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Montana Field Guide

Montana Field Guides

Annual Wormwood - Artemisia annua
Other Names:  Sweet Annie, Sweet Wormwood, Sweet Sagewort, Annual Mugwort

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Non-native Species

Global Rank: GNR
State Rank: SNA
C-value: 1


Agency Status
USFWS:
USFS:
BLM:


 

External Links

 
General Description
Taprooted annual. Stems erect, simple or branched, 30–80 cm. Herbage glabrous. Leaves cauline, subsessile; blades lanceolate to ovate, 5–15 cm long, 1 to 2 times pinnately divided into linear, sometimes lobed segments. Inflorescence paniculate, leafy-bracteate, with nodding tips. Involucre hemispheric, ca. 1 mm high, wider than high; phyllaries green, glabrous; receptacle glabrous. Disk flowers perfect, 5 to 20, glabrous; corolla ca. 1 mm long; yellow. Achenes glabrous, <1 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced to most of U.S.; native to Eurasia. Collected in Toole and Yellowstone counties more than 70 years ago (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 3

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Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat

Management

References
  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
  • Web Search Engines for Articles on "Annual Wormwood"
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Citation for data on this website:
Annual Wormwood — Artemisia annua.  Montana Field Guide.  .  Retrieved on , from