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Weed Identification

toothed spurge

Family

Euphorbiaceae

Scientific Name

Euphorbia dentata

Other Common Names:

wild poinsettia

Leaves

Leaves are lanceolate in outline, approximately 1/2 to 3 inches long, with toothed margins. Leaves are oppositely arranged, usually have hairs, and often have at least one dark red spot on the upper surface, especially with age. Lower leaves may sometimes be alternately arranged. Leaves at the ends of stems near the flowers often appear whorled.

Identifying Characteristics

Opposite, lanceolate leaves with dark red markings and milky sap emitted by all parts of the plant.Erect annual with lanceolate leaves that often have at least one dark red spot. All parts of the plant emit a milky sap when broken.

Flower Seed Head

Flowers occur in clusters at the ends of branches. Flowers are relatively inconspicuous and have no petals.

Seed Fruit

A capsule that is yellowish-green in color and smooth. Each capsule normally contains 3 seeds.

Where Found

Toothed spurge may reach 2 feet in height and is found from New York west to Arizona. Toothed spurge is primarily a weed of pastures, hayfields, roadsides, and other noncrop areas.

Growth Habit

upright and nonwoody

Thorns or Spines

not present

Approximate Flower Diameter

larger

Dominant Flower Color

Varies: 
white
yellow

Flower Symmetry

not symmetrical

Leaf Hairs

has hairs

Leaf Shape

Varies: 
lance
oval

Leaf Arrangement

Varies: 
alternate
opposite

Leaf Margin

serrated

Leaf Structure

simple

Leaf Stalk

shorter than leaf

Stem Hairs

has hairs

Stem Cross Section

round or oval

Milky Sap

present

Root Structure

taproot

Life Cycle

summer annual

Ochrea

not present

Plant Type

Herb