Definition

Noun: * Bidens bipinnata: A species of flowering plant in the aster family (Asteraceae), commonly known as Spanish needles or bipinnate beggarticks. It is an annual herb native to the Americas, characterized by its small yellow flowers and slender, barbed fruits (achenes) that readily attach to fur and clothing.

Usage

• The term "Bidens bipinnata" is used specifically as the botanical or scientific name for this plant species. It is the precise, formal identifier used in scientific, horticultural, and ecological contexts.
• In everyday language, people typically refer to this plant by its common names.

Examples

• Scientific/Formal Context:
  • The field was dominated by Bidens bipinnata, indicating disturbed soil.
  • A key identifying feature of Bidens bipinnata is its finely divided, bipinnate leaves.
• General Context (using the concept):
  • I had to pick dozens of Bidens bipinnata seeds off my socks after the hike. (Here, the scientific name specifies the exact plant.)

Advanced Usage

• The name is binomial, following the Linnaean system of taxonomy. "Bidens" is the genus name (capitalized), and "bipinnata" is the specific epithet (not capitalized). Together, they form the species name, which is always italicized in print.
• It can be used in compound adjectives, such as "a -infested area" or " propagation."

Variants and Related Words

• Common Names: Spanish needles, bipinnate beggarticks, blackjack, sticktight.
• Related Taxonomic Terms:
  • Genus: Bidens: The genus to which this species belongs, containing many other "beggarticks" or "bur marigolds."
  • Family: Asteraceae: The large plant family commonly known as the aster, daisy, or sunflower family.

Synonyms

• Scientific Synonym: In botanical history, a plant may have been classified under different names. is the currently accepted name, but older texts may use synonyms like .
• Common Name Synonyms: Spanish needles, beggarticks.

Notes on Meaning

• The primary meaning is strictly botanical, referring to this specific plant species. It does not have idiomatic or figurative meanings.
• The common names often reference the plant's troublesome, clinging seeds ("needles," "sticktight," "blackjack").

Noun

1. common bur marigold of the eastern United States