Annual Wormwood, Sweet Annie, Sweet Sagewort: Artemisia annua -
Biennial Wormwood: Artemisia biennis (Synonym: Artemisia biennis var. biennis) -
Scouler's Wormwood, Northern Wormwood, Pacific Sagewort: Artemisia campestris ssp. pacifica (Synonyms: Artemisia campestris ssp. borealis var. purshii, Artemisia campestris ssp. borealis var. scouleriana, Artemisia campestris var. purshii, Artemisia campestris var. scouleriana) -
Columbia Islands Sagewort, Northern Wormwood, Wormskiold's Wormwood Sagewort: Artemisia campestris var. wormskioldii (Synonyms: Artemisia borealis, Artemisia borealis ssp. borealis, Artemisia campestris ssp. borealis, Artemisia campestris ssp. borealis var. wormskioldii) -
Douglas' Mugwort, Douglas' Sagewort, Douglas' Wormwood, Northwest Mugwort: Artemisia douglasiana (Synonym: Artemisia vulgaris var. douglasiana) -
Dragon Sagewort, Dragon Wormwood, Tarragon: Artemisia dracunculus (Synonyms: Artemisia dracunculus ssp. dracunculus, Artemisia dracunculus var. dracunculus) -
Gray Sagewort, Prairie Sage, Western Mugwort, Western Wormwood: Artemisia ludoviciana ssp. candicans (Synonym: Artemisia ludoviciana var. latiloba) -
Intermediate Sagewort, Prairie Sage, Western Mugwort: Artemisia ludoviciana ssp. incompta (Synonym: Artemisia ludoviciana var. incompta) -
Columbia River Sagewort, Columbia River Wormwood, Riverbank Wormwood: Artemisia ludoviciana ssp. lindleyana (Synonyms: Artemisia lindleyana, Artemisia prescottiana) - Currently lumped into one of the subspecies of Artemisia ludoviciana.
Louisiana Sagewort, Prairie Sage, Silver Wormwood, Western Mugwort, Western Wormwood: Artemisia ludoviciana ssp. ludoviciana (Synonyms: Artemisia ludoviciana var. ludoviciana, Artemisia vulgaris var. ludoviciana)
Lemon Sagewort, Michaux Mugwort, Michaux's Mugwort, Michaux's Wormwood: Artemisia michauxiana (Synonym: Artemisia vulgaris ssp. michauxiana) - This is normally a montane species found above timberline on Mt. Adams and in the upper Klickitat River drainage. Plants have however have been observed on the sand and gravel bars along the Klickitat River as far downstream as Wahkiacus, so it is possible some may be found downstream in the vicinity of Lyle, WA. This is probably the result of seeds and/or plant parts being washed downstream from higher elevations and taking hold at lower elevations.
Coastal Mugwort, Coastal Wormwood, Suksdorf's Sagewort, Suksdorf's Wormwood: Artemisia suksdorfii (Synonym: Artemisia vulgaris var. littoralis) -
Aleutian Mugwort, Cascade Wormwood, Mountain Wormwood, Shining Sagewort: Artemisia tilesii ssp. unalaschensis (Synonyms: Artemisia elatior, Artemisia hookeriana, Artemisia tilesii ssp. elatior, Artemisia tilesii var. elatior, Artemisia tilesii var. unalaschcensis) -
Common Mugwort, Common Wormwood, Lobed Wormwood: Artemisia vulgaris (Synonyms: Artemisia vulgaris var. selengensis, Artemisia vulgaris var. vulgaris) -