left and right. However, the juice is highly toxic due to the urushiols contained therein, it causes strong sensitisers, rashes and blisters. Who is working on the trees, must wear protective clothing. By tapping dies from the tree, but at the root soon form new shoots.

Its medical effects have been investigated.

Synonyms

Synonyms are Rhus vernicifera DC., Toxicodendron vernicifluum ( Stokes ) FABarkley, Rhus succedanea var himalaica JDHooker, R. succedanea var silvestrii Pampanini, Toxicodendron verniciferum ( DC.) FABarkley and T. vernicifluum var shaanxiense JZZhang & ZY Shang.

Pictures

Swell

• Tianlu Min & Anders Barfod: Anacardiaceae in the Flora of China, Volume 11, p 351: Toxicodendron vernicifluum - Online.