Scentless chamomile

Discuss this plant with the guide — choose this profile as a possible match and prepare your observations for Colorado Plants & Practical Care.

Tripleurospermum inodorum

Colorado noxious weed · List B — Stop the spread. CO-rules-2025

Established in some areas. Requirements vary by location: eradication, containment or suppression to stop further spread. This is a management category, separate from danger ratings. Category source · What the lists mean.

Prolific seeds; reported livestock irritation. Exposure help.

Identification caveat: Not interchangeable with Roman chamomile, German chamomile or mayweed chamomile. Their poison and food-use records require exact name matching.

Still researching this plant

This is a sourced working profile. Evidence is incomplete for People, Dogs & cats. Identification and source-photo limits are explained below. Independent botanical and veterinary review is pending. Uncertainty is not a finding that the plant is safe.

Three views of this plant

Source-identified reference photographs; these are not a complete identification key. A source location outside Colorado does not establish local occurrence.

**habit** — A low branching scentless-chamomile plant with many white-and-yellow flower heads on bare ground.
Krzysztof Ziarnek, Kenraiz · CC BY-SA 4.0
Photo source and identification
Original record · Original image
Source-identified photograph with visual consistency check Tripleurospermum inodorum in Lubanowo near Banie, NW Poland Source labeling and visible consistency checked; not an independent specimen determination.
Wikimedia-generated thumbnail rescaling only; downloaded bytes unchanged. Gallery display preserves the full image; the catalog preview uses a CSS crop.

**seedling** — A scentless-chamomile seedling with elongated cotyledons and its first divided leaves in bare soil.
Krzysztof Ziarnek, Kenraiz · CC BY-SA 4.0
Photo source and identification
Original record · Original image
Source-identified photograph with visual consistency check Tripleurospermum inodorum seedling, Przęsocin near Szczecin, NW Poland Source labeling and visible consistency checked; not an independent specimen determination.
Wikimedia-generated thumbnail rescaling only; downloaded bytes unchanged. Gallery display preserves the full image; the catalog preview uses a CSS crop.

**foliage** — A close view of finely divided, threadlike scentless-chamomile leaves on a stem.
Rob Hille · CC BY-SA 3.0
Photo source and identification
Original record · Original image
Source-identified photograph with visual consistency check Tripleurospermum inodorum Source labeling and visible consistency checked; not an independent specimen determination.
Wikimedia-generated thumbnail rescaling only; downloaded bytes unchanged. Gallery display preserves the full image; the catalog preview uses a CSS crop.

Recognize

White ray flowers surround a yellow center above finely divided, nearly odorless leaves. J-scentless-chamomile

Plants & habitat

Dense seedlings develop in meadows and disturbed ground. Many persistent seeds and regrowth after mowing complicate control. J-scentless-chamomile

People

The reviewed sources do not establish species-specific ingestion effects or a safe exposure amount for people. Missing evidence does not establish safety.

Dogs & cats

The reviewed sources do not establish species-specific ingestion effects or a safe exposure amount for dogs or cats. Missing evidence does not establish safety.

Other animals

The county reports possible blistering in livestock but provides limited clinical detail. Do not assume unrestricted grazing is safe. J-scentless-chamomile

Before taking action

Confirm identification and the requirements of your county weed program. For chemical treatment, follow the current product label, including restrictions around animals and water. S27

References

CO-rules-2025 — Colorado Noxious Weed Act rules, 8 CCR 1206-2, Colorado Secretary of State / Department of Agriculture. Accessed 2026-09-07T01:07:48+00:00. Locator: Parts 3.1, 4.1, 5.1; management provisions; effective May 15, 2025.
J-scentless-chamomile — Scentless Chamomile, Jefferson County, Colorado. Accessed 2026-09-07T01:08:59+00:00. Locator: Species description and management.
S27 — 2103 – Colorado Noxious Weeds, PlantTalk Colorado · CSU Extension. Accessed 2026-09-07T00:23:57+00:00. Locator: List A, B and C management categories.

Content revised 2026-09-07 03:50:00Z · Source checks dated separately in the references.