Salix cupularis

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

Salix cupularis is a small shrub from the genus of the willow ( Salix ) with 1.5 to 2.7 centimeters long leaf blades . The natural range of the species is in China.

description

Salix cupularis is a small shrub. The twigs are initially reddish brown or black-purple and later gray and have clearly developed nodes . The buds are brown-red, shiny, narrowly elongated and about 4 millimeters long. The leaves have rounded, about 5 millimeters long stipules . The petiole is yellowish, and about a third to a half times as long as the leaf blade. The leaf blade is elliptical or obovate-elliptical, rarely rounded, 1.5 to 2.7 inches long and 1 to 1.5 inches wide, entire, with a rounded or wide wedge-shaped base and a more or less rounded and acuminate or long pointed end. The upper side of the leaf is dull green and bare, the underside greenish. Six to nine pairs of side veins are formed.

As male inflorescences about 2 centimeters long are kittens formed. The peduncle is short and has three leaflets. The bracts are obovate, about half as long as the stamens, hairy down or hairless on the underside of the leaf towards the tip. They have a rounded tip. Male flowers have adaxially and abaxially narrowly ovate-petiolate nectar glands connected at the base . Two stamens are formed. The stamens are hairy down at the base. Female kittens are elliptical to short cylindrical, about 1 inch long and petiolate. The bracts are ovate to broadly ovate, 1.5 to 2 millimeters long and have a rounded tip. Female flowers have an adaxial and a somewhat smaller abaxial nectar gland. The adaxial gland is divided into two or three parts, the base of the gland is fused and thus resembles a disc . The ovary is long ovate, hairless and short stalks. The stylus is about 1 millimeter long, the stigma has two columns. The capsule fruits are about 3 millimeters long when ripe. Salix cupularis blooms in June when the leaves shoot or a little later, the fruits ripen in July and August.

Occurrence

The natural range is in the northwest of the Chinese province of Gansu , in Qinghai , Shaanxi , Sichuan and in Inner Mongolia . Salix cupularis grows on mountain slopes at altitudes of 2500 to 4000 meters.

Systematics

Salix cupularis is a kind from the kind of willow ( Salix ), in the family of the pasture plants (Salicaceae). There it is assigned to the Sclerophyllae section . It was first described scientifically in 1923 by Alfred Rehder in the Journal of the Arnold Arboretum . No synonyms are known. The generic name Salix comes from Latin and was already used by the Romans for various types of willow.

There are two varieties :

  • Salix cupularis var. Cupularis : the tip of the leaf is more or less rounded and pointed, male catkins are about 1 centimeter long. The distribution area is in the Chinese provinces of Gansu, Qinghai, Shaanxi, Sichuan on mountain slopes at altitudes of 2500 to 4000 meters.
  • Salix cupularis var. Acutifolia S. Q. Zhou : The leaf tip is long, pointed, male catkins are up to 2 centimeters long. The distribution area is in Inner Mongolia in the Helan Mountains at an altitude of about 3200 meters.

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. 218, 220, 221 (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 cupularis , in the Flora of China , Volume 4, p. 220
  2. ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix Sect. Sclerophyllae , in the Flora of China , Volume 4, p. 218
  3. ^ Salix cupularis . In: The International Plant Name Index. Retrieved January 2, 2014 .
  4. ^ Salix cupularis . In: The Plant List. Retrieved January 2, 2014 .
  5. ↑ Exactly: Etymological Dictionary of Botanical Plant Names , p. 552
  6. ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix cupularis . Var cupularis , in the Flora of China , Volume 4, page 221
  7. ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix cupularis var. Acutifolia , in the Flora of China , Volume 4, p. 221

Web links

  • Salix crenata at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed January 2, 2014.