Amur willow
| Amur willow | ||||||||||||
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Dragon willow leaves (cultivar Salix udensis 'Sekka') |
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| Scientific name | ||||||||||||
| Salix udensis | ||||||||||||
| Trautv. & CAMey. |
The Amur willow ( Salix udensis ) is a shrub or small tree from the genus of the willow ( Salix ) with up to 15 centimeters long, lanceolate leaf blades that are pointed on both sides. The natural range of the species is in Asia. The species is rarely used, and the 'Sekka' variety is often used as an ornamental shrub.
description
The Amur willow is a shrub or small tree up to 5 meters high with reddish or yellowish-brown, shiny and initially gray-haired shoots. The leaves have small or no stipules at all . The leaf blade is 6 to 15 centimeters long, lanceolate to narrowly lanceolate, pointed at both ends with a slightly bent edge. The upper side of the leaf is glossy green, the underside is bluish green and, on young leaves, has slightly pressed hairs.
2 to 4 centimeters long, cylindrical, mostly sitting catkins are formed as inflorescences . The bracts are lanceolate and covered with long, white hairs on the edge. Male flowers have two stamens . The ovary of female flowers is stalked and hairy. The stylus and the scars are slim. The Amur willow blooms in May. The flowers make an excellent bee pasture .
The number of chromosomes is 2n = 38.
Occurrence and location requirements
The natural distribution area is in Russia in the Sakha Republic , on Kamchatka , in the Khabarovsk region , on the Kuriles , in the Magadan Oblast , in the Primorsky Krai and on Sakhalin ; in China in the provinces of Heilongjiang , Jilin and in the east of Liaoning and in Japan on the islands of Hokkaidō , Honshū and Shikoku . The Amur willow grows in floodplains and on waterfront on moderately dry, fresh to moist, slightly acidic to neutral, sandy soils in sunny locations. The species loves warmth and is usually frost hardy . The distribution area is assigned to winter hardiness zone 5b with mean annual minimum temperatures of −26.0 to −23.4 ° C (−15 to −10 ° F).
Systematics
The Amur willow ( Salix udensis ) is a species from the genus of willows ( Salix ) in the willow family (Salicaceae). It was first scientifically described in 1856 by Ernst Rudolph von Trautvetter and Carl Anton von Meyer . The generic name Salix comes from Latin and was already used by the Romans for various types of willow. A frequently used synonym is Salix sachalinensis Schmidt .
use
The Amur willow is rarely used as an ornamental shrub .
The dragon willow ( variety Salix udensis 'Sekka') is a 3 to 5 meter high, broad shrub with reddish, often flat-banded and up to 5 centimeters wide, twisted or twisted twigs that are densely covered with silvery catkins. There are only male specimens. It is more often planted as an ornamental shrub .
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 , p. 589.
- Helmut Genaust: Etymological dictionary of botanical plant names. 3rd, completely revised and expanded edition. Nikol, Hamburg 2005, ISBN 3-937872-16-7 (reprint from 1996).
Individual evidence
- ↑ a b German name according to Roloff et al .: Flora der Gehölze , p. 589
- ↑ a b c d Roloff et al .: Flora der Gehölze , p. 589
- ^ Salix udensis at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ a b c Salix udensis . In: Germplasm Resources Information Network (GRIN). United States Department of Agriculture, accessed August 15, 2012 .
- ↑ Exactly: Etymological Dictionary of Botanical Plant Names , p. 552
Web links
- Salix udensis. In: The Plant List. Retrieved August 15, 2012 .