River ash

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River ash
Systematics
Asterids
Euasterids I
Order : Mint family (Lamiales)
Family : Olive family (Oleaceae)
Genre : Ash trees ( Fraxinus )
Type : River ash
Scientific name
Fraxinus sogdiana
Bunge

The flux-ash ( Fraxinus sogdiana ) is a deciduous tree art from the genus of the ash in the family Oleaceae . Their natural range is in Central Asia.

description

The river ash is a tree with an egg-shaped crown that reaches a height of up to 25 meters, in cultivation usually only up to 10 meters. The branches are round, olive to gray-brown and bare. The terminal buds are small, brown and longer than wide. The leaves are about three to branch ends. They are 10 to 25 centimeters long, composed and consist of seven to eleven, rarely up to 13 long-stalked leaflets . The leaflets are 2.5 to 8 inches long and 1.5 to 4 inches wide, almost circular to narrow-lanceolate, pointed with a broad wedge-shaped base. The upper half of the leaf margin is irregularly sharp. The upper side of the leaf is deep green and bare, the underside is only slightly hairy on the nerves of young leaves. 10 to 14 pairs of nerves are formed. The petiole is 4 to 5 inches long. The flowers are polygamous and are in lateral clusters . Petals are missing. The flowers appear before the leaves from April to May. The fruits are 3 to 3.5 centimeters long, flat winged nuts , the wing of which runs down to the middle.

Distribution and ecology

The distribution area of ​​the river ash is in Central Asia in Kazakhstan , Kyrgyzstan , Tajikistan , Uzbekistan and in the Chinese Xinjiang . There it thrives in floodplain and riparian woodland and open forests on moderately dry to fresh, slightly acidic to strongly alkaline, sandy, gravelly or loamy, nutrient-rich soils in sunny locations. It tolerates heat but is only moderately frost hardy . They can be found at heights of around 500 meters.

The flow-ash is in the red list of the IUCN out as Near Threatened ( "Near Threatened").

Systematics

The flux-ash ( Fraxinus sogdiana ) is a kind of the genus of the ash ( Fraxinus ) in the family Oleaceae (Oleaceae). It is assigned to the Fraxinus section . A synonym of the species is Fraxinus potamophila Herder .

proof

literature

  • Andreas Roloff , Andreas Bärtels: Flora of the woods. Purpose, properties and use. With a winter key from Bernd Schulz. 3rd, corrected edition. Eugen Ulmer, Stuttgart (Hohenheim) 2008, ISBN 978-3-8001-5614-6 , pp. 311-312.

Individual evidence

  1. ↑ a b Roloff et al .: Flora of the Woods , pp. 311–312
  2. ↑ a b c Fraxinus sogdiana. In: Flora of China Vol. 15. www.eFloras.org, p. 279 , accessed on December 29, 2010 (English).
  3. ↑ Fraxinus sogdiana in the endangered Red List species the IUCN 2010. Posted by: Participants of the FFI / IUCN SSC Central Asian regional tree Red Listing workshop, 2007. Retrieved on January 2 2011th
  4. ^ Fraxinus sogdiana. In: Germplasm Resources Information Network (GRIN). United States Department of Agriculture, accessed December 29, 2010 .