Salix bistyla

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Salix bistyla
Systematics
Rosids
Eurosiden I
Order : Malpighiales (Malpighiales)
Family : Willow family (Salicaceae)
Genre : Willows ( Salix )
Type : Salix bistyla
Scientific name
Salix bistyla
Hand.-Mazz.

Salix bistyla is a shrub from the genus of willow ( Salix ) with initially shaggy branches and about 7 centimeters long leaf blades. The natural range of the species is in Nepal and China.

description

Salix bistyla is a shrub with initially shaggy hairy branches that later become bald. The buds are bare. The leaves have an approximately 5 millimeter long, tomentose-haired stem. The stipules are also about 5 millimeters long, have a glandular serrated leaf margin and a felty hairy underside. The leaf blade is narrowly elliptical, or narrowly obovate-elliptical, about 7 inches long and 2.5 inches wide, with a pointed or blunt tip, a wedge-shaped base and a glandular serrated leaf margin. The upper side of the leaf is hairy shaggy along the veins, the underside is densely hairy gray-tomentose. 10 to rarely 12 pairs of nerves are formed.

The inflorescences grow at the ends of the branches. They are densely flowered and are 4 to 6 centimeters long with a diameter of 1 to 1.5 centimeters. The inflorescence axis is hairy tomentose. The bracts are obovate-fan-shaped, about 5 millimeters long, with a clipped tip and indistinctly serrated edge. Male flowers have two nectar glands . The two stamens are separated from each other, the stamens are completely down-haired. Female inflorescences are thick and when the fruit is ripe up to 16 centimeters long with a diameter of 2 centimeters. Female flowers have an adaxial nectar gland about 1 millimeter in diameter , a small abaxial gland may be present. The ovary is narrow egg-shaped, sitting and densely tomentose, white hairy. The stylus is 4 to 5 millimeters long, tomentose at the base, completely divided and set apart. The scar is entire or bilobed. As fruits ovoid, up to 9 millimeters long, matted hairy, sedentary are capsules made with erhaltendem stylus. Salix bistyla flowers when the leaves shoot in June and July, the fruits ripen from August to September.

Occurrence

The natural range is in Nepal, in the northwest of the Chinese province of Yunnan and in the east of Tibet . There it grows in the mountains at heights of 2600 to 3400 meters.

Systematics

Salix bistyla is a species from the genus of willows ( Salix ) in the willow family (Salicaceae). There it is assigned to the Psilostigmatae section . It was first scientifically described by Heinrich von Handel-Mazzetti in 1929 . The generic name Salix comes from Latin and was already used by the Romans for various types of willow.

proof

literature

  • Wu Zheng-yi, Peter H. Raven (Ed.): Flora of China . Volume 4: Cycadaceae through Fagaceae . Science Press / Missouri Botanical Garden Press, Beijing / St. Louis 1999, ISBN 0-915279-70-3 , pp. 226, 233 (English).
  • Helmut Genaust: Etymological dictionary of botanical plant names. 3rd, completely revised and expanded edition. Nikol, Hamburg 2005, ISBN 3-937872-16-7 , p. 552 (reprint from 1996).

Individual evidence

  1. ↑ a b c Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix bistyla , in the Flora of China , Volume 4, p. 233
  2. ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix Sect. Psilostigmatae , in the Flora of China , Volume 4, p. 181
  3. ↑ Salix bistyla . In: Germplasm Resources Information Network (GRIN). United States Department of Agriculture, accessed September 9, 2012 .
  4. ↑ Exactly: Etymological Dictionary of Botanical Plant Names , p. 552

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