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Scentless Mayweed

Tripleurospermum inodorum

Please keep in mind that it is illegal to uproot a plant without the landowner's consent and care should be taken at all times not to damage wild plants. Wild plants should never be picked for pleasure and some plants are protected by law.
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Plant Profile

Flowering Months:
Asteraceae (Daisy)
Also in this family:
Alpine Blue Sow-thistle, Alpine Cotula, Alpine Fleabane, Alpine Saw-wort, Annual Ragweed, Annual Sunflower, Argentine Fleabane, Autumn Hawkbit, Autumn Oxeye, Beaked Hawksbeard, Beggarticks, Bilbao Fleabane, Black Knapweed, Black-eyed Susan, Blanketflower, Blue Fleabane, Blue Globe-thistle, Bristly Oxtongue, Broad-leaved Cudweed, Broad-leaved Ragwort, Brown Knapweed, Butterbur, Buttonweed, Cabbage Thistle, Canadian Fleabane, Canadian Goldenrod, Carline Thistle, Chalk Knapweed, Chamois Ragwort, Changing Michaelmas Daisy, Chicory, Chinese Mugwort, Chinese Ragwort, Coltsfoot, Common Blue Sow-thistle, Common Cat's-ear, Common Cudweed, Common Daisy, Common Dandelion, Common Fleabane, Common Goldenrod, Common Groundsel, Common Michaelmas Daisy, Common Mugwort, Common Ragwort, Common Wormwood, Coneflower, Confused Michaelmas Daisy, Corn Chamomile, Corn Marigold, Cornflower, Cotton Thistle, Cottonweed, Creeping Thistle, Daisy Bush, Dwarf Cudweed, Dwarf Thistle, Early Goldenrod, Eastern Groundsel, Eastern Leopardsbane, Elecampane, English Hawkweed, Fen Ragwort, Feverfew, Field Fleawort, Field Wormwood, Fox and Cubs, French Tarragon, Gallant Soldier, Garden Lettuce, Giant Butterbur, Glabrous-headed Hawkweed, Glandular Globe-thistle, Glaucous Michaelmas Daisy, Globe Artichoke, Globe-thistle, Goat's Beard, Golden Ragwort, Golden Samphire, Goldilocks Aster, Grass-leaved Goldenrod, Great Lettuce, Greater Burdock, Greater Knapweed, Grey-headed Hawkweed, Guernsey Fleabane, Hairless Blue Sow-thistle, Hairless Leptinella, Hairy Michaelmas Daisy, Harpur Crewe's Leopardsbane, Hawkweed Oxtongue, Heath Cudweed, Heath Groundsel, Hemp Agrimony, Highland Cudweed, Hoary Mugwort, Hoary Ragwort, Hybrid Knapweed, Intermediate Burdock, Irish Fleabane, Jersey Cudweed, Jerusalem Artichoke, Lance-leaved Hawkweed, Lavender-cotton, Leafless Hawksbeard, Least Lettuce, Leopardplant, Leopardsbane, Leptinella, Lesser Burdock, Lesser Hawkbit, Lesser Sunflower, London Bur-marigold, Magellan Ragwort, Marsh Cudweed, Marsh Hawksbeard, Marsh Ragwort, Marsh Sow-thistle, Marsh Thistle, Meadow Thistle, Melancholy Thistle, Mexican Fleabane, Milk Thistle, Mountain Everlasting, Mouse-ear Hawkweed, Musk Thistle, Narrow-leaved Cudweed, Narrow-leaved Hawkweed, Narrow-leaved Michaelmas Daisy, Narrow-leaved Ragwort, New England Hawkweed, New Zealand Holly, Nipplewort, Nodding Bur-marigold, Northern Hawksbeard, Norwegian Mugwort, Oxeye Daisy, Oxford Ragwort, Pearly Everlasting, Perennial Cornflower, Perennial Ragweed, Perennial Sow-thistle, Perennial Sunflower, Pineapple Mayweed, Plantain-leaved Leopardsbane, Ploughman's Spikenard, Plymouth Thistle, Pontic Blue Sow-thistle, Pot Marigold, Prickly Lettuce, Prickly Sow-thistle, Purple Coltsfoot, Rayed Tansy, Red Star Thistle, Red-seeded Dandelion, Red-tipped Cudweed, Robin's Plantain, Roman Chamomile, Rough Cocklebur, Rough Hawkbit, Rough Hawksbeard, Russian Lettuce, Safflower, Salsify, Saw-wort, Scented Mayweed, Sea Aster, Sea Mayweed, Sea Wormwood, Seaside Daisy, Shaggy Mouse-ear Hawkweed, Shaggy Soldier, Shasta Daisy, Shetland Mouse-ear Hawkweed, Shrub Ragwort, Sicilian Chamomile, Silver Ragwort, Slender Mugwort, Slender Thistle, Small Cudweed, Small Fleabane, Smooth Cat's-ear, Smooth Hawksbeard, Smooth Sow-thistle, Sneezeweed, Sneezewort, Spear Thistle, Spotted Cat's-ear, Spotted Hawkweed, Sticky Groundsel, Stinking Chamomile, Stinking Hawksbeard, Tall Fleabane, Tall Mouse-ear Hawkweed, Tansy, Thin-leaved Sunflower, Treasureflower, Trifid Bur-marigold, Tuberous Thistle, Tyneside Leopardplant, Viper's Grass, Wall Lettuce, Welsh Groundsel, Welted Thistle, White African Daisy, White Butterbur, White Buttons, Willdenow's Leopardsbane, Winter Heliotrope, Wood Burdock, Wood Ragwort, Woody Fleabane, Woolly Thistle, Yarrow, Yellow Chamomile, Yellow Fox and Cubs, Yellow Oxeye, Yellow Star Thistle, Yellow Thistle, York Groundsel
Life Cycle:
Annual or Biennial
Maximum Size:
1 metre tall
Fields, gardens, lawns, roadsides, wasteland.

White, many petals
Daisy-like flowers, larger than Scented Mayweed, up to 4.5cm, also having greenish-white but brown-edged sepal like bracts. No hole inside the flowerhead.
Flattish, ridged achene (seed).
2 to 3-pinnate, hairless, feathery, bristle-tipped leaflets.
Not scented, unlike the Scented Mayweed.
Other Names:
Baldr's Brow, False Chamomile, Mayweed, Scentless Chamomile, Scentless False Mayweed, Wild Chamomile.
Frequency (UK):

Similar Species

Other Information


Tripleurospermum inodorum, also known as Scentless Mayweed or False Chamomile, is an annual plant native to Europe. It is a weed that is known for its small, white, daisy-like flowers that have no scent. The plant prefers full sun and well-drained soil, and can grow up to 100 cm tall. It is often considered a weed as it can grow in fields, gardens, roadsides and waste ground. Scentless Mayweed is also known for its medicinal properties, but it's also toxic if ingested in high quantity, so it's not recommended to use it without proper knowledge.


Scentless Mayweed, also known as Tripleurospermum inodorum, is a common annual weed that belongs to the family Asteraceae. This weed is found throughout Europe, Asia, and North America, and it can be found in a variety of habitats, including agricultural fields, gardens, roadsides, and waste areas.


Scentless Mayweed is an annual plant that typically grows up to 1 meter tall. Its stems are branched and smooth, and its leaves are feathery and finely divided. The leaves are alternate and arranged in a spiral pattern on the stem. The flowers of Scentless Mayweed are small and white, and they are arranged in clusters at the end of the stems. The plant has a strong, unpleasant odor when crushed, hence the name "scentless."


Scentless Mayweed is a pioneer species that can colonize disturbed areas, such as agricultural fields, roadsides, and waste areas. It is often found in areas with high soil fertility and high moisture levels. The plant has a high reproductive rate, and it produces large numbers of seeds that can remain viable in the soil for several years.


Scentless Mayweed is considered a major weed in agricultural fields, as it competes with crops for resources such as water, nutrients, and light. It can also reduce crop yield by shading the crop plants and by releasing allelopathic chemicals that inhibit the growth of other plants. The plant can also cause allergic reactions in humans and animals, and it has been reported to cause dermatitis and respiratory problems.


The control of Scentless Mayweed in agricultural fields is typically achieved through the use of herbicides. However, the overuse of herbicides can lead to the development of herbicide-resistant weeds and can have negative impacts on the environment. Alternative control methods, such as crop rotation, tillage, and the use of cover crops, can be effective in reducing the density of Scentless Mayweed in agricultural fields.

Scentless Mayweed is a common weed that can cause significant economic and environmental problems. Its ability to colonize disturbed areas and to compete with crops for resources makes it a major weed in agricultural fields. The use of integrated pest management strategies that combine chemical, biological, and cultural control methods can be effective in reducing the density of Scentless Mayweed in agricultural fields.

More Information

Scentless Mayweed is not just a problem in agricultural fields but can also be a nuisance in gardens, parks, and other public areas. The plant can spread quickly and outcompete native species, reducing biodiversity and altering the ecosystem. In addition, its unpleasant odor can make it an unwelcome addition to public spaces.

One effective way to control Scentless Mayweed in these areas is through manual removal, which involves physically pulling or cutting the plant. This method is particularly useful in small infestations or in areas where the use of herbicides is not practical. It is important to remove the plant before it sets seed to prevent further spread.

Another method of control is the use of biological control agents, such as insects and pathogens, which can reduce the density of Scentless Mayweed without harming other plant species or the environment. However, the use of biological control agents requires careful evaluation and monitoring to ensure that unintended consequences do not occur.

Prevention is key to reducing the spread of Scentless Mayweed. Proper sanitation practices, such as cleaning equipment and vehicles that have been in contact with the plant, can prevent the accidental spread of seeds. In addition, planting native species that are well adapted to local conditions can help to reduce the opportunity for Scentless Mayweed to establish and spread.

Scentless Mayweed is not just a nuisance weed but also has some medicinal properties. It has been used in traditional medicine to treat a variety of ailments, such as fever, diarrhea, and respiratory infections. The plant contains compounds such as chamazulene, flavonoids, and sesquiterpene lactones, which are believed to be responsible for its medicinal properties.

However, it is important to note that the use of Scentless Mayweed as a medicinal plant should be done under the guidance of a qualified healthcare practitioner, as the plant can cause adverse reactions in some people. In addition, the use of wild plants for medicinal purposes should be done responsibly to ensure the sustainability of the plant population.

Scentless Mayweed is also a valuable plant for pollinators such as bees and butterflies. Its small white flowers provide a source of nectar and pollen, which are important food sources for these insects. By allowing Scentless Mayweed to grow in areas where it is not causing harm, we can support pollinator populations and promote biodiversity.

In conclusion, Scentless Mayweed is a complex plant with both negative and positive aspects. While it can be a problematic weed in agricultural fields and other areas, it also has some medicinal properties and provides a valuable source of food for pollinators. Effective control strategies require a balanced approach that takes into account both the negative and positive aspects of the plant. By doing so, we can minimize its negative impacts while maximizing its potential benefits.

Distribution Map

Reproduced by kind permission of the BSBI.

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