Stickweed

Verbesina occidentalis

Alternate names
Yellow Crownbeard

Weed Description
A perennial that may reach as much as 13 feet in height with showy yellow flowers and conspicuous wings that run along the length of the stem. Stickweed is primarily a weed of pastures, hay fields, fencerows, roadsides, and rights-of-way.

Seedlings
Cotyledons are oval and without hairs (glabrous). The first true leaves are opposite and lanceolate in outline with slightly toothed margins.

Leaves
Leaves are lanceolate to ovate in outline, approximately 3 to 8 inches long and 2 to 4 inches wide. Leaves are without hairs (glabrous), taper to the apex and have a toothed, or serrated, margin. Leaves are arranged oppositely along the stem, unlike in wingstem.

Stems
Erect, usually unbranced but occasionally branching, ranging from 6 1/2 to 10 feet in height. Stems are usually without hairs but occasionally have small hairs. Several wings run the length of the entire stem. Stems usually persist throughout the winter, which is more than likely where this weed gets one of its common names.

Flowers
Many flowers occur in clusters at the ends of the erect stems. Each flower consists of outer ray flowers and inner disc flowers, all of which are bright yellow in color. Ray flowers are approximately 1/2 to 3/4 inches long, 4 to 7 mm wide.

Fruit
A brown to black nutlet.

Roots
A large perennial basal crown from which many new plants may arise.

Identifying Characteristics
The tall growth habit, oppositely arranged lanceolate leaves, yellow flowers, and distinctive wings that run the length of the stems are all characteristics that help to distinguish stickweed from most other plants. A closely related species, Wingstem (Verbesina alternifolia), is similar in appearance but has alternately arranged leaves unlike those of stickweed.

Office of Programs

University of Missouri

Stickweed

Verbesina occidentalis