TROPICAL PLANT ENCYCLOPEDIA
Deinostigma tamiana, Primulina tamiana, Chirita tamiana
Vietnamese VioletFamily: 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.
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Link to this plant:
https://toptropicals.com/catalog/uid/deinostigma_tamiana.htm