Tanacetum parthenium

(Linnaeus) Schultz-Bipontinus
Tanaceteen, 55. 1844.
Common names: Feverfew
Introduced
Basionym: Matricaria parthenium Linnaeus Sp. Pl. 2: 890. 1753
Synonyms: Chrysanthemum parthenium (Linnaeus) Bernhardi
Treatment appears in FNA Volume 19. Treatment on page 490. Mentioned on page 489.

Perennials, (20–)30–60(–80) cm. Stems 1–3+ (ridged), erect, branched (usually glabrous proximally, puberulent distally). 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. Heads 5–20(–30) in corymbiform arrays. Involucres 5–7 mm diam. Ray florets 10–21+ (more in “doubles”), pistillate, fertile; corollas white, laminae 2–8(–12) mm. Disc corollas ca. 2 mm. Cypselae ± columnar, 1–2 mm, 5–10-ribbed; pappi 0 or coroniform, 0.1–0.2+ mm. 2n = 18.


Phenology: Flowering Jun–Nov.
Habitat: Disturbed sites, urban areas, roadsides, fields, abandoned plantings
Elevation: 10–1900 m

Distribution

V19-818-distribution-map.gif

Introduced; B.C., Ont., Ala., Colo., Conn., Del., Idaho, Ill., Ind., Ky., Maine, Md., Mass., Mich., Miss., Mo., Mont., Nev., N.H., N.J., N.Y., N.C., Ohio, Oreg., Pa., R.I., S.C., Utah, Vt., Wash., W.Va., Wis., Wyo., Eurasia, n Africa, widely naturalized in New World and Old World.

Discussion

Tanacetum parthenium is widely cultivated throughout North America.

Selected References

None.

Lower Taxa

None.

... more about "Tanacetum parthenium"
Linda E. Watson +
(Linnaeus) Schultz-Bipontinus +
Matricaria parthenium +
Feverfew +
B.C. +, Ont. +, Ala. +, Colo. +, Conn. +, Del. +, Idaho +, Ill. +, Ind. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, Mont. +, Nev. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.C. +, Utah +, Vt. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Eurasia +, n Africa +  and widely naturalized in New World and Old World. +
10–1900 m +
Disturbed sites, urban areas, roadsides, fields, abandoned plantings +
Flowering Jun–Nov. +
Tanaceteen, +
Introduced +
Chrysanthemum parthenium +
Tanacetum parthenium +
Tanacetum +
species +