Botanical name: Erythrochiton brasiliensis
Common name: Star of Brazil
Family: Rutaceae
Origin: Brazil, Peru
USDA Plant Hardiness Zone Map
A small treelet from South America, grows to eight feet tall, producing white flowers with a showy red calyx all year. It is super slow growing and is a great choice as a rare specimen for container garden.
Link to this plant:
https://toptropicals.com/catalog/uid/erythrochiton_brasiliensis.htm