Upright, aromatic herbaceous plant with numerous flower heads clustered close to the upper part of the main stem. The flower heads are discoid, with 6-45 yellowish disk flowers, depending on the variety. Leaves are entire to deeply parted or divided. Plants are somewhat silvery haired. Flowers from July into October.
Western wormwood is a wildflower that may be found in dry open places.
Western wormwood is found mostly east of the Cascades and Sierra Nevada, but is otherwise common in the western United States.
In the Columbia River Gorge, Artemisia ludoviciana is found at an elevation of 0'-400' throughout much of the gorge, from the Sandy River in the west on east.