Pink, Rose, Red, or Purple Flowered Forbs

Pink, Rose, Red & Purple Flowered Forbs
Alfalfa
Black henbane
Blue Mustard
Bull thistle
Canada thistle
Common burdock
Diffuse knapweed
Hounds-tongue
Iberian knapweed
Meadow knapweed
Musk thistle
Purple loosestrife
Purple starthistle
Red clover
Redstem filaree
Russian knapweed
Scotch thistle
Spiny plumeless thistle
Spotted knapweed
Squarrose knapweed
Tall morning-glory
Teasel

 

Meadow Knapweed
Centaurea debeauxii Gren. & Godr. (excluded) (Aster family, Asteraceae)
 

Description

Multi-stemmed, warm-season, perennial forb, 20 to 40 inches tall; stems are branched with one flower head at each tip; taprooted.

Leaves: Basal rosette leaves are lance-shaped, up to 6 inches long and 1-1/4 inches wide, slightly pubescent, and may be pinnately cut or have wavy margins; lower leaves are long-stalked, entire, coarsely lobed, or toothed; upper stem leaves are small, stalkless, unlobed, and almost bract-like.

Flowers: Flowers May to July; flower heads are solitary, rose to purple in color, occasionally white, and almost globe-shaped 5/8 inch in diameter; underneath the flower head are distinctive roundish, light to dark-brown bracts with papery, fringed margins.

Fruits: Fruit is an achene; seeds are about 1/8 inch long, ivory- white to light brown in color, and sometimes bearing a row of short hairs.

Habitat

Cultivated areas and disturbed or degraded sites in meadows, grassland and riparian communities, and roadsides; establishes in many soil types within elevations that generally range from 3,000 to 8,000 feet.

Propagation/Phenology

Reproduces primarily through seed production; plant can also re- sprout from root and crown fragments that have been disturbed.

Comments

Native to Europe; meadow knapweed is considered to be a hybrid between brown knapweed (C. jacea L.) and black knapweed (C. nigra L.); meadow knapweed is not very palatable to animals; once established, infestations are difficult to remove. New Mexico Watch List species.

Collage of 4 images of Meadow knapweed

 

 
Forest Service Shield
Invasive Plants and Weeds of the National Forests and Grasslands in the Southwestern Region
Meadow knapweed flower head Meadow knapweed flower head Meadow knapweed plant Knapweed knapweed infestation