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

 

Teasel
Dipsacus fullonum L. (Teasel family, Dipsacaceae)
 

Description

Erect, stout, biennial forb, 3 to 6 feet tall; stem striate, angled, prickly on the angles and becoming more so upward; large taproot.

Leaves: Basal and stem leaves opposite, simple, blades may be prickly, especially on the midnerve below, otherwise glabrous; basal leaves oblong to oblanceolate, margins crenate, apex obtuse to acute; cauline leaves 1/2 to 1-1/4 inches long, the lower blades crenate to serrate, becoming entire upward, often ciliate; stem leaves are perfoliate (each pair of opposite leaves is joined at the point where they attach to the stem, giving the appearance of a single leaf pierced by the stem).

Flowers: Flowers July to October; inflorescence an erect, flower heads are ovoid to cylindrical, 1-1/4 to 4 inches long, flowers numerous; peduncles long, prickly; flower head bracts curving upward, linear, elongate, unequal, the longer ones often surpassing the heads; prickly, the apex spine-tipped; bracts of the receptacle tapering to an acuminate, stout, straight awn that surpasses the flowers; slender flowers lavender, pale purple or sometimes white, 4-lobed, 1/2 to 3/4 inch long.

Fruit: Achenes 1/4 inch long, 4-angled and appressed-hairy.

Habitat

Cultivated and disturbed or degraded sites in moist meadows and riparian communities, and roadsides within elevations that generally range from 4,700 to 8,700 feet.

Propagation/Phenology

A single teasel plant can produce over 2,000 seeds; up to 30 to 80 percent of the seeds may germinate or may remain viable for at least 2 years; typically seeds do not disperse far; most seedlings will be located near the parent plant.

Comments

Native to Europe; teasel flowers open in an unusual pattern; a band of flowers opens first around the middle of the head, then the blooms progress both up and down and eventually form two bands; the fusion of the two leaf bases at the stem forms something of a “cup” that catches and holds rainwater. New Mexico Class B noxious weed.

Collage of images of teasel

 

 
Forest Service Shield
Invasive plants and weeds of the national forests and grasslands in the southwestern region
Teasel flower head Teasel flower heads, stems and foliage Teasel basal rosettes Teasel stem and leaf arrangement