Salix argyrotrichocarpa
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Salix argyrotrichocarpa is a shrub from the genus of willow ( Salix ) with up to 7 centimeters long, wrinkled leaf blades on the top. The natural range of the species is in China.
description
Salix argyrotrichocarpa is a shrub up to 3 meters high with bare, red-brown twigs with a diameter of about 5 millimeters. Young twigs are glabrous or slightly hairy and balding. The leaves are sessile or almost sessile. The leaf blade is 5 to 7 inches long, 2.5 to 3 inches wide, obovate-elliptical, entire, with a pointed, pointed or rounded tip and a wedge-shaped-rounded to rounded leaf base. The upper side of the leaf is wrinkled, initially slightly hairy and later balding except for the leaf veins , the underside is greenish and glabrous.
Nothing is known about the male inflorescences. The female inflorescences are 6 to 7 centimeters long, about 1.3 centimeters in diameter catkins . The peduncle is 1 to 2.5 inches long and leafless. The inflorescence axis is hairy white shaggy. The bracts are obovate-oblong with a rounded tip and dense and long-haired on both sides. Female flowers have an approximately egg-shaped, adaxially located nectar gland . The ovary is three millimeters long, narrow ovate, short stalks and white hairy fluffy. The pen is about half as long as the ovary and bilobed. The scar has two columns. Salix argyrotrichocarpa flowers before or almost as soon as the leaves shoot in July.
Occurrence and location requirements
The natural distribution area is on mountain slopes at an altitude of about 3900 meters in southeast Tibet .
Systematics
Salix argyrotrichocarpa is a species from the genus of willows ( Salix ) in the family of willow plants (Salicaceae). There it is assigned to the Psilostigmatae section . It was first scientifically described by Cheng Fu Fang in 1979 . The generic name Salix comes from Latin and was already used by the Romans for various types of willow.
The species is similar to Salix sikkimensis , but the leaf blade is initially slightly hairy and the leaf margin has no glands. The inflorescence stalk is long, the bracts are not membranous but densely long and hairy with silky hairs with a rounded tip. It also resembles Salix spodiophylla , but it differs in the sedentary or almost sedentary leaves, the more or less bare leaf blade, the leafless inflorescence stalk and the long and silky hair of the bracts.
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. 232, 234 (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
- ↑ a b c d e Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix argyrotrichocarpa , in the Flora of China , Volume 4, p. 232
- ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix Sect. Psilostigmatae , in the Flora of China , Volume 4, p. 234
- ↑ Exactly: Etymological Dictionary of Botanical Plant Names , p. 552
Web links
- Salix argyrotrichocarpa . In:The Plant List. Retrieved August 18, 2012.