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Scentless Chamomile
Common Name: Scentless Chamomile
Scientific Name: Tripleurospermum (Matricaria) perforata
Family: Asteraceae
Description
This plant can grow annual or biennial and sometimes even a short-lived perennial. It can be recognized by its numerous small and daisy-like flowers. Lower leaves disappear by flowering time. Stem leaves are finely divided into short, thread-like segments. They don’t smell when crushed.
Range in Yukon: Scentless Chamomile has been found throughout the southern Yukon including Haines Junction, Whitehorse, Ross River, Teslin, Nisutlin and Watson Lake. It has also been found along highways and other road system far away from communities.
Similar Species
Seaside Chamomile (T. maritima) is a rare plant on the Yukon arctic coast. Pineapple Weed (M. discoidea) is another introduced plant that lacks petals and has a strong odor when crushed.
Ecological Impact
Scentless Chamomile is unpalatable to livestock and can form dense stands in pastures. It is likely to alter soil moisture and nutrient availability for other plants.
Control
Hand-pulling can be effective in small infestations. Seed production can be lowered if plants are mowed before they flower. Seeds do not produce pappus (fluff – like dandelions) and so does not spread as easily as many other species in the daisy family. Since the plants do not compete well with vigorous plants, encouraging competitive plant grow may also be used to control infested areas. To date all Yukon infestations known have been small and easily controlled.
Contact Environment Yukon Government of Yukon Box 2703 (V-5N) Bruce Bennett, Wildlife Viewing Biologist Phone: 867-667-5331 Email: bruce.bennett@gov.yk.ca |
