Common Wormwood - Artemisia absinthium
Absinthe Wormwood, Absinthium, Wormwood Sage
Taprooted perennial. Stems erect, often branched, 40–80 cm. Herbage canescent. Leaves basal and cauline, petiolate; blades ovate, 2–10 cm long, 2 to 3 times pinnately divided into linear-lanceolate segments, reduced and less divided upward. Inflorescence leafy-paniculate; heads nodding. Involucre hemispheric, 2–3 mm high; phyllaries green, tomentose; receptacle villous. Disk flowers perfect and female, 40 to 70, glabrous to glandular; corolla 1–1.5 mm long. Achenes glabrous, ca. 1 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Among Artemisia, A. absinthium can be identified by the pistillate marginal flowers and perfect, fertile central flowers, a receptacle with long, woolly hairs, a coarse stem, and pinnately dissected leaves with oblong to linear-oblong leaf segments (Britton and Brown 1913, Fernald 1950).
Artemisia absinthium may be found from Newfoundland to Manitoba, as far north as Hudson's Bay, and south to Nova Scotia, New England, Pennsylvania, and New Jersey (Britton and Brown 1913, Fernald 1950). In the Midwest, it can be found in Ohio, Indiana, Wisconsin, and Minnesota (Fernald 1950). In the Great Plains, it is found in North Dakota, South Dakota, Montana, and the Prairie Provinces of Canada (Britton and Brown 1913, Fernald 1950, Molberg 1976, Wrage and Kinch 1973, Mitich 1975, Schroeder 1979). It is also known to occur in Nebraska and Kansas (McGregor et al. 1977).
Absinth sage is a native of Eurasia, the Middle East, and North Africa (Wrage and Kinch 1973, Mitich 1975). It was introduced to North America in the early part of the 19th century to be cultivated for medicinal and social uses (Mitich 1975), and was first reported outside cultivated gardens in 1841, along roadsides and on waste ground (Torrey and Gray 1841, Mitich 1975).
Observations in Montana Natural Heritage Program Database
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- Additional ReferencesLegend: View Online Publication
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- Eggers, M.J.S. 2005. Riparian vegetation of the Montana Yellowstone and cattle grazing impacts thereon. M.Sc. Thesis. Montana State University, Bozeman, MT. 125 p.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.