Tanacetum vulgare |
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common tansy, tanaisie vulgaire, tansy |
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Habit | Perennials, mostly 40–150 cm. |
Stems | 1–2+ (ridged), erect, branched distally (glabrous or sparsely hairy). |
Leaves | basal (soon withering) and cauline; petiolate or sessile; blades broadly oblong or oval to elliptic, 4–20 × 2–10 cm, pinnately lobed (rachises ± winged, primary lobes 4–10 pairs, lance-linear to lanceolate or narrowly elliptic, often pinnately lobed or toothed), ultimate margins dentate, faces glabrous or sparsely hairy, gland-dotted. |
Involucres | 5–10 mm diam. |
Receptacles | convex to conic, epaleate. |
Ray florets | 0 (heads disciform, peripheral pistillate florets ca. 20; corollas yellow, lobes 3–4). |
Disc corollas | 2–3 mm. |
Heads | 20–200 in compact, corymbiform arrays. |
Cypselae | 1–2 mm, 4–5-angled or -ribbed, gland-dotted; pappi coroniform, 0.2–0.4 mm. |
2n | = 18. |
Tanacetum vulgare |
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Phenology | Flowering Jul–Sep. |
Habitat | Disturbed sites (often moist), abandoned plantings |
Elevation | 10–1600 m (0–5200 ft) |
Distribution |
AK; AR; AZ; CA; CO; CT; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SD; TN; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NF; NS; NT; ON; PE; QC; SK; Eurasia [Introduced in North America; widely introduced in New World and Old World]
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Discussion | Tanacetum vulgare escapes from and/or persists after cultivation. In the flora area, it is naturalized mostly in the northeastern and Pacific Coast states and provinces and sporadically elsewhere. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 19, p. 490. |
Parent taxa | Asteraceae > tribe Anthemideae > Tanacetum |
Sibling taxa | |
Name authority | Linnaeus: Sp. Pl. 2: 844. (1753) |
Web links |
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