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The Llangernyw Yew (pronounced [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]
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 ...
T. baccata appears throughout Europe and into western Asia. [2] T. cuspidata occurs over much of East Asia, in China, Japan, Korea, and Sakhalin. [13] Taxus brevifolia ranges in the United States from California to Montana and Alaska, [12] while Taxus canadensis appears in the northeastern United States and southeast Canada. [2]
Previous recognition of two distinct families, Taxaceae and Cephalotaxaceae (e.g., [12]), was based on relatively minor morphological details: Taxaceae (excluding Cephalotaxus) has smaller mature seeds growing to 5–8 millimetres (0.20–0.31 in) in 6–8 months, that are not fully enclosed by the aril; in contrast, Cephalotaxus seeds have a ...
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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]
[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: Fortingall, Perthshire: United Kingdom: Alive. Possibly the oldest tree in Britain. [38] [39] [clarification needed] Alishan Sacred Tree: 3,000: Formosan cypress Chamaecyparis formosensis: Alishan National Scenic Area, Chiayi: Taiwan: Collapsed on July 1, 1997, following heavy rainstorms. [40] Patriarca da Floresta 3,020 ...