Botanical names: Deinostigma tamiana, Primulina tamiana, Chirita tamiana
Common name: Vietnamese Violet
Family: Gesneriaceae
Origin: Southeast Asia
Deinostigma tamiana makes a perfect terrarium plant. It's tiny, the flowers are large compared to the plant size, and it does like higher humidity.
Similar plants: Deinostigma tamiana (Vietnamese Violet)
Link to this plant:
https://toptropicals.com/catalog/uid/deinostigma_tamiana.htm