Tanacetum parthenium |
Tanacetum vulgare |
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common feverfew, featherfew, feverfew, feverfew tansy |
common tansy, tanaisie vulgaire, tansy |
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Habit | Perennials, (20–)30–60(–80) cm. | Perennials, mostly 40–150 cm. |
Stems | 1–3+ (ridged), erect, branched (usually glabrous proximally, puberulent distally). |
1–2+ (ridged), erect, branched distally (glabrous or sparsely hairy). |
Leaves | mainly cauline; petiolate; blades ovate to rounded-deltate, 4–10+ × 1.5–4 cm, usually 1–2-pinnately lobed (primary lobes 3–5+ pairs, ± ovate), ultimate margins pinnatifid to dentate, faces (at least abaxial) usually puberulent, gland-dotted. |
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 | 5–7 mm diam. |
5–10 mm diam. |
Receptacles | convex to conic, epaleate. |
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Ray florets | 10–21+ (more in “doubles”), pistillate, fertile; corollas white, laminae 2–8(–12) mm. |
0 (heads disciform, peripheral pistillate florets ca. 20; corollas yellow, lobes 3–4). |
Disc corollas | ca. 2 mm. |
2–3 mm. |
Heads | 5–20(–30) in corymbiform arrays. |
20–200 in compact, corymbiform arrays. |
Cypselae | ± columnar, 1–2 mm, 5–10-ribbed; pappi 0 or coroniform, 0.1–0.2+ mm. |
1–2 mm, 4–5-angled or -ribbed, gland-dotted; pappi coroniform, 0.2–0.4 mm. |
2n | = 18. |
= 18. |
Tanacetum parthenium |
Tanacetum vulgare |
|
Phenology | Flowering Jun–Nov. | Flowering Jul–Sep. |
Habitat | Disturbed sites, urban areas, roadsides, fields, abandoned plantings | Disturbed sites (often moist), abandoned plantings |
Elevation | 10–1900 m (0–6200 ft) | 10–1600 m (0–5200 ft) |
Distribution |
AL; CO; CT; DE; ID; IL; IN; KY; MA; MD; ME; MI; MO; MS; MT; NC; NH; NJ; NV; NY; OH; OR; PA; RI; SC; UT; VT; WA; WI; WV; WY; BC; ON; Eurasia; n Africa; widely naturalized in New World and Old World [Introduced in North America]
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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 parthenium is widely cultivated throughout North America. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. | FNA vol. 19, p. 490. |
Parent taxa | Asteraceae > tribe Anthemideae > Tanacetum | Asteraceae > tribe Anthemideae > Tanacetum |
Sibling taxa | ||
Synonyms | Matricaria parthenium, Chrysanthemum parthenium | |
Name authority | (Linnaeus) Schultz-Bipontinus: Tanaceteen, 55. (1844) | Linnaeus: Sp. Pl. 2: 844. (1753) |
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