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Webster 1913 Edition

Noun.

(Bot.)

A tropical leguminous bush (

Poinciana pulcherrima

, or

Cæsalpinia, pulcherrima

) with prickly branches, and showy yellow or red flowers; – so named from its having been sometimes used for hedges in the West Indies.

Baird.

Noun.

The name of certain plants. The flower-fence of Barbados is of the genus Poinciana. The bastard flower-fence is the Adenanthera.

flower-fence ‎(plural flower-fences)

A tropical leguminous bush (Poinciana or Caesalpinia pulcherrima) with prickly branches and showy yellow or red flowers.
- 1858, William Baird, The Student's Natural History
  Barbadoes flower-fence. Parkinsonia and Poinciana.