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Lamium amplexicaule - henbit deadnettle

Scientific Family
Lamiaceae
Other common names
henbit
Plant type
Forbs and Subshrubs
Origin
Introduced
Lifecycle
Biennial or annual
Similar species
L. purpureum
Height
1-1/4 feet
Riparian
Yes

Branches from the base forming a mound or mat with flowers at the end of branches.

Long exserted flowers, broad overlapping sessile bracts forming a platform or bowl and upper triangular leaves on petioles, which are distinctly red or purple-tinted distinguish this species from L. purpureum.

Habitat

Open places in managed forests, agronomic and vegetable crop fields, orchards, vineyards, gardens, lawns, landscaped areas, fields, pastures, riparian, roadsides and other disturbed, unmanaged areas.

Plant Community
Disturbed Areas
Riparian
Low elevation
1100
High elevation
7000

Flower Characteristics

Flower clusters are arranged in whorls at the bases of upper leaves. Individual flowers are slender, reddish or purplish, tubular, two-lipped, and 1/2 to 3/4 of an inch long.

Flower color
Pink, purple, redish-purple
Flower shape
Irregular
Tubular
Yes
First bloom month
March
Last bloom month
August
Flower clusters
Other

Leaf and Stem Characteristics

Stems are square and often branch near the base. Leaves are roughly 1/3 to 1 inch long, sparsely hairy, and broadly egg shaped or heart shaped to nearly round. Upper leaves are sessile (directly attached to the stem) and lower leaves have petioles.

Leaf type
Simple
Leaf color
Green
Leaf shape
Round or oval
Leaf margin
Lobed
Leaf attachment
Opposite
Leaves clasp
No
Leaf hairs
Leaves & stems
Spines
No

Fruit and Seed Characteristics

The fruit is comprised of four nutlets contained in a tube-like structure (sepal tube). Nutlets less than 1/8 inch, shiny brown with white patches.

Fruit type
Nutlet
Fruit color
Brown with white patches

Brown, tiny and triangular in cross-section and have a rounded to squared tip and a long tapering base.