bursage mugwort, ragweed sagebrush
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Biennials or perennials, 30–100 cm, faintly aromatic (rhizomatous). |
Annuals, biennials, or perennials (shrubs in A. californica, subshrubs in A. nesiotica); usually fibrous-rooted, sometimes taprooted, caudices sometimes woody, rhizomes sometimes present. |
1–3, erect, reddish brown, simple (leafy), glabrous or glabrate. |
usually not wandlike (wandlike in A. californica, A. nesiotica, A. palmeri). |
basal (in rosettes, petiolate) and cauline, bicolor (white and green); blades ovate, 3–7(–20) × 2–4(–6) cm, 2–3-pinnately-lobed (lobes elliptic, 2–6 mm wide; cauline sessile, smaller), faces tomentose (abaxial) or glabrous or glabrescent (adaxial), glandular. |
usually deciduous, rarely persistent, basal (rosettes) and/or cauline (not in fascicles). |
broadly ovate, 3–5 × 4–5(–6) mm. |
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glabrous (paleate in A. palmeri). |
pistillate 4–5(–13), (1–1.5 mm); bisexual 25–35; corollas yellow, 1.5–2 mm, glabrous. |
usually peripheral 3–20 pistillate and fertile (0 pistillate in A. nesiotica, A. palmeri); central (or all) 14–70 bisexual and fertile; corollas funnelform. |
broadly ovate, sparsely hairy. |
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(nodding, peduncles 0 or 2) in paniculiform to racemiform arrays 10–35 × 2–4 cm (often 1-sided). |
usually disciform (discoid in A. nesiotica and A. palmeri). |
elliptic, 0.5–0.8 mm, glabrous. |
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Flowering late summer–early fall. |
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Open coniferous forests, mid to upper montane |
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2200–3100 m (7200–10200 ft) |
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AZ; CO; NM; Mexico (Chihuahua)
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Widespread in Northern Hemisphere; especially North America; Europe; and central and northern Asia; sporadic in South America and northern Africa |
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Species ca. 220 (27 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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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) | A. 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) | A. californica |
3. Subshrubs (10–60 cm, stems mostly prostrate); leaves 3-lobed (lobes 1–2 mm wide); Channel Islands, California | A. 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 | A. annua |
5. Annuals or biennials, (10–)30–80(–150) cm, not aromatic; leaves 1–2-pinnately lobed; arrays of heads 2–4 cm diam | A. 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) | A. 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). | A. globularia |
9. Involucres 3–4 × 3.5–5 mm; phyllaries lanceolate (margins white); corollas yellow, glabrous or pilose | A. 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 | A. 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. | A. alaskana |
12. Plants (5–)10–40 cm; leaves 1–3-palmately lobed | A. 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) | A. 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 | A. laciniata |
| A. 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 |
| → 19 |
17. Leaves usually entire, sometimes toothed or lobed; involucres 4–5 mm diam | A. 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 | A. ludoviciana |
18. Involucres 3.5–4 mm; phyllaries (violet-brown) sparsely tomentose (w North America) | A. tilesii |
19. Phyllaries glabrous or sparsely hairy (coast, n California to British Columbia) | A. 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). | A. 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) | A. serrata |
21. Leaves mostly deeply lobed (lobes 4–20 mm; mostly e North America, introduced w coast) | A. 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) | A. stelleriana |
23. Leaves bright green, lobes acute (not coastal dunes) | → 24 |
24. Involucres (4–)5–8 × 4–10 mm; 0–3800 m | A. norvegica |
24. Involucres 2.5–3.5 × 2–4.5 mm; 100–2400 m | A. packardiae |
25. Plants 30–100 cm, lemon-scented; heads usually erect (subalpine and alpine). | A. 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. | A. pontica |
26. Biennials or perennials (erect) | → 27 |
27. Leaves pinnatifid (lobes 3–5, 0.5–1 mm wide); grasslands or deserts, 600– 2900 m | A. carruthii |
27. Leaves 2–3-pinnately lobed (lobes elliptic, 2–6 mm wide); w mountains, 2200–3100 m | A. franserioides |
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FNA vol. 19, p. 525. |
FNA vol. 19, p. 520. |
Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia |
Asteraceae > tribe Anthemideae > Artemisia |
A. abrotanum, A. absinthium, A. alaskana, A. aleutica, A. annua, A. arbuscula, A. biennis, A. bigelovii, A. borealis, A. californica, A. campestris, A. cana, A. carruthii, A. douglasiana, A. dracunculus, A. filifolia, A. frigida, A. furcata, A. globularia, A. glomerata, A. laciniata, A. longifolia, A. ludoviciana, A. michauxiana, A. nesiotica, A. norvegica, A. nova, A. packardiae, A. palmeri, A. papposa, A. pattersonii, A. pedatifida, A. pontica, A. porteri, A. pycnocephala, A. pygmaea, A. rigida, A. rothrockii, A. rupestris, A. scopulorum, A. senjavinensis, A. serrata, A. spiciformis, A. stelleriana, A. suksdorfii, A. tilesii, A. tridentata, A. tripartita, A. vulgaris |
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A. abrotanum, A. alaskana, A. annua, A. biennis, A. californica, A. carruthii, A. douglasiana, A. franserioides, A. furcata, A. globularia, A. glomerata, A. laciniata, A. longifolia, A. ludoviciana, A. michauxiana, A. nesiotica, A. norvegica, A. packardiae, A. palmeri, A. papposa, A. pontica, A. senjavinensis, A. serrata, A. stelleriana, A. suksdorfii, A. tilesii, A. vulgaris |
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A. section Abrotanum |
Greene: Bull. Torrey Bot. Club 10: 42. (1883) |
unknown |
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