Artemisia vulgaris
Artemisia tilesii
armoise vulgaire, common mugwort, common wormwood, felon-herb, green-ginger, lobed wormwood, mugwort
Aleutian mugwort, Cascade wormwood, Tilesius' wormwood
relatively numerous, erect, brownish to reddish brown, simple proximally, branched distally (angularly ribbed), sparsely hairy or glabrous.
1–3, erect, white, tomentose (on distal branches, hairs appressed) or glabrate.
basal (petiolate) and cauline (sessile), uniformly green or bicolor;
blades broadly lanceolate, ovate, or linear, (2–)3–10(–12) × 1.8–8 cm (proximal reduced and entire, distal pinnately dissected, lobes to 20 mm wide), faces pubescent or glabrescent (abaxial) or glabrous (adaxial).
basal and cauline, bicolor (white and green);
blades (basal) linear to broadly lanceolate, 3–7(–10) × 2–5(–6) cm, coarsely pinnately lobed (cauline becoming linear distally), faces tomentose (abaxial) or glabrous (adaxial).
ovoid to campanulate, 2–3(–4) mm.
broadly campanulate, 4–5 × 3.5–4 mm.
pistillate 7–10;
bisexual (5–)8–20;
corollas yellowish to reddish brown, 1.5–3 mm, glabrous (style branches arched-curved, truncate, ciliate).
pistillate 9;
bisexual 25–60;
corollas yellow, 1.5–3 mm, glabrous (style branches included, erect, linear, relatively short, short-ciliate).
lanceolate, hairy or glabrescent.
(violet-brown) oval (outer) to elliptic or lanceolate, sparsely tomentose.
in compact, paniculiform or racemiform arrays (10–)20–30(–40) × (5–)7–15(–20) cm.
in compact to broadly branched, paniculiform arrays 1–20 × 2–6 cm.
ellipsoid, 0.5–1(–1.2) mm, glabrous, sometimes resinous.
oblong-linear (angular), 1.2–1.5 mm, glabrous.
= 18, 36, 40, 54.
= 18, 36.
Artemisia vulgaris
Artemisia tilesii
Grown as a medicinal plant, most commonly as a vermifuge, Artemisia vulgaris is widely established in eastern North America and is often weedy in disturbed sites. Populational differences in morphologic forms are reflected in size of flowering heads, degree of dissection of leaves, and overall color of plants (from pale to dark green), suggesting multiple introductions that may date back to the first visits by Europeans. It is tempting to recognize the different forms as subspecies and varieties; the array of variation in the field is bewildering. If genetically distinct forms exist in native populations, the differences appear to have been blurred by introgression among the various introductions in North America. A case could be made for recognizing var. kamtschatica in Alaska based on its larger heads and shorter growth form; apparent introgression with populations that extend across Canada confounds that taxonomic segregation.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Artemisia tilesii has a bewildering array of variation in leaf and inflorescence morphology that has been separated into four infraspecific taxa recognized in some floras. I am unable to separate these taxa consistently and am including them within a broad circumscription of the species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
- Local floras:
BC, 
OR, 
WA - Local Web sites:
Flora NW, 
Go Botany, 
IL Wildflowers, 
KS Wildflowers, 
LA Plants, 
MD Biodiversity, 
MI Flora, 
MN Wildflowers, 
MO Plants, 
PNW Herbaria 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
- Local floras: BC, OR, WA
- Local Web sites: Flora NW, PNW Herbaria
- WildflowerSearch
- iNaturalist (observations)
- USDA Plants Database
- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
