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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 .
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).
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 ...
They are many-branched, small trees and shrubs.The leaves are evergreen, spirally arranged, often twisted at the base to appear 2-ranked.They are linear to lanceolate, and have pale green or white stomatal bands on the undersides.
Taxus brevifolia: Pacific yew Taxaceae (yew family) Taxus canadensis: Canada yew; American yew Taxaceae (yew family) Taxus chinensis: Chinese yew Taxaceae (yew family) Taxus cuspidata: Japanese yew Taxaceae (yew family) Taxus floridana: Florida yew Taxaceae (yew family) Taxus globosa: Mexican yew Taxaceae (yew family) Taxus × media: hybrid yew ...
It is most prominently given to any of various coniferous trees and shrubs in the genus Taxus: European yew or common yew (Taxus baccata) Pacific yew or western yew (Taxus brevifolia) Canadian yew (Taxus canadensis) Chinese yew (Taxus chinensis) Japanese yew (Taxus cuspidata) Florida yew (Taxus floridana) Mexican yew (Taxus globosa)
The anticancer drug taxol was developed after screening of the Pacific yew, Taxus brevifolia (foliage and fruit shown) in 1971. Further information: Drug discovery The pharmaceutical industry has roots in the apothecary shops of Europe in the 1800s, where pharmacists provided local traditional medicines to customers, which included extracts ...
Gelatin capsules, informally called gel caps or gelcaps, are composed of gelatin manufactured from the collagen of animal skin or bone. [4] Vegetable capsules, introduced in 1989, [5] are made from cellulose, a structural component in plants. The main ingredient of vegetarian capsules is hydroxypropyl methyl cellulose. In the 21st century ...