Partridge Pea (also known as Wild Sensitive Plant, Sleeping Plant)
Kingdom: Plantae, Division: Tracheophyta, Class: Magnoliopsida, Order: Fabales, Family: Fabaceae, Genus: Chamaecrista, Species: C. fasciculata · Fabaceae (Legume, Bean, or Pea family) · Compound (pinnate with multiple pairs of small leaflets)
Species
Chamaecrista fasciculata
Leaf Type
Compound (pinnate with multiple pairs of small leaflets)
Family
Fabaceae (Legume, Bean, or Pea family)
Shape
Oblong leaflets with rounded tips
Size
Individual leaflets are approximately 0.5 to 1 inch long; the overall compound leaf is around 2 to 4 inches long.
Margin
Entire (smooth edges)
Arrangement
Alternate along the stem
Rarity
Common
Color & Pattern
Bright medium green upper surface with a slightly paler underside; subtle yellowing spots due to minor fungal leaf spot or insect activity visible on some leaflets.
Venation Pattern
Pinnate with a prominent central midrib and fine parallel-like lateral veins
Texture & Surface
Smooth (glabrous) to finely pubescent on the margins, paper-textured leaflets
Description
Chamaecrista fasciculata is an annual herbaceous plant known for its bright yellow, showy flowers with prominent purple-red stamens. It features sensitive leaves that fold slightly when touched or at night. The plant typically grows between 1 to 3 feet tall with a branching habit.
Key Features
Pinnately compound leaves with numerous small, oblong leaflets, sensitive response to touch, bright yellow flowers, and flat bean-like pods.
Habitat
Found in open disturbed areas, old fields, prairies, open woods, roadsides, and sandy soils with full sun exposure.
Geographic Range
Native to eastern and central North America, ranging from New England south to Florida, and west to the Great Plains and Texas.
Condition Notes
Good overall health, though showing minor signs of natural fungal leaf spot or minor insect feeding typical of late summer foliage.
Interesting Facts
Partridge pea exhibits thigmonasty, meaning its leaves fold up in response to touch or mechanical stimulation. It also features extrafloral nectaries on the petioles that attract beneficial ants.
Medicinal & Uses
Used traditionally by some indigenous peoples for various ailments. Ecologically, it is widely utilized in pollinator conservation plantings, wildlife food plots for game birds, and prairie restoration projects.
Ecological Role
Serves as an important nectar and pollen source for native bees, bumblebees, and butterflies. The seeds are a favored food source for game birds like bobwhite quail and various songbirds. As a legume, it fixes nitrogen in the soil.
Similar Species
Sensitive Plant (Mimosa pudica), which has much more dramatic leaf movement and is typically found further south or indoors, and other Cassia or Chamaecrista species which may have different gland positions or flower sizes.
Foraging Tips
Look in dry, sandy, open soils during mid-to-late summer when the bright yellow flowers are in full bloom. Gently brush a leaflet to observe the sensitive folding behavior.
Toxicity Warning
Non-toxic. The plant is generally considered safe for livestock and wildlife, though large quantities of seeds can occasionally cause mild digestive upset in grazing animals.