Scentless chamomile (Tripleurospermum inodorum)

Scentless chamomile

Tripleurospermum inodorum

Description

  • Daisy-like white flower with a yellow center at the end of each stem
  • Alternate branching pattern.
  • Ox-eye daisy, a similar-looking (also invasive) species has broader leaves.
  • Other similar looking plants such as pineapple weed and wild chamomile have distinct odours when the leaves are crushed, while scentless chamomile has no smell.
  • Mature plant has a bushier appearance than oxeye daisy.

Consequences of invasion

  • Forms monocultures that reduce biodiversity.
  • Reduce crop and pasture yield.

Introduction and spread

  • This plant reproduces by seed only. As soon as a flower has formed, it can contain up to 1 million viable seeds. Preventing this plant from going to seed is an important management tactic.
  • People transport seeds through contaminated soils, fill material, crop seed and animal feed or on clothing and equipment.
  • Seeds can be dispersed naturally by wind and can float in the air for up to 12 hours

Management Options

  • Spreads only by seed – mow to reduce seed production.
  • Frequent tillage prevents seedlings from establishing.
  • Hand pulling before the plant is in seed will prevent new infestations from spreading.
  • Be cautious of seeds in wildflower seed mixes, check the contents before planting.
  • Become PlantWise and learn about Grow Me Instead
  • Clean equipment, clothing and gear before leaving an infested site
  • Dispose invasive species properly at designated disposal sites

More information available:

ICBC Scentless Chamomile
Alberta Invasive Species Council – Scentless Chamomile

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