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Taxine can be found in Taxus species: Taxus cuspidata, T. baccata (English yew), Taxus x media, Taxus canadensis, Taxus floridana, and Taxus brevifolia (Pacific or western yew). All of these species contain taxine in every part of the plant except in the aril , [ citation needed ] the fleshy covering of the seeds (berries).
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 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.
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]
It is an evergreen tree or large shrub growing to 10–18 m tall, with a trunk up to 60 cm diameter. The leaves are lanceolate, flat, dark green, 1–3 cm long and 2–3 mm broad, arranged spirally on the stem, but with the leaf bases twisted to align the leaves in two flattish rows either side of the stem except on erect leading shoots where the spiral arrangement is more obvious.
Taxus × media, also referred to as the Hybrid yew, Anglo-Japanese yew, or Anglojap yew is a conifer (more specifically, a yew) created by the hybridization of English yew Taxus baccata and Japanese yew Taxus cuspidata. [1] [2] This hybridization is thought to have been performed by the Massachusetts-based horticulturalist T.D. Hatfield in the ...
Cephalotaxus species produce cephalotaxine, an alkaloid.Parry et al 1980 provides evidence that cephalotaxine is a phenylethylisoquinoline.However, they also find this genus to be unable to incorporate cinnamic acid into cephalotaxine, and incorporation of cinnamic acid is usually a step in phenylethylisoquinoline syntheses, throwing the phenylethylisoquinoline theory in to question.