Botanical name: Erythrophysa transvaalensis
Common names: Transvaal Red Balloon, Fagara
Family: Sapindaceae
Origin: South Africa
USDA Plant Hardiness Zone Map
The fruit is a large, balloon-like structure, three-angled, with three chambers; each chamber contains 1 or 2 large, round, smooth black seeds.
Similar plants: Erythrophysa transvaalensis (Transvaal Red Balloon)
Link to this plant:
https://toptropicals.com/catalog/uid/erythrophysa_transvaalensis.htm