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Montana Field Guide

Montana Field Guides

Annual Wormwood - Artemisia annua

Exotic Species (not native to Montana)

Global Rank: GNR
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 1

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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 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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat

References
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Citation for data on this website:
Annual Wormwood — Artemisia annua.  Montana Field Guide.  .  Retrieved on , from