Scentless Chamomile

Scentless Chamomile

Tripleurospermum inodorum

Information Sheet (pdf)

Eradication Zone Map (pdf)

Colorado List B

General

• Family: Sunflower (Asteraceae)
• Introduced from Europe

Common Names

• Mayweed, scentless mayweed

Habitat

• Can live as an annual, biennial or short-lived perennial
• Forb
• Found in meadows, pastures, rights-of-way, drainage area

Plant

Vegetation

• Leaves ferny, odorless
• Plant to 3 feet tall

Roots

• Fibrous

Flower

• 3/4 - 1 inch wide
• Centers tend to dome and the petals bend down as the flowers mature
• June - October
• Single on each stem
• White with yellow center

Seed

• As many as 300,000 per plant
• May last up to 15 years in the soil

Seedling

• May form dense patches
• Spring

Reproduction

• Seed

Control

Biological

• None

Chemical

• View Information Sheet (PDF)

Cultural

• Prevention
• Removal - make sure entire root is removed. Must be repeated as new  plants germinate
• Shallow tillage when plants are small, before flowers form

Mechanical

• Burning - N/A
• Grazing - N/A May cause blistering to livestock
• Mowing - N/A Plants will regrow

Use all chemicals according to the manufacturer's label. No specific recommendation or endorsement is made or implied by listing methods or products.