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[2] [3] The amount of taxine alkaloids depends on the species of yew, with Taxus baccata and Taxus cuspidata containing the most. [4] The major taxine alkaloids are taxine A and taxine B although there are at least 10 different alkaloids. [5] Until 1956, it was believed that all the taxine alkaloids were one single compound named taxine. [4]
Taxus baccata is a species of evergreen tree in the family Taxaceae, native to Western Europe, Central Europe and Southern Europe, as well as Northwest Africa, northern Iran, and Southwest Asia. [4] It is the tree originally known as yew , though with other related trees becoming known, it may be referred to as common yew , [ 5 ] European yew ...
The Defynnog Yew (Welsh: Ywen Defynnog) (SN9253027960) is one of a group of ancient yews (Taxus baccata) in the churchyard of St Cynog's Church, which serves the parish and the village of Defynnog, Powys, Wales. Defynnog is located close to Sennybridge, about ten miles west of Brecon, within the Brecon Beacons National Park (Bannau Brycheiniog).
Taxus baccata leaves contain approximately 5 mg of taxines per 1g of leaves. [9] The estimated (i.e. not by any means a fact) lethal dose (LD min) of Taxus baccata leaves is 3.0-6.5 mg/kg body weight for humans [16] There is currently no known antidotes for yew poisoning, but drugs such as atropine have been used to treat the symptoms. [17]
The Llangernyw Yew ([ɬanˈɡɛrnɨu] ⓘ) is an ancient yew (Taxus baccata) in the village of Llangernyw, Conwy, Wales. The tree is fragmented and its core part has been lost, leaving several enormous offshoots. The girth of the tree at the ground level is 10.75 m (35.3 ft). [1]
They are many-branched, small trees and shrubs.The leaves are evergreen, spirally arranged, often twisted at the base to appear 2-ranked.They are linear to lanceolate, and have pale green or white stomatal bands on the undersides.
Bermiego Yew, also called in Asturias "Teixu l'Ilesia" is an ancient tree of the species Taxus baccata growing in the village of Bermiego in the Principality of Asturias, northern Spain on the western slope of the Sierra del Aramo. The tree can be found just outside the village within the precincts of the village chapel of Santa Maria de Bermiego.
The Balderschwang Yew (German: Alte Eibe von Balderschwang) is an ancient European yew (Taxus baccata) in Bavaria. It has two hollow trunks and stands alone on a mountain pasture. It is estimated to be between 600 and 1,000 years old, and is possibly the oldest tree in Germany. [1]