Quercus Lond. & Pharm. Edinb. Quercus cum longis pediculis C. B. Quercus Robur Linn. Oak: a large tree, with oblong leaves, widening from the bottom to the extremity, and sinu-ated or bluntly indented about the edges: the fruit is an acorn, or kernel with a coriaceous covering, inclosed at bottom in a scaly cup. It is a common forest tree in most parts of Europe.

The bark of the oak is a strong astringent, accompanied with a moderate bitterness, but no remarkable smell or particular flavour: with solution of chalybeate vitriol it strikes an inky blackness. It is said to have been employed with success, not only for restraining haemor-rhagies, and other immoderate evacuations, but likewise in intermitting fevers and in gleet-ing gangrenous wounds and ulcers; in which cases, an extract made from it is said by some to be equal to that of the Peruvian bark. A decoction of it used as a fomentation is said to have cured a procidentia rectif(a). It gives out its virtue both to water and rectified spirit.