Salix etosia
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Salix etosia is a species in the genus of willow ( Salix ) and grows as a shrub or tree . The leaf blades have a length of 4 to 6.5 centimeters. The natural range of the species is in China.
description
Salix etosia grows as a shrub or tree. The branches are brown or rust-brown. Young twigs are strong, densely downy-haired or tomentose and later bald. The buds are dirty brown, egg-shaped and finely hairy. The leaves have a 5 to 7 millimeter long, downy-haired or felty stem. The leaf blade is elliptical or oblong-elliptical, 4 to 6.5 inches long and 1.8 to 2.5 inches wide. The leaf margin is entire, the leaf base pointed or wedge-shaped-rounded, the leaf end pointed. The upper side of the leaf is green, the underside greenish to slightly whitish, downy-haired along the central vein, shaggy hairy in young leaves and later balding. 10 to 15 lateral wire pairs are formed per leaf.
The male inflorescences are cylindrical, 3 to 3.5 centimeters long and 8 to 10 millimeters in diameter, yellowish green or at the tip brown catkins . The peduncle is 5 to 10 millimeters long and has two to four small leaves about 1 centimeter long. The bracts are egg-shaped or oblong-egg-shaped, about 2 millimeters long, shaggy hairy or almost bare on the upper side. Male flowers have an adaxial nectar gland . Two stamens are formed with separate or partially fused, bare stamens up to 5 millimeters long. The anthers are yellow. The female kittens are 4 to 6 centimeters long with a diameter of 6 to 8 millimeters. The bracts resemble those of the male kitten. Female flowers have an elongated, adaxial nectar gland. The ovary is stalked, ovate-cylindrical to conical, 2 to 3.5 millimeters in length, bald or upper surface slightly hairy. The stylus is inconspicuous. The scar is egg-shaped and sometimes divided. The fruits are 6 to 7 millimeter long capsules . Salix etosia flowers before or with the leaf shoots in March and April, the fruits ripen in May.
Distribution and ecology
The natural range is in the Chinese province of Guizhou , in the west of Hubei and in Sichuan . There it grows on river banks at heights of 1300 to 2000 meters.
Systematics
Salix etosia is a species from the genus of willows ( Salix ) in the willow family (Salicaceae). There it is assigned to the Denticulatae section . It was first scientifically described in 1916 by Camillo Karl Schneider in Plantae Wilsonianae . A synonym of the species is Salix camusii H. Lév.
The young leaves and the male catkins are similar to those of the species Salix wallichiana , but the male catkins are slightly longer, the female catkins are thinner when they flower and the ovary is glabrous.
Individual evidence
- ↑ a b c d e Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix etosia In: Flora of China. Volume 4, p. 206.
- ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix Sect. Denticulatae In: Flora of China. Volume 4, p. 195.
- ^ Salix etosia . In: The International Plant Name Index. Accessed March 24, 2015 .
- ^ Salix etosia . In: The Plant List. Retrieved March 24, 2015 .
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. 195, 206 (English).
Web links
- Salix etosia at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed March 24, 2015.