It is a shrub growing to 3 m tall. In climates with few to no frosts, this plant will grow larger and is semievergreen. In Hawaii this plant is evergreen and grows over 5 m tall. Grown in climates with light to moderate freezing, it will die back to the ground during the winter, but will rebound in mid- to late spring. This species is more sensitive to cold than others.
The leaves are bipinnate, 20–40 cm long, bearing three to 10 pairs of pinnae, each with six to 10 pairs of leaflets 15–25 mm long and 10–15 mm broad. The flowers are borne in racemes up to 20 cm long, each flower with five yellow, orange, or red petals. The fruit is a pod 6–12 cm long.
Poinciana pulcherrima is a synonym of Caesalpinia pulcherrima.
Caesalpinia pulcherrima is the national flower of the Caribbean island of Barbados, and is depicted on the upper left and right corners of the Queen Elizabeth II's personal Barbadian flag.
All seeds of Caesalpinia are poisonous. However, the seeds of some species are edible before they reach maturity (e.g. immature seeds of C. pulcherrima) or after treatment (e.g. C. bonduc after roasting).
