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Parrot's Feather

A popular aquatic garden plant that spreads with water currents, animals, boats/trailers and fishing gear. Dense stands can stagnate water, and increase breeding grounds for mosquitoes

Zebra/Quagga Mussels

These tiny freshwater mussels clog drains, damage infrastructure, and are very costly to control/eradicate learn more »

Giant Hogweed

A towering toxic invasive plant with WorkSafe BC regulations learn more »

Invasive Species Research Conference

Turning Science into Action! Co-hosted by Thompson Rivers University and the Invasive Species Council of BC. learn more »

European Fire Ant

A tiny ant with a toxic sting learn more »

Purple Loosestrife

An aggressive wetland invader that threatens plant and animal diversity learn more »

Orange Hawkweed

Also yellow, these invasive plants replace native vegetation along roadsides, and threaten areas not yet reforested learn more »

Japanese Knotweed

Grows aggressively through concrete, impacting roads and house foundations learn more »

Spotted Knapweed

A single plant spreads rapidly with up to 140,000 seeds per square metre learn more »

Scotch Broom

An evergreen shrub that invades rangelands, replaces forage plants, causes allergies in people, and is a serious competitor to conifer seedlings learn more »

Scentless Chamomile

Species
Matricaria maritima

Scentless chamomile (Matricaria maritima) is an annual to short-lived perennial. Considered noxious under the BC Weed Control Act, scentless chamomile is commonly found on low to mid-elevation sites, along roadsides, drainage ditches, fence lines, dry shorelines, hay fields, pastures, and other disturbed areas. Currently found in all agricultural regions of BC, scentless chamomile is a major concern in the Kootenay, Okanagan, Peace River, and Thompson areas.

Scentless chamomile has single, white, daisy-like flowers with yellow centers at the ends of each branched stem. Flowers are odourless when crushed, with semi-erect stems that are smooth and branched with fern-like leaves. Fruits are dark brown, rectangular, with 3 prominent, wing-like ribs on one side and a pale brown broad central area on the other side. Mature plants reach 0.15-1 metre in height.

Scentless chamomile produces rapidly by seed only, with a single plant producing up to 1 million seeds that are mature as soon as the flower forms. Seeds remain viable for up to 15 years in the soil and are readily dispersed by wind or water, on equipment and vehicles, or as a contaminant in soil, fill material, crop seed, and animal feed. Seeds can float on water for up to 12 hours and new infestations are often found around watercourses.

Transportation corridors serve as major sources of infestation and spread, and there is an increased risk of invasion to adjacent agricultural areas and aquatic systems. This plant can infest perennial forage crops and prefers areas with high soil moisture; therefore it is commonly found near ponds, streams, and other areas prone to seasonal flooding. Not eaten by livestock, dense stands of scentless chamomile can reduce crop yields in hay fields, pastures, grain fields, and other cultivated crops.

TIPS Factsheets

Gallery: Scentless Chamomile