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sensitive partridge pea

Scientific Name: Chamaecrista nictitans ssp. patellaria var. patell

Family: Fabaceae

Category: Dicot

Growth: Subshrub, Forb/herb

Duration: Annual, Perennial

Other Names:

       

Chamaecrista nictitans: Sensitive Partridge Pea

Chamaecrista nictitans, also known as sensitive cassia, sensitive partridge pea, small partridge pea, or wild sensitive plant, is a herbaceous legume species.

Considerations for Pets

  • The plant has pinnately-compound leaves, potentially attractive to curious pets.

Considerations for Children

  • The leaflets are known to fold together when touched, which can be intriguing for children.

Taxonomy and Nomenclature

  • Scientific Name: Chamaecrista nictitans (L.) Moench var. nictitans
  • Family: Fabaceae (Pea Family), Subfamily Caesalpinioideae
  • Kingdom: Plantae
  • Taxonomic Rank: Subspecies
  • Synonym: Cassia nictitans
  • Common Names: Sensitive partridge pea, sensitive plant, partridge pea, wild sensitive plant. Other common names include sleeping plant, prairie partridge pea, showy partridge pea, prairie senna, large-flowered sensitive-pea, dwarf cassia, golden cassia, and locust weed.

Distribution and Habitat

  • Native to North America.
  • Widespread and locally common.
  • Found in damp ditches.

Ecological Role

  • Nitrogen-fixing annual, useful for rebuilding soil.
  • Seeds provide food for quail, prairie-chickens, pheasants, ducks, and other grassland birds.
  • Nectar is a food source for pollinators.
  • Caterpillar food plant for a number of butterflies.

Morphological Characteristics

  • Slender-stemmed annual, typically up to 1 foot tall, but some sources suggest up to 3 feet.
  • Low-growing pea with yellow flowers.
  • Pinnately-divided leaves with up to 20 leaflets.
  • Erect, slender stems, glabrous to minutely pubescent, usually branched with ascending to widely spread branches.
  • Leaves sometimes sensitive to touch, folding when disturbed. Leaflets also close completely at night.
  • Flowers are small but prominent yellow.

Quirky Facts

  • The leaflets fold together when touched with a finger and close completely at night because they are sensitive to light too.

Similar Species

  • Chamaecrista fasciculata: Showy partridge pea, also called sleeping plant or sensitive plant, which has leaves that are sensitive to the touch.

Further Information

  • Dave's Garden: A community that shares tips and ideas for gardens, along with seeds and plants.
  • Wikimedia Commons: For images (e.g., File:Chamaecrista nictitans - Sensitive Partridge Pea.jpg).