Flora of North America species comparison

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Tanacetum parthenium

common feverfew, featherfew, feverfew, feverfew tansy
Habit 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.
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.
Heads

5–20(–30) in corymbiform arrays.
Cypselae

± columnar, 1–2 mm, 5–10-ribbed;

pappi 0 or coroniform, 0.1–0.2+ mm.
2n

= 18.

Tanacetum parthenium
Phenology Flowering Jun–Nov.
Habitat Disturbed sites, urban areas, roadsides, fields, abandoned plantings
Elevation 10–1900 m (0–6200 ft)
Distribution
from FNA
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]
[WildflowerSearch map]
[BONAP county map]
Discussion

Tanacetum parthenium is widely cultivated throughout North America.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 490.
Parent taxa Asteraceae > tribe Anthemideae > Tanacetum
Sibling taxa
T. balsamita, T. bipinnatum, T. vulgare
Synonyms Matricaria parthenium, Chrysanthemum parthenium
Name authority (Linnaeus) Schultz-Bipontinus: Tanaceteen, 55. (1844)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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