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

Tripleurospermum inodorum (L.) Schultz-Bip
scentless mayweed (false-chamomile)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Bryan Kelly-McArthur  Email the photographer   (Photo ID #85737)

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Distribution of Tripleurospermum inodorum
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Species Information

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Annual, biennial or sometimes perennial scentless herb from a fibrous root; stems erect, simple, branched, glabrous, 5-60 cm tall.
Basal leaves lacking; stems leaves alternate, 1-3 times divided into short, linear-threadlike segments, 2-8 cm long, glabrous; basal leaves deciduous by flowering time.
Heads with ray and disk flowers, several to numerous, mostly terminal on the upper branches; involucres 4-5 mm tall; involucral bracts subequal, mostly oblong, obtuse at the tips, with a broad, papery margin and central, dark, greenish or brownish area; ray flowers white, 10-25, 4-13 mm long; disk flowers yellow, many, about 1 mm long, 5-toothed; receptacles hemispheric, 5-8 mm tall.
Achenes asymmetric, 1.5-2 mm long, with 3 light-coloured, rounded, callous ribs on the inner face, the intervals brown and wrinkled; pappus a minute, toothed crown.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry shorelines, roadsides and disturbed areas in the lowland, steppe and montane zones; frequent throughout all but N BC; introduced from Europe.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Chamomilla inodora (L.) Gilib.
Matricaria inodora L.
Matricaria inodora var. agrestis
Matricaria maritima subsp. inodora (L.) Clapham
Matricaria maritima var. agrestis (Knaf) Wilmott
Matricaria perforata Mérat

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References