Artemisia annua
Artemisia packardiae
annual wormwood, armoise annuelle, sweet annie, sweet sagewort
Packard's artemisia, Packard's wormwood, Succor Creek mugwort
mostly 1, erect, green, turning to reddish brown with age, simple (smooth or ribbed), glabrous or sparsely hairy.
3–20, erect, light brown, simple or branched, glabrous.
cauline, bright green;
blades triangular to broadly ovate, 2–5(–10) × 2–4 cm, 2–3-pinnatifid (lobes relatively narrow, ± toothed), faces glabrous, gland-dotted.
cauline, dark green;
blades lanceolate, 1.5–5 × 1–2.5 cm, 2-pinnatifid (primary lobes 5–9, 0.4–1.5 cm; cauline smaller, pinnatifid to entire), faces tomentose (abaxial) or glabrous (adaxial).
globose, 1.5–2.5 × 1.5–2.5 mm.
campanulate to hemispheric, 2.5–3.5 × 2–4.5 mm.
pistillate (0–)10–20;
bisexual 18–24;
corollas pale yellow (broadly campanulate), 0.5–1 mm, glabrous.
pistillate 3–8;
bisexual, sometimes functionally staminate, (15–)20–35;
corollas bright yellow, 1.3–2.2 mm, glandular.
(green) lanceolate, glabrous.
broadly ovate, glandular (at least at bases).
(nodding, peduncles 2–5 mm) in open, (diffusely branched, leafy) arrays 15–30(–40) × 10–20 cm.
(peduncles 0 or to 3 mm) in usually paniculiform, sometimes racemiform, arrays 5–20 × 1.5–4 cm.
oblong (flattened), 0.3–0.8 mm, glabrous.
(light brown) ellipsoid (± arcuate, ribs 4, prominent), ca. 1 mm, glandular.
= 18.
= 18.
Artemisia annua
Artemisia packardiae
Widely cultivated for aromatic oils, Artemisia annua often persists in gardens, becoming naturalized in moist-temperate areas (especially in eastern United States). Reports of naturalization may be exaggerated (reported for Prince Edward Island, but not established).
The systematic placement of this species appears to align most closely with species of the Eurasian subg. Seriphidium (L. E. Watson et al. 2002). Molecular evidence suggests that the Artemisia annua lineage may be ancestral to woody species in the Old World.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Artemisia packardiae is known only from southeastern Oregon, western Idaho, and northeastern Nevada. It is closely related to A. michauxiana and could be considered an ecologic variant.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
- Local floras:
BC, 
CA, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
Go Botany, 
IL Wildflowers, 
KS Wildflowers, 
LA Plants, 
MD Biodiversity, 
MI Flora, 
PNW Herbaria 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
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- Wikipedia
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OR
