Silky-haired willow
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Silky-haired willow ( Salix glauca ) |
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The silky-haired willow , also Arctic gray willow ( Salix glauca ) is a species of willow ( Salix ). It is circumpolar in the northern hemisphere .
description
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Vegetative characteristics
In sheltered locations, the silky-haired willow forms bushes with heights of up to 3 meters. They are mostly found as a dwarf shrub that grows along the ground and only reaches a height of 10 centimeters.
The simple leaves have a smooth edge and are elongated-ovoid to ovate with a length of 4 to 6 centimeters. The thickness of their hair ( indument ) varies.
Generative characteristics
The kitten-shaped inflorescences are yellowish to yellowish-brown. The capsule fruits are densely hairy.
Chromosome set
The basic chromosome number in the genus Salix is x = 19; Different degrees of ploidy (e.g. tetraploidy and hexaploidy) with chromosome numbers of 2n = 76, 96, 114 or 152 were determined in Salix glauca .
Location
The silky-haired willow grows mainly in dwarf shrub heaths , on herbaceous, species-rich tundra , in snow valleys and along watercourses. The subsoil usually consists of sand, alluvial sand or stones.
Systematics and distribution
The silky-haired willow is circumpolar in the northern hemisphere with a few subspecies and varieties:
- Salix glauca L. subsp. glauca : It is native to Northern Europe and the tundra regions of Russia .
- Salix glauca subsp. callicarpaea (Trautv.) Böcher : It occurs in North America, Iceland and Greenland .
Two to four varieties are said to be found on the American northwest coast:
- Salix glauca var. Acutifolia (Hook.) CKSchneid.
- Salix glauca var. Villosa Andersson .
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Individual evidence
- ↑ Bruno P. Kremer, Bärbel Oftring : Steinbach's natural guide. Discover and recognize trees & bushes. Eugen Ulmer, Stuttgart 2010, ISBN 978-3-8001-5934-5 , p. 166.
- ^ Arne Anderberg: The virtuella floran. Ripsvide, Salix glauca Naturhistoriska riksmuseet, Stockholm 1996. (Swedish).
- ↑ Benny Génsbøl: A nature and wildlife guide to Greenland. Gyldendahl Publ., Copenhagen 2004, ISBN 87-02-02965-0 .
- ^ Salix glauca at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ VV Petrovsky, PG Zhukova: Chromosome numbers, morphology, ecology and taxonomy of willows of the Northeast of Asia. In: Botanicheskii Zhurnal Volume 68, Issue 1, 1983, pp. 29-38.
- ^ TW Böcher, K. Holmen, K. Jakobsen: Grønlands Flora. 2nd ed., P. Haase & Søns, Copenhagen 1966.
- ↑ a b SG Aiken, MJ Dallwitz, LL Consaul, CL McJannet, RL Boles, GW Argus, JM Gillett, PJ Scott, R. Elven, MC LeBlanc, LJ Gillespie, AK Brysting, H. Solstad, JG Harris: Salix glauca L . subsp. callicarpaea (Trautv.) Böcher and Salix glauca subsp. stipulifera (Flod. ex Hayren) Hiitonen In: Flora of the Canadian Arctic Archipelago. Descriptions, Illustrations, Identification, and Information Retrieval. Version: May 2011. (Eng.)
Web links
- Distribution in the northern hemisphere according to: Eric Hultén , Magnus Fries: Atlas of North European vascular plants , 1986, ISBN 3-87429-263-0 .
