Cuphea carthagenensis (Tarweed)
Cuphea carthagenensis purple flower rests among soft green leaves on the stem
Botanical name: Cuphea carthagenensis
Common names: Tarweed, Colombian Cuphea, Colombian Waxweed
Family: Lythraceae
Origin: Tropical America
USDA Plant Hardiness Zone Map
Annual or perhaps short-lived perennial herbs, sometimes slightly woody at base.
Similar plants: Cuphea carthagenensis (Tarweed)
Link to this plant:
https://toptropicals.com/catalog/uid/cuphea_carthagenensis.htm