Definition

Noun: 1. A species of flowering plant: A coarse, biennial herb native to eastern North America, characterized by tall stems and yellow flowers that open in the evening. It has become naturalized in parts of Europe. * Scientific Classification: The word 'Oenothera biennis' is the botanical Latin name for this species, commonly known as the common evening-primrose.

Usage Examples

• Noun:
  • The field was dotted with the bright yellow blooms of Oenothera biennis.
  • Oenothera biennis is often found in disturbed soils and along roadsides.
  • Botanists study Oenothera biennis for its unique evening flowering habit.

Advanced Usage

• In Horticulture and Ecology: The term is used in scientific, botanical, and ecological contexts to precisely identify this specific plant species, distinguishing it from other plants in the genus.
  • The restoration plan includes seeding native species like Oenothera biennis.

Variants and Related Words

• Common Evening-Primrose (n): The standard common name for .
• Evening Primrose (n): A more general common name for plants in the genus, which includes .
• Biennial (adj/n): A plant that completes its life cycle in two years, a key characteristic of .

Synonyms

• Common evening-primrose: The primary synonym in common usage.
• Night willowherb: A less common alternative name used in some regions.

Notes on Meaning

• Scientific Name vs. Common Name: 'Oenothera biennis' is the formal, internationally recognized binomial name. It is used for accuracy in science, medicine (as the source of evening primrose oil), and specialized writing. In everyday conversation, "evening primrose" is more frequent.

Noun

1. a coarse biennial of eastern North America with yellow flowers that open in the evening; naturalized in Europe