"pings" are butterworts, after the genus name of Pinguicula (which
few people care to write or speak in common correspondance :-)).
They generally have large, flat, greasy leaves that trap small
gnats. The U.S. species are somewhat difficult to grow due to
their need for winter dormancy and their tendency to rot if
over watered, but some of the mexican species are very easy
to grow if you follow just a few basic rules. One of those
rules seems to be don't grow them in peat moss...
Robert