Salix brachista

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Salix brachista
Systematics
Rosids
Eurosiden I
Order : Malpighiales (Malpighiales)
Family : Willow family (Salicaceae)
Genre : Willows ( Salix )
Type : Salix brachista
Scientific name
Salix brachista
CK cutting

Salix brachista is a cushion-forming shrub from the genus of willows ( Salix ) with creeping branches and upright twigs. The leaf blades are from 5 to rarely 20 millimeters long. The natural range of the species is in China.

description

Salix brachista forms cushion-shaped shrubs with a creeping, yellowish-brown trunk and just such main branches. The branches are more or less erect, rust-red and bare. The buds are egg-shaped, small and glabrous. The leaves have a stalk about 9 millimeters long, initially densely hairy. The leaf blade is elliptical, obovate-elliptical or ovate, 5 usually 10 to rarely 20 millimeters long and 4 to 8 millimeters wide, pointed, with a broad wedge-shaped base and slightly serrated towards the tip, toothed to entire leaf margin or almost entire leaf margin. The upper side of the leaf is green and bare, the underside greenish and densely covered with shaggy hairs. The pairs of nerves are protruding on the upper side and sunken on the lower side.

The inflorescences are egg-shaped-spherical, about 1 centimeter long catkins of about 10 flowers with densely shaggy hairy inflorescence axis. The bracts are yellow, obovate, about 1 millimeter long, glabrous, with a clipped, blunt-rounded or serrated tip. The male flowers have two nectar glands , the adaxial is terete and longer than the abaxial. The two stamens are about 3 millimeters long and hairy at the base. The anthers are dull yellow, elliptical and small. Female flowers have petioles, adaxial nectar glands. The ovary is ovoid, hairless or finely hairy and sitting. The stylus is bilobed, the scar ovate and also bilobed. As a fruit about 4 millimeters long, bare are long-ovoid capsules formed. Salix brachista flowers when the leaves shoot in June and July, the fruits ripen from July to August.

Occurrence

The natural range is in the west of the Chinese province of Sichuan , in the west of Yunnan and in the east of Tibet on mountain slopes and in thickets at an altitude of 2600 to 3900 meters.

Systematics

Salix broke ista is a kind from the kind of willow ( Salix ), in the family of the pasture plants (Salicaceae). There she is assigned to the Lindleyanae section . It was first described scientifically in 1916 by Camillo Karl Schneider . The generic name Salix comes from Latin and was already used by the Romans for various types of willow.

There are three varieties :

  • Salix brachista var. Brachista with slightly glandular serrations towards the tip, toothed to entire margins towards the base and a bald ovary.
  • Salix broke ista var. Integra C.Wang & CFFang with consistently ganzrandigem margin. The distribution area is in the west of Yunnan .
  • Salix broke ista var. Pilifera N.Chao with slightly towards glandular sawn to the tip toward the base to ganzrandigem serrated blade edge and fine hairy ovary. The species flowers and fruit in June and July. The distribution area is at an altitude of 3300 to 3500 meters in Tibet.

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. 211, 214 (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 e Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix brachista , in the Flora of China , Volume 4, p. 214
  2. ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix Sect. Lindleyanae , in Flora of China , Volume 4, p. 211
  3. ↑ Exactly: Etymological Dictionary of Botanical Plant Names , p. 552
  4. ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix brachista var. Brachista , in the Flora of China , Volume 4, p. 214
  5. ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix broke ista var. Integra , in the Flora of China , Volume 4, page 214
  6. ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix broke ista . Var pilifera , in the Flora of China , Volume 4, page 214

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