File Size: 60 KB
Lamium amplexicaule  L.
Riley County, Kansas
Annual or biennial
Height: 4-14 inches
Family: Lamiaceae - Mint Family
Flowering Period:   March, April, May
Stems: Decumbent, branched at base; branches ascending, slender, 4-angled (square), inconspicuously hairy or nearly glabrous, often streaked with purple.
Leaves: Opposite, simple, circular to egg-shaped, 1/5 to 3/5 inch long, usually as wide as long, 3-lobed or not, sometimes purplish in coloration, pubescent; margins with rounded teeth; tip blunt to rounded; lower leaf stalks to 1.4 inch long; upper leaves subtending flower clusters, sessile or clasping, 3/5 to 1 inch long.
Inflorescences: Whorl-like clusters, few, generally well spaced, 3-6-flowered, in axils of bracts; bracts leaf-like, rarely 3-lobed, generally wider than long, sessile and clasping.
Flowers: Calyx tubular, 1/5 to 1/3 inch long, 5-lobed, densely soft-hairy; lobes narrow, erect; corolla 2-lipped, 2/5 to 4/5 inch long, pinkish-purple, upper lip often darker, pubescent outside, glabrous inside; tube straight, 2/5 to 3/5 inch long; upper lip entire to slightly notched, 1/8 to 1/5 inch long; lower lip heart-shaped, to 1/10 inch long; stamens 4; small non-opening, self-pollinating flowers produced in fall, white-hairy.
Fruits: Nutlets, 4, egg-shaped, 3-angled, smooth, tan to olive, each 1-seeded.
Habitat: Waste areas, lawns, cropland, and roadsides; moist, fertile soils.
Distribution: Throughout Kansas.
Origin: Introduced from Europe and now naturalized. It is thought to have arrived in the United States via lawn seed during the 1920's.
Uses: The seeds are consumed by some species of birds.
Comments: This common weed can be problematic in lawns. Henbit can grow under shrubs where grass will not. See related purple dead nettle, Lamium purpureum.

85 KB
Cloud County, Kansas
138 KB
Riley County, Kansas
180 KB
Jefferson County, Kansas
106 KB
Cloud County, Kansas
Henbit flowers
94 KB
Cloud County, Kansas