Salix daguanensis
| Salix daguanensis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Salix daguanensis | ||||||||||||
| PI Mao & PX He |
Salix daguanensis is a shrub from the genus of the willow ( Salix ) with 4 to 8 centimeters long leaf blades . The natural range of the species is in China.
description
Salix daguanensis is a shrub up to 2 meters high. Young twigs are hairy brown at the tip. The buds are large, long ellipsoid and also hairy brown. The leaves have a 6 to 10 millimeter long petiole. The leaf blade is oblong-lanceolate, 4 to 8 inches long and 1.2 to 2.4 inches wide. The leaf margin is indistinctly serrated, the leaf base is broadly wedge-shaped to more or less rounded. Both leaf sides are initially slightly hairy, and older leaves only have fine hairs on the underside along the midrib. The leaf veins on the underside are protruding. The top of the leaf is green.
The inflorescences are thin, petiolate, 3 to 7 centimeters long and about 4 millimeters in diameter catkins . The peduncle is up to 1.5 millimeters long, but can sometimes be missing. He has two or three leaflets. The inflorescence axis is finely hairy. The bracts are yellow, elongated and have a rounded tip and a white, hairy leaf margin. Male flowers usually have two, rarely only one whole or two-part nectar gland . Usually two rarely three stamens are formed. The stamens are free and have fine white hairs on the underside and about twice as long as the bracts. Female flowers have an adaxial nectar gland. The ovary is ovoid-conical, hairless and sedentary. The stylus is divided into two parts and about 1 millimeter long, the stigma is bilobed. Salix daguanensis flowers only after the leaves have sprout from July to August, the fruits ripen in October.
Occurrence
The natural range is in the Chinese province of Yunnan in the districts of Daguan and Yiliang . Salix daguanensis grows in the mountains at altitudes of 1700 to 2000 meters.
Systematics
Salix daguanensis is a species from the genus of willows ( Salix ) in the willow family (Salicaceae). There it is assigned to the Denticulatae section . It was not scientifically described until 1987 by Mao Pin I and He Pi Xu in the Acta Botanica Yunnanica . Synonyms of the species are not known.
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. 195, 199 (English).
Individual evidence
- ↑ a b c d Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix daguanensis. In: Flora of China. Volume 4, p. 199.
- ↑ Cheng-fu Fang, Shi-dong Zhao, Alexei K. Skvortsov: Salix Sect. Denticulatae. In: Flora of China. Volume 4, p. 195.
- ↑ Salix daguanensis . In: The International Plant Name Index. Retrieved January 2, 2014 .
- ↑ Salix daguanensis . In: The Plant List. Retrieved January 2, 2014 .
Web links
- Salix daguanensis at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed January 2, 2014.