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'''Taxus brevifolia <ref name="Taxus brevifolia" />, the Pacific yew or western yew, ''' is a conifer native to the Pacific Northwest of North America. It ranges from southernmost Alaska south to central California, mostly in the Pacific Coast Ranges, but with isolated disjunct populations in southeast British Columbia (most notably occurring on Zuckerberg Island near Castlegar) and in north to central Idaho.

== Characteristics Parts Used=={{Parts Used|Fruits}}, {{Parts Used|Seeds}}.

==Chemical Composition==The Pacific yew is a small to medium-sized evergreen treepoisonous because it contains at least 11 alkaloids, growing 10–15 m tall and with a trunk up to 50 cm diameterknown collectively as taxines. The structure of only two of the alkaloid constituents is known: taxine A, rarely more. In some instanceswhich accounts for 30%, trees with heights in excess of 20 m occur in parks and other protected areastaxine B, quite often in gullieswhich accounts for 2%. The tree Paclitaxel (Figure 128-1) is extremely slow growing, and has a habit pseudoalkaloid but not a constituent of rotting from the inside, creating hollow forms. This makes it difficult taxine because its nitrogen is acylated with benzoic acid and sometimes impossible to make accurate rings counts to determine a specimen's true age. Often damaged by succession of the forest, it usually ends up in a squat, multiple leader form.has no basic principle<ref name="chemical composition"/>

The seed cones are highly modified==Properties==Reference: Dravya - Substance, each cone containing a single seed 4–7 mm long partly surrounded by a modified scale which develops into a softRasa - Taste, bright red berryGuna -like structure called an arilQualities, 8–15 mm long and wide and open at the end. The arils are mature 6–9 months after pollination. The seeds contained in the arils are eaten by thrushes and other birdsVeerya - Potency, which disperse the hard seeds undamaged in their droppings; maturation of the arils is spread over 2–3 monthsVipaka - Post-digesion effect, increasing the chances of successful seed dispersal. The male cones are globoseKarma - Pharmacological activity, 3–6 mm diameter, and shed their pollen in early spring. It is mostly dioecious, but occasional individuals can be variably monoecious, or change sex with timePrabhava - Therepeutics.===Dravya===

== Uses Habit=={{Habit|Herb}}

Traditionally==Identification=====Leaf==={{Leaf|Simple|Alternate|Evergreen needles, the wood was used by Native Americans to make bows and paddles for canoessingle, in addition many other items from daily life. The Japanese have also used the wood for decorative purposes.spirally arranged}}<ref name="Leaf"/>

Members ===Flower==={{Flower|Unisexual|2-4cm long|Yellow|5-20|Species is dioecious; male flowers are small, round, and yellow and are borne on the undersides of the Pit River Tribe would sell this plant to the Ukiah.leaves}}

The Concow tribe calls the tree yōl’===Fruit==={{Fruit|round|1/4 inch long|clearly grooved lengthwise, Lowest hooked hairs aligned towards crown|fleshy, orange-kō (Konkow language).red|hard seed}}

== Medicinal uses Where to get the saplings====Mode of Propagation=={{Propagation|Seeds}}, {{Propagation|Cuttings}}.

The chemotherapy drug paclitaxel (taxol), used ==How to plant/cultivate==Thrives in breastalmost any soil, ovarian, and lung cancer treatmentacid or alkaline, as long as it is derived from Taxus brevifolia. As it was already becoming scarce when its chemotherapeutic potential was realized, the Pacific yew was never commercially harvested from its habitat at a large scale; the widespread use of the paclitaxel (taxol) was enabled when a semiwell-synthetic pathway was developed from extracts of cultivated yews of other species. Unlicensed pharmaceutical production use of closely related wild yew species in India and China may be threatening some of those species.drained<ref name="How to plant/cultivate"/>

==Common nameCommonly seen growing in areas=={{Commonly seen|Banks of mountain streams}}, {{Commonly seen|Deep gorges and ravines}}, {{Commonly seen|Borders of forests and fields}}.

Taxus brevifolia (Pacific yew) - Flickr - brewbooks (1).jpg Taxus brevifolia (Pacific yew) - Flickr - brewbooks (2).jpg  Pacific yew.jpg  PacificYew 7591.jpg</gallery> == References == <references><ref name="Taxus chemical composition">[https://clinicalgate.com/taxus-brevifolia-pacific-yew/ "Chemical constituents"]</ref> <ref name="Leaf">[http://rht777dendro.wixsitecnre.comvt.edu/dendrology/syllabus/factsheet.cfm?ID=259 "plant decsription"]</ref> <ref name="How to plant/cultivate">[https://www.pfaf.org/22777user/medicinal-plants-iv Plant.aspx?LatinName=Taxus+brevifolia "wixsiteCultivation details"]</ref>