I would like to identify this African violet variety. It has a tubular flower, and is striped white and purple.
This is not an African violet/Saintpaulia,though it is a relative - its Deinostigma tamiana, sometimes called Vietnamese violet. It remains quite small, flowers frequently, and its care regime is the same as that for African violet. Further information here http://everbloominghouseplants.com/primulina-tamiana-vietnamese-violet