Tripleurospermum inodorum (Scentless Chamomile) - photos and description




Three plants in above photo



Central disk rounded


General: Branching, hairless, weedy annual. Plants glabrous. Foliage odorless when crushed.

Designated a noxious weed in Saskatchewan. 

Flowers: Inflorescence more or less corymbose, the flower heads measured to 3.5 cm diameter, rays 12 mm long, central disk 1 cm diameter. Central disk rounded, not conical.

Leaves: Leaves are alternate, divided 2 or 3 times into thread-like segments. Leaf measured at 4 cm long by 3 cm wide.

Height: Budd's Flora lists the height to 70 cm, we measured plants to 122 cm tall.

Habitat: Disturbed soil, waste ground, and road sides.

Abundance: Common.

Origin: Inroduced.

Synonym: Listed in some of the field guides we use as Matricaria maritima, and Matricaria perforata.

When and where photographed: The above photos were taken August 5th, waste ground on edge of Regina, SK.