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Scentless Mayweed

Scentless Mayweed

Tripleurospermum inodorum

Identify the Scentless Mayweed from a photo and log your finds with Florapass.

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How common: Very common

Alien species

Scentless Mayweed is a daisy-like annual that often pops up where soil is disturbed. It has white, daisy-style flowers with a yellow center but, true to its name, little or no smell when crushed. You can see it in fields, roadsides, yards and other open places.

Did you know?

  • Despite its daisy look, it is almost scentless—hence the name.
  • It can hybridise with Sea Mayweed (Tripleurospermum maritimum) where they grow together.

About the species

Identification

Erect plant 10–80 cm tall, usually branching above. Stems green. Leaves soft and very finely divided into many narrow threads, giving a dill-like look. Flower-heads on long stalks, 2–5 cm across, with a yellow center and a ring of white petal-like pieces (usually fewer than 20). Almost no scent when leaves or heads are crushed. Seeds small and brown. Easy clues: oxeye daisy has broader leaves; pineappleweed lacks the white ring and smells strong; sea mayweed has thicker, fleshy leaves and is mostly coastal. Flowers in Finland from June to October.

Plant group

Herbaceous plants

Habitat

yards and roadsides

Flowering

Jun–Oct

About the habitat

Open, sunny, disturbed ground: arable fields, roadsides, gardens, lawns and waste places. Common in southern and central Finland; rare in southwest Lapland and only occasional elsewhere in the north.

Sources

Photo: Thomas Skyt, CC BY 2.0 https://commons.wikimedia.org/wiki/File:Tripleurospermum Perforatum.jpg

Text: Pinkka: Verso- ja leviäintunnistus - Kaikki leviäimet, CC BY 4.0 https://laji.fi/taxon/MX.39823

Text: Pinkka: Verso- ja leviäintunnistus - Kaikki versot, CC BY 4.0 https://laji.fi/taxon/MX.39823

Text: Pinkka: Laaja maatalouslajintuntemus 4 op - Koppisiemeniset, CC BY 4.0 https://laji.fi/taxon/MX.39823

Text: Pinkka: Ålandsexkursion, CC BY 4.0 https://laji.fi/taxon/MX.39823

Text: Pinkka: Kasvien talvi - Talvivihreät luonnonkasvit, CC BY 4.0 https://laji.fi/taxon/MX.39823

Text: Wikipedia (Finnish), CC BY-SA 4.0 https://fi.wikipedia.org/wiki/Peltosaunio

See also