UW Burke Herbarium species comparison

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Tanacetum bipinnatum

Tanacetum balsamita

camphor tansy, dune tansy

costmary
Habit Stout herbaceous perennial from rhizomes, the stem 2-6 dm. tall, villous with flattened hairs. Coarse, fragrant perennial, the stem 5-12 dm. tall, glabrous below but with appressed, aligned hairs above.
Leaves

Basal leaves well developed and larger than the cauline leaves or wanting;

cauline leaves 5-20 cm. long, bi- or tri-pinnatifid, the ultimate segments blunt or rounded.

Basal leaves elliptic or broadly oblanceolate with rounded teeth, the blade 10-25 cm. long and 2.5-8 cm. wide, with a petiole of similar length;

cauline leaves smaller and sessile;

leaves silky when young, becoming glabrate.
Flowers

Heads several in a short, flat-topped inflorescence;

involucre bracts dry, imbricate, the margins and tip scarious; disk 8-15 mm. wide;

rays yellow, pistillate, short, barely surpassing the marginal disk flowers;

disk flowers yellow, perfect, with 5-lobed tubular corolla;

pappus a minute crown.

Basal leaves elliptic or broadly oblanceolate with rounded teeth, the blade 10-25 cm. long and 2.5-8 cm. wide, with a petiole of similar length;

cauline leaves smaller and sessile;

leaves silky when young, becoming glabrate.
Fruits

Achene 5-ribbed, glandular.

Achenes sub-terete, 10-ribbed.

Tanacetum bipinnatum

Tanacetum balsamita
Flowering time May-September August-September
Habitat Sand dunes along the coast. Roadsides and other waste places.
Distribution
Occurring west of the Cascades crest along the coast of Washington; Alaska to California, east across Canada to the Great Lakes region and northeastern North America.
[WildflowerSearch map]
[BONAP county map]
Occurring scattered locations on both sides of the Cascades crest in Washington; southern British Columbia to California, east across much of North America to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
Origin Native Introduced from Asia
Conservation status Not of concern Not of concern
Sibling taxa
T. balsamita, T. parthenium, T. vulgare
T. bipinnatum, T. parthenium, T. vulgare
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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