Artemisia longifolia is North American species in the daisy family, known by the common name long-leaved sage or longleaf wormwood. It is native to western Canada (Manitoba, Saskatchewan, Alberta, British Columbia) and the north-central United States (Montana, the Dakotas, Minnesota, Wyoming, and Colorado with a few isolated populations in Oklahoma).Biota of North America Program 2014 county distribution map
Artemisia longifolia is a perennial up to 80 cm (32 inches) tall, usually not forming clumps. Leaves are longer and narrower than for most related species, up to 12 cm (5 inches) long. The species grows in barren areas, in grasslands, and in alkaline flats in the high plains.Flora of North America, Long-leaved sage, Artemisia longifolia It is completely deciduous unlike many related species in Artemisia.
Cultivation Considered a handsome plant by gardeners such as the author Claude A. Barr for its foliage and also for the very pleasant scent of its foliage when brushed against or crushed. It is relatively well behaved in the garden, not seeding as freely as some other Artemisia species and only being somewhat rhizomatous.
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