E-Flora BC: Electronic Atlas of the Flora of British Columbia

Tanacetum bipinnatum (L.) Sch. Bip.
Floccose Tansy (dune tansy; Lake Huron tansy)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Dave Ingram  Email the photographer   (Photo ID #17206)

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Distribution of Tanacetum bipinnatum
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Tanacetum bipinnatum ssp. huronense

Species Information

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Perennial herb from a branched creeping rhizome; stems stout, erect or ascending, several, branched, moderately or more usually long-hairy with flattened hairs, sometimes reddish, 20-60 cm tall.
Basal leaves well-developed and larger than the stem leaves or reduced or lacking, rather thick with an expanded, clasping base, 2-3 times pinnately cut, the ultimate segments with indistinctly winged axis of the inflorescence and blunt or rounded tips; stem leaves similar, smaller, alternate, 5-20 cm long, 2-5 cm wide.
Heads with ray and disk flowers, several, terminal on the branches in a short, flat-topped inflorescence; involucres 4-6 mm tall; involucral bracts lanceolate to oblong, firm except for the papery margins and tip; ray flowers yellow, few; disk flowers yellow, 5-toothed, glandular.
Achenes squared off at the top, 5-angled, ribbed, glandular-dotted; pappus a minute, somewhat lobed crown.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to mesic sand dunes in the lowland zone; infrequent in coastal BC; S to N CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Tanacetum bipinnatum

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 0 8 15
Slope Gradient (%) 0 2 9
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
270 275 280
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 1 2
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: CWH(8)

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References