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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 ...
Taxus is a genus of coniferous trees or shrubs known as yews in the family Taxaceae. [1] Yews occur around the globe in temperate zones of the northern hemisphere, northernmost in Norway and southernmost in the South Celebes. Some populations exist in tropical highlands. [2] The oldest known fossil species are from the Early Cretaceous. [3]
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 ...
Trunk of the Florence Court Yew. The Florence Court Yew is the surviving specimen of the two original Irish yew (Taxus baccata 'Fastigiata') seedlings. As such, it is the oldest Irish yew alive and it is believed that almost all Irish yews worldwide descend from this specimen. [1]
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]
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]
The yew grows on a tumulus in the south-east end of the churchyard of St. John the Baptist. [1] Yews are capable of living for several thousands of years; [2] the Ashbrittle Yew itself is believed to be over 3,000 years old, but defining its precise age is difficult due to its hollow centre. [3]