Botanical atlas

Pacific Yew

Taxus brevifolia

Long before it entered modern medicine, Pacific yew was treasured by Pacific Northwest peoples, including the Coast Salish, Haida, and Nuu-chah-nulth, for its remarkably dense, springy wood, which was carved into bows, paddles, digging sticks, and tool handles that could outlast almost anything else the forest offered. The tree grew slowly in the shadowed understory of old-growth stands, and a single good bow-stave might represent years of careful selection and seasoning. In the twentieth century, the tree's quiet reputation changed entirely when researchers discovered that compounds in its bark showed powerful activity against cancer cells, a discovery that eventually gave the world the chemotherapy drug paclitaxel. That history is a reminder that this is a tree to admire and study, not one to prepare at home.

Safety.

Pacific yew is genuinely dangerous: its needles, bark, wood, and seeds all contain taxine alkaloids that can cause fatal heart arrhythmias in humans, dogs, horses, and livestock, sometimes after only a small ingested amount, and poisoning can occur with little warning before collapse. The soft red aril surrounding the seed is the one part birds eat, but the seed itself inside is toxic if chewed or crushed, so no part of this tree should ever be eaten, brewed, or prepared at home. The chemotherapy drug derived from yew compounds is produced only through controlled pharmaceutical processes under medical supervision, never through home preparation. Keep children, pets, and grazing animals away from yew clippings and fallen needles, and always consult a qualified healthcare professional or physician for anything related to yew-derived medicines or suspected exposure.