Annuals, biennials, or perennials (shrubs in A. californica, subshrubs in A. nesiotica); usually fibrous-rooted, sometimes taprooted, caudices sometimes woody, rhizomes sometimes present. Stems usually not wandlike (wandlike in A. californica, A. nesiotica, A. palmeri). Leaves usually deciduous, rarely persistent, basal (rosettes) and/or cauline (not in fascicles). Heads usually disciform (discoid in A. nesiotica and A. palmeri). Receptacles glabrous (paleate in A. palmeri). Florets: usually peripheral 3–20 pistillate and fertile (0 pistillate in A. nesiotica, A. palmeri); central (or all) 14–70 bisexual and fertile; corollas funnelform.

Distribution

Widespread in Northern Hemisphere, especially North America, Europe, and central and northern Asia, sporadic in South America and northern Africa.

Discussion

Species ca. 220 (27 in the flora).

Key

1 Subshrubs or shrubs (stems wandlike) > 2
1 Annuals, biennials, perennials, subshrubs, or shrubs (stems sometimes brittle, not wandlike) > 4
2 Plants 100–350 cm; leaves relatively deeply and coarsely pinnately lobed (lobes 3–7+; coastal California and Baja California) Artemisia palmeri
2 Plants 10–250 cm; leaves pinnately lobed or 3-lobed > 3
3 Shrubs (20–250 cm); leaves pinnately lobed (lobes 0.5–1 mm wide); California (chaparral) Artemisia californica
3 Subshrubs (10–60 cm, stems mostly prostrate); leaves 3-lobed (lobes 1–2 mm wide); Channel Islands, California Artemisia nesiotica
4 Annuals or biennials; leaves among heads (relatively deeply) lobed > 5
4 Perennials, subshrubs, or shrubs; leaves among heads mostly entire > 6
5 Annuals, 30–200(–300) cm, sweetly aromatic; leaves 2–3-pinnatifid; arrays of heads 10–20 cm diam Artemisia annua
5 Annuals or biennials, (10–)30–80(–150) cm, not aromatic; leaves 1–2-pinnately lobed; arrays of heads 2–4 cm diam Artemisia biennis
6 Perennials, subshrubs, or shrubs (not rhizomatous) > 7
6 Perennials (usually rhizomatous, stems sometimes woody at bases) > 15
7 Heads in capitate or dense, corymbiform arrays (plants cespitose) > 8
7 Heads in paniculiform or racemiform arrays (plants not cespitose) > 10
8 Leaves pinnately lobed; involucres 3–5 mm diam.; phyllaries lanceolate to ovate (margins white) Artemisia senjavinensis
8 Leaves 1–2-palmatifid; involucres 3.5–11 mm diam.; phyllaries lanceolate (margins brown or white) > 9
9 Involucres 3.5–6 × 6–11 mm; phyllaries lanceolate (margins brown); corollas yellow or reddish black, glabrous or glandular (not pilose). Artemisia globularia
9 Involucres 3–4 × 3.5–5 mm; phyllaries lanceolate (margins white); corollas yellow, glabrous or pilose Artemisia glomerata
10 Leaves entire, irregularly palmatifid, or palmately 3-lobed to 2-ternately lobed > 11
10 Leaves 2–3-pinnatifid > 13
11 Pappi coroniform; Idaho, Nevada, Oregon Artemisia papposa
11 Pappi 0; Alberta, British Columbia, Northwest Territories, Nunavut; Alaska, Washington > 12
12 Plants 15–70 cm; leaves palmately 3-lobed to 2-ternately lobed. Artemisia alaskana
12 Plants (5–)10–40 cm; leaves 1–3-palmately lobed Artemisia furcata
13 Perennials or subshrubs, 50–170 cm (widely branched, stems brittle); leaf lobes less than 1 mm wide; heads erect; involucres 1.5–3 mm diam. (gardens, waste places, much of North America) Artemisia abrotanum
13 Perennials, 10–50 cm (erect, stems not brittle); leaf lobes 1+ mm wide (margins coarsely toothed); heads nodding; involucres 4–10 mm diam > 14
14 Peduncles 0 or to 10 mm Artemisia laciniata
14 Peduncles to 50 mm Artemisia norvegica
15 Leaves entire, serrate, toothed, or lobed (sinuses to 1/2 blade widths) > 16
15 Leaves (relatively deeply) lobed (sinuses 1/2+ blade widths) > 22
16 Plants 20–50(–80, rarely more) cm > 17
16 Plants 50–300 cm > 19
17 Leaves usually entire, sometimes toothed or lobed; involucres 4–5 mm diam Artemisia longifolia
17 Leaves usually lobed, sometimes entire; involucres (1–)2–5 mm diam > 18
18 Involucres 2–4(–5.5) mm; phyllaries (gray-green) densely tomentose Artemisia ludoviciana
18 Involucres 3.5–4 mm; phyllaries (violet-brown) sparsely tomentose (w North America) Artemisia tilesii
19 Phyllaries glabrous or sparsely hairy (coast, n California to British Columbia) Artemisia suksdorfii
19 Phyllaries usually densely hairy > 20
20 Leaves densely hairy (both faces, broadly lanceolate, mostly entire, the proximal lobed; w North America, mostly inland grasslands). Artemisia douglasiana
20 Leaves (bicolor) hairy abaxially, glabrate or glabrous adaxially > 21
21 Leaves serrate (teeth ca. 2 mm; inland grasslands and barren areas, high plains) Artemisia serrata
21 Leaves mostly deeply lobed (lobes 4–20 mm; mostly e North America, introduced w coast) Artemisia vulgaris
22 Leaves not bicolor (both faces bright green or silvery), lobes acute or rounded > 23
22 Leaves bicolor (abaxial faces silvery, adaxial green), lobes acute > 25
23 Leaves silver-gray, lobes rounded (coastal dunes) Artemisia stelleriana
23 Leaves bright green, lobes acute (not coastal dunes) > 24
24 Involucres (4–)5–8 × 4–10 mm; 0–3800 m Artemisia norvegica
24 Involucres 2.5–3.5 × 2–4.5 mm; 100–2400 m Artemisia packardiae
25 Plants 30–100 cm, lemon-scented; heads usually erect (subalpine and alpine). Artemisia michauxiana
25 Plants 15–70 cm, not lemon-scented; heads usually nodding > 26
26 Perennials (widely spreading, stems brittle); garden escapes, c, e North America. Artemisia pontica
26 Biennials or perennials (erect) > 27
27 Leaves pinnatifid (lobes 3–5, 0.5–1 mm wide); grasslands or deserts, 600– 2900 m Artemisia carruthii
27 Leaves 2–3-pinnately lobed (lobes elliptic, 2–6 mm wide); w mountains, 2200–3100 m Artemisia franserioides
AuthorLeila M. Shultz +
Authorityunknown +
DistributionWidespread in Northern Hemisphere +, especially North America +, Europe +, and central and northern Asia + and sporadic in South America and northern Africa. +
IllustratorLinda Ann Vorobik +
Publication titleSp. Pl. + and Gen. Pl. ed. +
Publication year1753 + and 1754 +
Referenceestes1969a + and keck1946a +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse grained fna xml/V19-20-21/V19 890.xml +
SynonymsArtemisia sect. Abrotanum +
Taxon familyAsteraceae +
Taxon nameArtemisia subg. Artemisia +
Taxon parentArtemisia +
Taxon ranksubgenus +
VolumeVolume 19 +