P. Rodney Thompson
Director


Address:

 

829 South Coleman
Tooele, UT 84074

Telephone Number:


Main: (435) 843-3204

 

Hours:

7:00 am - 6:00 pm
Monday - Thursday
Except Holidays
Closed Fridays

Weed Control Division - Noxious Weeds


 

Diffuse Knapweed
(Centaurea diffusa Lam.)

Growth Habit:
Annual or biennial, bush, up to 2 feet tall. Rosette formed first year, flowering stalk elongates second year.

Leaves:
Grayish, alternate, basal leaves whorled, upper leaves much reduced. Covered with fine hair.

Stems:
Hairy, erect, single main stem from a rootstock, branched near or above the base.

Flower:
Solitary, usually white, sometimes pink, rose or lavender; seed head bracts end as sharp, rigid spines.

Roots:
Elongated taproot.

Seeds:
Oblong, dark brown or gray with longitudinal lines.

Other:
May seriously reduce productive potential of infested rangelands.
Diffuse Knapweed

Return to Noxious Weed page.

 

 

Tooele County | 47 South Main Street | Tooele, UT 84074 | Telephone: (435) 843-3100