Burke: Tanacetum vulgare

	Tanacetum vulgare
	common tansy
Habit	Coarse aromatic perennial from a stout rhizome, glabrous throughout, 4-15 dm. tall.
Leaves	Leaves numerous, 1-2 dm. long and nearly half as wide, usually sessile, pinnatifid, with winged rachis, the pinnae again pinnatifid, with broadly winged rachis, the pinnules often again toothed.
Flowers	Heads numerous, commonly 20-200, the inflorescence with a broad, rounded top, the disk about 5-10 mm. wide; involucre bracts imbricate, dry, the margins and tips papery; corollas all tubular, 5-toothed, yellow; pappus a minute crown.
Fruits	Achenes 5-ribbed, glandular.

	Tanacetum vulgare
Flowering time	July-October
Habitat	Roadsides, fields, shorelines, wastelots, and other disturbed, open areas at low to middle elevations.
Distribution	Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]
Origin	Introduced from Europe
Conservation status	Not of concern
Sibling taxa	T. balsamita, T. bipinnatum, T. parthenium
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Tanacetum vulgare

common tansy

Habit

Coarse aromatic perennial from a stout rhizome, glabrous throughout, 4-15 dm. tall.

Leaves

Leaves numerous, 1-2 dm. long and nearly half as wide, usually sessile, pinnatifid, with winged rachis, the pinnae again pinnatifid, with broadly winged rachis, the pinnules often again toothed.

Flowers

Heads numerous, commonly 20-200, the inflorescence with a broad, rounded top, the disk about 5-10 mm. wide;

involucre bracts imbricate, dry, the margins and tips papery;

corollas all tubular, 5-toothed, yellow;

pappus a minute crown.

Fruits

Achenes 5-ribbed, glandular.