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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, or in North America English yew. [6] It is a woodland tree in its native range, and is also grown as an ornamental tree, hedge or topiary.
Taxine alkaloids, which are often named under the collective title of taxines, are the toxic chemicals that can be isolated from the yew tree. [2] [3] The amount of taxine alkaloids depends on the species of yew, with Taxus baccata and Taxus cuspidata containing the most. [4]
Dried yew plant material retains its toxicity for several months and even increases its toxicity as the water is removed, [18] fallen leaves are also toxic. [19] Although poisoning usually occurs when leaves of yew trees are eaten, in at least one case a victim inhaled sawdust from a yew tree. [20]
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.
Taxus canadensis, the Canada yew [2] or Canadian yew, is a conifer native to central and eastern North America, thriving in swampy woods, ravines, riverbanks and on lake shores. Locally called simply as "yew", this species is also referred to as American yew or ground-hemlock. Most of its range is well north of the Ohio River.
Taxaceae (/ t æ k ˈ s eɪ s i. iː,-ˌ aɪ /), commonly called the yew family, is a coniferous family which includes six extant and two extinct genera, and about 30 species of plants, or in older interpretations three genera and 7 to 12 species.
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 ...
Taxus brevifolia, the Pacific yew or western yew, is a species of tree in the yew family Taxaceae native to the Pacific Northwest of North America. It is a small evergreen conifer , thriving in moisture and otherwise tending to take the form of a shrub .