Russian knapweed is a perennial belonging to the Sunflower family, Asteraceae.

It grows from spreading black roots to 36 to 40 inches in height.

Stems are erect and have deep, pinnate (compound leaf with leaflets arranged on opposite sides of the axis) lobed, alternate linear leaves.

Inflorescence (flowering part of the plant) is a cone shaped flower consisting of pink or purple disk florets, subtended by involucral bracts (whorl of bracts subtending a flower or flower cluster).

VOLUNTEER WEED MAPPING
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connect with the U.S. Dept Agriculture Plant Data Base

Last Updated: 2/9/09

Plants that do not grow naturally on this short grass prairie are called "invasive species."

INFORMATION from US Fish & Wildlife

INFORMATION from USGS

ANNUAL RYE
CANADA THISTLE
CHEAT GRASS
FIELD BINDWEED
KOCHIA
COMMON MULLEIN
MUSK THISTLE
RUSSIAN KNAPWEED
RUSSIAN OLIVE
RUSSIAN THISTLE