Salix alfredii

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Salix alfredii
Systematics
Rosids
Eurosiden I
Order : Malpighiales (Malpighiales)
Family : Willow family (Salicaceae)
Genre : Willows ( Salix )
Type : Salix alfredii
Scientific name
Salix alfredii
Goerz ex Rehder & Kobuski

Salix alfredii is a large shrub or small tree from the genus of willow ( Salix ) with red-brown and shiny young twigs and up to 4.5 centimeters long leaf blades. The natural range of the species is in China.

description

Salix alfredii is a shrub or tree up to 4.5 meters high with reddish brown, thin, bare and shiny branches in the first year. The leaves have a 3 to 5 millimeter long petiole. The leaf blade is 2.5 to 4, rarely 4.5 inches long, 1.5 to 2, rarely 2.5 inches wide, ovate-elliptical or elliptical, pointed, entire, with a rounded leaf base. The upper leaf surface is green, the bottom green or gray-blue, fluffy initially and along the midrib villous hairy, later glabrous.

Male inflorescences are 4 to 6 inches long with a diameter of 1 to 1.5 inches. The bracts are about 1.5 millimeters long, obovate and finely hairy. Male flowers have two stamens with about 4.3 millimeters long stamens and yellow, spherical anthers. One, rarely two adaxial nectar glands and sometimes a small, abaxial nectar gland are formed.

Female inflorescences are 2.5 to 4 inches long with a diameter of 4 to 5 millimeters. The peduncle is short or absent, leaflets are obsolete or absent. The bracts are about 1 millimeter long, obovate, almost bare on the upper side, shaggy hairy underneath and long ciliate. Female flowers have an adaxial nectar gland. The ovary is about 2.2 millimeters long, ovoid, villous hairy or bald and short stalks. The style is short, the stigma four-lobed. The fruits are about 3 millimeters in size, finely hairy capsules with a conspicuous stalk. Salix alfredii flowers from May to June, the fruits ripen in July.

Occurrence and location requirements

The natural range is on mountain slopes in the Chinese provinces of Gansu , Qinghai and Shaanxi .

Systematics

Salix alfredii is a kind from the kind of willow ( Salix ), in the family of the pasture plants (Salicaceae). There it is assigned to the section Heterochromae . It was described scientifically valid for the first time in 1932 by Alfred Rehder and Clarence Emmeren Kobuski . The generic name Salix comes from Latin and was already used by the Romans for various types of willow.

There are two varieties :

  • Salix alfredii var. Alfredii with shaggy hairy ovaries
  • Salix alfredii var. Fengxianica (N. Chao) G. Zhu with bald ovary

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. 239 (English).
  • 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

  1. ↑ a b c d e f Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix alfredii , in the Flora of China , Volume 4, p. 239
  2. ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix Sect. Glaucae , in the Flora of China , Volume 4, p. 241
  3. ↑ Exactly: Etymological Dictionary of Botanical Plant Names , p. 552

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