Kyslitsa (Oxalis) with purple leaves (10 nodules), Kherson region.

An indoor plant that can be grown in open ground (dug up for the winter).
Sorrel (Oxalis) is triangular, with purple leaves and lilac flowers.
10 tubers = 50 hryvnias.

In the summer, the plant feels great in the fresh air (it grows in my garden).
Unpretentious, does not hurt anything.(//tractor-service.com)
Long flowering period - until frost.
In the cold period of the year, a flower in a pot goes into hibernation (rest period).

There is also oxalis with green leaves and white flowers:

Novaya pochta or Ukrpochta.
Kherson (Meduchilyshcha district).