Artemisia ludoviciana is a North American species of flowering plant in the daisy family Asteraceae, known by several common names, including silver wormwood, western mugwort, Louisiana wormwood, white sagebrush, lobed cud-weed, prairie sage, and gray sagewort.

Each small head is a cup of hairy phyllaries surrounding a center of yellowish disc florets and is about 0.5 cm wide.

[6] The plant is native to North America where it is widespread across most of the United States, Canada, and Mexico.

[1][2][7][8] Some botanists suggest that eastern United States populations have been introduced from the western and central part of the continent.

[6] The following subspecies are recognised:[10] Indigenous tribes across the continent use the species as a medicinal plant, a source of fiber for crafting household items, and for ceremonial purposes.