Wormwood (Artemisia absinthium) is a herbaceous perennial plant, with a hard, woody rhizome. The stems are straight, growing to 0.8-1.2 m (rarely 1.5 m) tall, grooved, branched, and silvery-green. The leaves are spirally arranged, greenish-grey above and white below, covered with silky silvery-white hairs, and bearing minute oil-producing glands. Its flowers are pale yellow, tubular, and clustered in spherical bent-down heads (capitula), which are in turn clustered in leafy and branched panicles. Flowering is from early summer to early autumn.
It grows naturally on uncultivated, arid ground, on rocky slopes, and at the edge of footpaths and fields.