Salix bikouensis

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Salix bikouensis
Systematics
Rosids
Eurosiden I
Order : Malpighiales (Malpighiales)
Family : Willow family (Salicaceae)
Genre : Willows ( Salix )
Type : Salix bikouensis
Scientific name
Salix bikouensis
YLChou

Salix bikouensis is a shrub or small tree in the genus of willow ( Salix ) with brown or dark chestnut-colored branches and 3.5 to 6 centimeters long leaf blades. The natural range of the species is in China.

description

Salix bikouensis is a shrub or tree up to 5 meters high . The twigs are brown or dark chestnut colored, initially hairy and later balding. The leaves have a 2 to 3 millimeter long stem. The leaf blade is lanceolate, rarely lanceolate, 3.5 to 6 centimeters long and 1.4 to 1.6 centimeters wide, short pointed or pointed, with a rounded-wedge-shaped base and a glandular sawn leaf edge. The Leaves are green, the underside pale, both sides are bare or along the midrib fine, initially hairy daunig.

The male inflorescences are narrow, cylindrical, 2 to 2.2 centimeters long and 4 to 5 millimeters in diameter catkins . The inflorescence stalk is 4 to 5 millimeters long, densely down-haired with two or three leaves with a lanceolate or reverse lanceolate leaf blade. The bracts are brownish, long ovate, about 0.8 millimeters long, hairy on the upper side almost bald or sparsely long, underneath and long covered with yellow hair on the edge. The male flowers have two nectar glands , the adaxial is wider than the abaxial. The two stamens have 2.4 to 2.5 millimeters long, finely haired stamens that have grown together at the base. The female catkins are 1.6 to 2 centimeters long with a diameter of about 4 millimeters and a 7 to 9 millimeter long, densely down-haired stalk with 3 or 4 obovate-lanceolate leaves. The bracts are brown, egg-shaped with a rounded tip, yellow on both sides and covered with long hair. The female flowers have an adaxial, broad, lobed or entire nectar gland . A small, abaxial gland may be present. The ovary is cylindrical-oval, 2 to 2.2 millimeters in length, bald or somewhat down-haired and almost seated. The stylus is short, the scar tetralobal. Salix bikouensis flowers before or with the leaf shoots in April, the fruits ripen from April to May.

Occurrence

The natural range is in the Chinese provinces of Gansu , Hubei and Shaanxi close to bodies of water or along rivers at an altitude of 700 to 900 meters.

Systematics

Salix bikouensis is a kind from the kind of willow ( Salix ), in the family of the pasture plants (Salicaceae). There it is assigned to the Salix section . It was first scientifically described in 1981 by Chou Yi Liang . The generic name Salix comes from Latin and was already used by the Romans for various types of willow.

There are two varieties :

  • Salix bikouensis var. Bikouensis with a bald ovary . The distribution area is in Gansu, Hubei and Shaanxi.
  • Salix bikouensis var. Villosa Y. L. Chou with slightly drooping branches and partially down- haired ovaries . The distribution area is in Hubei.

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. 181, 187 (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 d Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix bikouensis , in the Flora of China , Volume 4, p. 187
  2. ↑ a b Salix bikouensis . In: Germplasm Resources Information Network (GRIN). United States Department of Agriculture, accessed September 9, 2012 .
  3. ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix Sect. Salix , in the Flora of China , Volume 4, p. 181
  4. ↑ Exactly: Etymological Dictionary of Botanical Plant Names , p. 552
  5. ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix bikouensis var. Bikouensis , in the Flora of China , Volume 4, p. 187
  6. ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix bikouensis var. Villosa , in the Flora of China , Volume 4, page 187

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