Sorry, I can't help. I live too far north (Long Island) and they can't live here. All I know is they are in the orchid family. They are a protected plant and so tender I believe it's illegal to sell them in New York. Good luck with yours-I hope someone has good advice for you. And Happy Valentine's Day!

A small variety grows wild here in our wooded areas.
Quote form an orchid site:

These Paphiopedilum orchids have no water storing features like pseudobulbs.They are generally terrestrial, soil growing, growing in the shade of the forest floor or bogs where they can always be moist. So watering needs to be available constantly. Paphiopedilum orchid care requires that they be moist and never dry or soggy.

Paphiopedilums are unique, there are both warm and cool growing plants. Slipper orchid care will alter a little because of these two different types of Paphiopedilums. The warm growing need temperatures from 60 - 65 F. degrees to 75 -85 F. degrees. Whereas the cool growing orchid Paphs. need temps from 50 - 55 F.all the way up to 75 - 80 F. degrees. These orchids can also do well with a constant temperature and the cool growing ones can stand temperatures into the 40's if needed for a short time.

Those Paphiopedilums which have green leaves are usually the cool climate ones, while those with mottled leaves are warm growing ones.

As most orchids, lady slipper orchids require humidity between 40 - 60%, remember they usually grow on the rain forest floor. This may need to be augmented by using humidity trays. You can get a flat tray with sides. Fill the tray with stone pebbles and then add water about half way up. Place the plant on the tray making sure that the slipper orchid roots are not touching the water. If it does there is a good chance for root rot.

I've never seen or heard of anything called Ladys Slipper plants being sold as potted plants. It looks like it 'could' be a number of cultivars, with various conditions and needs. What color are the blooms? Got a pic?

From the link below:
Cypripedium is a genus of 47 species of lady's-slipper orchids native to temperate and colder regions of the Northern Hemisphere.

If you can get a pic, you might try posting at The Name That Plant Forum. Several members there are really good at naming different cultivars of various plants.

Here is a link that might be useful: Cypripedium