Definition

Noun: - A taxonomic family of leguminous plants characterized by flowers with a distinctive butterfly-shaped corolla (papilionaceous flower). This group is traditionally classified within the larger legume family, Leguminosae (or Fabaceae).

Usage

• The term is used in botanical classification to describe a specific, traditional subgroup of flowering plants.
• It is often used in historical or specialized botanical contexts, as modern taxonomy more commonly places these plants within the subfamily Faboideae of the family Fabaceae.

Examples

Advanced Usage

• In Taxonomic Discussion: The term may appear in texts discussing the historical evolution of plant classification systems, where was treated as a separate family distinct from other legume groups like Mimosaceae and Caesalpiniaceae.
• In Descriptive Botany: Used to precisely describe the flower morphology, which has a large upper petal (the banner or standard), two lateral petals (wings), and two lower petals fused to form a boat-shaped structure (the keel).

Variants and Related Words

• Papilionaceae: The alternative and more standard spelling for this family name.
• Papilionaceous (adjective): Describing the characteristic butterfly-like flower shape.
  • The garden featured many plants with papilionaceous blooms.
• Faboideae: The modern subfamily name within Fabaceae that largely corresponds to the traditional .
• Leguminosae / Fabaceae: The broader pea or legume family.

Synonyms

• Pea family (common name)
• Papilionaceae (taxonomic synonym)

Notes

• This is a specialized scientific term. In contemporary botanical science, the grouping "family Papilionacea/Papilionaceae" is not widely used as a formal family rank. Most current systems classify these plants as the subfamily Faboideae within the family Fabaceae (Leguminosae). The term remains useful for describing the specific flower structure and in historical contexts.

Noun

1. leguminous plants whose flowers have butterfly-shaped corollas; commonly included in the family Leguminosae