Pinguicula 'Pirouette' is the name for a cultivar, not the name of a hybrid, generally CP hybrids are not given names, but often destinct clones (unique individual plants - species or hybrids) can be propagated and registered as cultivars. You can find out more about
Pinguicula 'Pirouette' at:
http://www.omnisterra.com/bot/cp_home.cgi and you can see photographs here:
http://www.humboldt.edu/~rrz7001/Pinguicula.html
and there is a discussion of cultivation techniques here:
http://www.omnisterra.com/botany/cp/slides/pings/pings.htm
The cultivar description in the CP Database will usually let you know what size the cultivar can attain. In my collection this cultivar usually grows to about 6-8" in diameter. Again, though it originated by hybridization, it is misleading to simply call it a hybrid, the name
Pinguicula 'Pirouette' refers to a cultivar (cultivated variety), which would be any plant that exactly matches the published cultivar description and photographic standard, regardless of origins. Conceivably a plant matching this cultivar could be produced using entirely different parents.
Using an "X" as a prefix in the name to indicate the plant is of hybrid origins is outdated terminology and is no longer correct.
CP hybrids are denoted by hybrid formula, e.g. (
Pinguicula agnata x
Pinguicula gypsicola), [(
Pinguicula esseriana x
Pinguicula moranensis) x
Pinguicula agnata], and it is perfectly acceptable to use registered cultivar names if they are involved in creating hybrids, e.g.
Pinguicula 'Pirouette' x
Pinguicula ehlersiae.