Artemisia absinthium |
Artemisia glomerata |
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absinth wormwood, absinthe, absinthe wormwood, absinthium, armoise absinthe, common wormwood, green ginger, oldman, oldman wormwood, wormwood |
congested sagewort, cudweed sagewort, Pacific alpine wormwood |
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Habit | Perennials, 40–60(–100) cm (mat-forming), aromatic. | Perennials, 30–50(–100) cm (densely cespitose), mildly aromatic (not rhizomatous, caudices subterranean, branches clothed with persistent leaf bases). |
Stems | gray-green (sometimes woody proximally), densely canescent to glabrescent (hairs appressed). |
relatively numerous, ascending, brown, simple, hairy. |
Leaves | deciduous, gray-green; blades broadly ovate, 3–8 × 1–4 cm, mostly pinnately lobed (basal 2–3-pinnatifid, lobes obovate), faces densely canescent. |
mostly basal (cauline mostly 2–4, smaller), whitish; blades (basal) flabellate, 0.5–1(–2) × 0.5–0.8(–1.5) cm, relatively deeply lobed (lobes 5–9, linear), faces strigillose. |
Involucres | broadly ovoid, 2–3 × 3–5 mm. |
broadly campanulate, 3–4 × 3.5–5 mm. |
Florets | pistillate 9–20; bisexual 30–50; corollas 1–2 mm, glandular. |
pistillate 4–5; bisexual 10–15; corollas yellow (3–5-toothed), 2–2.5 mm, glabrous or sparsely pilose. |
Phyllaries | gray-green, densely sericeous. |
lanceolate (margins brownish), densely pilose. |
Heads | (nodding) in open (diffusely branched), paniculiform arrays 10–20(–35) × (2–)10–13(–15) cm. |
(3–10, erect or nodding, peduncles 0 or to 15 mm) in subcapitate to corymbiform arrays 1–5 × 2–4 cm. |
Cypselae | (± cylindric, slightly curved, obscurely nerved), ± 0.5 mm, glabrous (shiny). |
ellipsoid (flattened, margins ribbed), 1–1.5 mm, glabrous. |
2n | = 18. |
= 18, 27, 36, 54. |
Artemisia absinthium |
Artemisia glomerata |
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Phenology | Flowering mid summer–fall. | Flowering mid summer. |
Habitat | Widely cultivated, persisting from plantings, disturbed areas | Arctic and alpine tundra and sandy slopes |
Elevation | 0–1000 m [0–3300 ft] | 0–1000 m [0–3300 ft] |
Distribution |
CA; CO; CT; IA; ID; IL; IN; KS; MA; MD; ME; MI; MN; MO; MT; NC; ND; NE; NH; NJ; NY; OH; OR; PA; RI; SC; SD; TN; UT; VT; WA; WI; WY; AB; BC; MB; NB; NF; NS; ON; PE; QC; SK; Europe [Introduced in North America]
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AK; YT
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Discussion | Artemisia absinthium provides the flavoring as well as the psychoactive ingredient for absinthe liquor, a beverage that is illegal in some markets. Known as a powerful neurotoxin, absinthe in large quantities is addictive as well as deadly. The species is popular in the horticultural trade. Prized by gardeners for its gracefully scalloped leaves and gray-green foliage, it creates an attractive and winter-hardy flower border. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Artemisia glomerata is similar to A. senjavinensis; it can be distinguished by its more deeply lobed leaves and sparser indument. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 19, p. 519. | FNA vol. 19, p. 526. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Ajania glomerata, A. glomerata var. subglabra, A. norvegica var. glomerata | |
Name authority | Linnaeus: Sp. Pl. 2: 848. (1753) | Ledebour: Mém. Acad. Imp. Sci. St. Pétersbourg Hist. Acad. 5: 564. (1815) |
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