Pointed-leaved cotoneaster
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Pointed-leaved cotoneaster ( Cotoneaster acuminatus ) |
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The Cotoneaster acuminatus ( Cotoneaster acuminatus ) is a species in the genus of cotoneaster ( Cotoneaster ) within the family of Rosaceae (Rosaceae). It comes from the Himalayas .
description
Appearance and leaf
The pointed-leaved cotoneaster grows as an upright, deciduous shrub that reaches heights of 2 to 3 meters, rarely up to 4 meters. The stalk-round twigs have a grayish-brown to brownish bark that is initially dense yellowish, bristly haired, later bald .
The alternate leaves arranged on the branches are divided into a petiole and a leaf blade. The shaggy hairy petiole is 3 to 5 mm long. The simple leaf blade is 2 to 6.5 cm long and 2 to 3 cm wide, elliptical-ovate to ovate-lanceolate with a broad, wedge-shaped blade base and mostly pointed to rarely pointed upper end. Both leaf surfaces are shaggy hairy, but the underside of the leaf is denser. The mm with a length 3-5 lanceolate and shaggy hairy stipules partly fall off during fruit ripening.
Inflorescence and flower
The flowering time is between May and June, depending on the location. The 1 to 2 cm long zymous inflorescence usually contains only two or three (one to five) flowers. The rhachis inflorescence and the 3 to 5 mm long pedicels are hairy yellowish shaggy. With a length of 2 to 4 mm, the lanceolate or linear bracts have a shaggy hairy edge.
The fragrant, hermaphrodite flowers are radial symmetry and five-fold with a double flower envelope . The bell-shaped flower cup (hypanthium) is pressed on the outside with shaggy hair. The five sepals are triangular with a length of 1.5 to 2.5 mm and a width of 2 to 3 mm with a pointed upper end. The corolla has a diameter of about 6 to 8 mm. The five bare, free petals are 3 to 4 mm long and almost the same width ovate to obovate and keeled with a blunt to serrated upper end. The color of the petals is pink to whitish. The twenty stamens are shorter than the petals. The two free carpels are softly haired in the upper area and each contain about two erect ovules . The two free styles do not protrude beyond the stamens.
Fruit and seeds
The apple-shaped fruits are ellipsoidal with a length of 8 to 10 mm and a diameter of 7 to 8 mm. Between September and October the fruits ripen and turn bright red. In one fruit there are two parchment-like housings ( follicles ). There are five, fleshy, curved sepals on the fruit. There are a few to a few flattened, hard seeds in a fruit.
Chromosome number
The number of chromosomes is 2n = 34 or 68.
Occurrence
The pointed-leaved cotoneaster comes from the Himalayas . It is native to northern India , Bhutan , Sikkim , Nepal and the Chinese provinces of Sichuan , Xizang and Yunnan . In China it thrives in mixed forests, bushes and in fields at altitudes between 1300 and 3000 meters and in Nepal at altitudes between 2500 and 3700 meters.
Taxonomy
The first publication of Cotoneaster acuminatus was made in 1821 by John Lindley in Transactions of the Linnean Society of London , 13 (1), p 101, Table 9, written "acuminata" there. Synonyms for Cotoneaster acuminatus Lindl. are: Cotoneaster bakeri G.Klotz , Cotoneaster kongboensis G.Klotz , Cotoneaster mucronatus Franch. , Cotoneaster nepalensis André , Mespilus acuminatus Lodd. The specific epithet acuminatus means pointed, this refers to the shape of the leaves.
Use and site conditions in culture
The pointed-leaved cotoneaster is used as an ornamental wood .
The pointed-leaved cotoneaster grows best in light (sandy), medium (loamy) and heavy soils , best when they are well- drained . The pH of the soil hardly plays a role in this species. Cotoneaster acuminatus can also thrive in nutrient-poor, very alkaline soils. It thrives in sunny and partially shaded locations, but not in shade. The pointed-leaved cotoneaster is tolerant of air pollution.
A pink dye can be obtained from the fruits. The wood is very hard and tight and grained evenly. Since the branches are too small, only smaller workpieces are made with them. The branches are used to build bridges in the Himalayas.
Nothing is known about its use as a food or medicine.
swell
- Lu Lingdi, Anthony R. Brach: Cotoneaster Cotoneaster acuminatus. P. 98 -Online , In: Wu Zheng-yi, Peter H. Raven (Ed.): Flora of China , Volume 9: Pittosporaceae through Connaraceae. Science Press and Missouri Botanical Garden Press, Beijing and Saint Louis 2003, ISBN 1-930723-14-8 . (Section Description and Distribution)
Individual evidence
- ↑ First publication scanned at biodiversitylibrary.org .
- ^ Cotoneaster acuminatus at Tropicos.org. Missouri Botanical Garden, St. Louis
- ↑ a b c d Entry in Plants for A Future .
