Pink, Rose, Red, or Purple Flowered Forbs

Pink, Rose, Red & Purple Flowered Forbs
Black henbane
Blue Mustard
Bull thistle
Canada thistle
Common burdock
Diffuse knapweed
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


Black Henbane
Hyoscyamus niger L. (Potato family, Solanaceae)


Erect, coarse, summer annual or biennial, 12 to 39 inches tall; foliage is covered with sticky glandular hairs; has a foul odor at all growth stages.

Leaves: Stems erect, leafy, branched (biennial form) or few branched (annual form), densely covered with long, glandular hairs; leaves alternate, gray-green, covered with short glandular hairs, short- stalked (lower) to sessile (upper), oblong to lanceolate, 2 to 8 inches long, coarsely toothed to acutely pinnate-lobed, with conspicuous pale veins covered with long glandular hairs.

Flowers: Flowers June to September; pale brownish-yellow flowers with purple centers and purple veins are found on long racemes in the axils of the upper leaves; flowers 5-lobed, fussed, funnel-shaped, 3/4 to 1-3/4 inches long.

Fruit: Fruits ovoid to pineapple-shaped, 5-lobed capsule, 1/2 to 1 inch long; seeds numerous, brown to gray, deeply pitted, and flattened, 1/16 inch long.


Cultivated and disturbed or degraded open sites in woodland and forest communities, and roadsides in sandy or well-drained loam soils with moderate fertility within elevations that generally range from 5,500 to 8,000 feet.


Reproduces by seed; seeds that mature early in a season typically produce biennial plants; biennial seedlings require a cold moist period to induce stem elongation and flowering; seeds maturing late in a season often produce annual plants; newly matured seeds germinate without light; seeds that become dormant germinate best when exposed to light; seed can remain viable for approximately 4 years.


Native to Eurasia; all plant parts contain tropane alkaloids and are toxic to humans and animals when ingested. New Mexico Class A noxious weed.

Collage of 4 images of black henbane



Forest Service Shield
Invasive plants and weeds of the national forests and grasslands in the southwestern region
Black henbane flowers black henbane flowers and seed capsules black henbane foliage black henbane plant