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Weed Identification

partridge pea

Family

Fabaceae

Scientific Name

Cassia fasciculata

Habit

forb/herb

Leaves

All leaves are divided into two rows of 8 to 15 leaflet pairs that are arranged oppositely from one another (pinnately compound). Each leaflet is linear to oblong in outline, approximately to 1 inch long by 2 to 4 mm wide. All leaflets occur on a petiole and a distinctive gland occurs on the underside of the petiole below the first leaflet pair.

Identifying Characteristics

Showy yellow flowers and leaves that are divided into 8 to 15 pairs of oppositely arranged leaflets. Also, the gland that occurs on the petiole below the first leaflet pair helps to distinguish this weed from other weeds with pinnately compound leaves.

Flower Seed Head

Arise from the position between the petiole and the stem (leaf axils). Flowers consist of 5 bright yellow petals and have some red mottling. Flowers are approximately 1 inch wide and occur on long (10 to 25 mm) flower stalks (pedicels).

Seed Fruit

A legume that is linear in outline, approximately 1 to 3 inches long and 4 to 6 mm wide. Each legume contains 4 to 20 seed.

Where Found

Partridgepea may be found throughout the eastern half of the United States.

Growth Habit

upright and nonwoody

Thorns or Spines

not present

Approximate Flower Diameter

Varies: 
pencil
dime
nickle

Dominant Flower Color

yellow

Flower Symmetry

bilateral symmetry

Leaf Hairs

no hairs

Leaf Arrangement

alternate

Leaf Margin

entire

Leaf Structure

pinnate

Leaf Stalk

longer than leaf

Stem Hairs

no hairs

Stem Cross Section

square or multi-edged

Milky Sap

not present

Root Structure

taproot

Life Cycle

summer annual

Ochrea

not present

Plant Type

Herb