Annoying Oregon grape
| Annoying Oregon grape | ||||||||||||
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Annoying Oregon Grape ( Mahonia nervosa ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Mahonia nervosa | ||||||||||||
| ( Pursh ) Nutt. |
The Mahonia nervosa ( Mahonia nervosa ) is a plant from the family of Barberry (Berberidaceae). The original distribution area includes the west of North America from British Columbia in the north, over Washington , Oregon and Idaho to California in the south. The German name of the species refers to the easily recognizable "leaf nerves" ( more correctly leaf veins ).
description
Annoying Mahonia grows as an evergreen shrub that can reach heights of 0.1 to 2 meters. The branches do not form any axial shoots. The hairless bark is brown to yellow-brown in color on two-year-old branches.
The bud consists of 1.3 to 4.4 centimeters long bud scales. The alternate leaves are imparipinnate and consist of 9 to 21 leaflets on a 2 to 11 centimeter long leaf spindle. The simple, thin and more or less flexible leaf blade is lanceolate-ovate to ovate with a length of 2.9 to 8.4 centimeters and a width of 1.2 to 4.8 centimeters. The leaf blade has a rounded to wedge-shaped blade base and a pointed to broad end. Four to six pairs of side veins branch off from the main vein of the leaves. The flat leaf margins have 6 to 13 thorny teeth. The upper side of the leaf is matt blue-green, while the smooth underside of the leaf is matt.
The flowering period extends from March to June. The grape-shaped inflorescences are 6 to 17 centimeters long and consist of 30 to 70 yellow single flowers. The berry fruits are spherical to elongated egg-shaped with a size of 8 to 11 millimeters. When ripe they are colored blue or blue-green.
The number of chromosomes is 2n = 56.
Distribution and occurrence
The natural range of the Annoyed Mahonia is in western North America. It stretches from British Columbia in the north, through Washington , Oregon and Idaho to California in the south. It occurs mainly in open or closed forests that grow on rocky surfaces. They can be found from sea level to altitudes of 1800 meters.
Systematics
It was first described as Berberis nervosa in 1813 by Frederick Traugott Pursh in Flora Americae Septentrionalis; or,. . . 1, pp. 219-220, pl. 5 . Thomas Nuttall transferred the species to the genus Mahonia in The Genera of North American Plants 1, p. 212 in 1818 .
A synonym for Mahonia nervosa (Pursh) Nutt. is Odostemon nervosus (Pursh) Rydb.
use
This species is used as an ornamental shrub in gardens and parks. It is frost hardy. Their fruits can be eaten raw or cooked. A yellow dye can be obtained from the inner bark of the trunks and roots, while a dark green, purple or dark blue-purple dye can be obtained from the fruits.
Preparations obtained from the root have a strengthening and digestive effect and can be used to treat psoriasis , syphilis and bad blood values. A decoction made from the debarked root was previously used to treat arthritis and reddened eyes. The fruits have a laxative effect. As with all Mahonia, the Rhizome of the Nervous Mahonia contains berberine , which has an antibacterial and strengthening effect.
swell
- Alan T. Whittemore: Berberidaceae . Berberis . In: Flora of North America Editorial Committee (Ed.): Flora of North America North of Mexico . Magnoliidae and Hamamelidae. Volume 3. Oxford University Press, New York a. a. 1997, ISBN 0-19-511246-6 , Berberis nervosa , p. 21 (English, Berberis nervos - online - this work is online with the same text).
Individual evidence
- ↑ a b c d e Alan T. Whittemore: Berberidaceae . Berberis . In: Flora of North America Editorial Committee (Ed.): Flora of North America North of Mexico . Magnoliidae and Hamamelidae. Volume 3. Oxford University Press, New York a. a. 1997, ISBN 0-19-511246-6 , Berberis nervosa , p. 21 (English, Berberis nervosa - online - this work is online with the same text).
- ↑ a b Mahonia nervosa at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed January 14, 2012.
- ↑ a b Mahonia nervosa. In: Plants For A Future. www.pfaf.org, accessed on January 14, 2012 (English).
