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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]
The catkin like male cones are 2–5 millimetres (0.079–0.197 in) long, and shed pollen in the early spring. They are sometimes externally only slightly differentiated from the branches. They are sometimes externally only slightly differentiated from the branches.
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 ...
Epicormic albino leaf growth on the smaller Defynnog Yew. This yew tree or trees stands in the churchyard of St Cynog's Church.It is very hard to accurately determine the age of yew trees [7] [8] and a nearby café and gift shop holds a certificate of 2002 from the Yew Tree Campaign, signed by David Bellamy, which states that "according to all the data we have to hand" the tree is dated to ...
The Pacific yew (Taxus brevifolia), native to the Pacific Northwest of North America, and the Canada yew (Taxus canadensis) of Eastern and Central North America were the initial sources of paclitaxel or Taxol, a chemotherapeutic drug used in breast and lung cancer treatment and, more recently, in the production of the Taxus drug eluting stent ...
One trunk of the Fortingall Yew. The tree's once massive trunk (52 ft or 16 m in girth when it was first recorded in writing, in 1769 [5]) with a former head of unknown original height, is split into several separate stems, giving the impression of several smaller trees, with loss of the heartwood rings that would establish its true age. [6]
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NVC community W13 (Taxus baccata woodland), also known as Yew woodland, is one of the woodland communities in the British National Vegetation Classification system; it is the only Yew woodland community in the NVC. This is a very localised community. There are two subcommunities: