Lilies certainly have a high rank among the groups of plants with the most cultivated (named) selections, with over 3000 entries in the RHS Horticultural Database. If anyone has the inclination to do so, it’d make for an interesting discussion in the comments about which genera have the most cultivars, particularly by plant groups (trees, shrubs, conifers specifically, etc.).
Despite the number of cultivars, lily breeding has only been done on a mass scale during the past century; most cultivars have been developed from the 1970s onwards. This has been largely due to the incorporation of embryo rescue into breeding programs. Read Horticulture magazine’s account of Super Hybrid Lilies for more on the history of lily breeding as well as discussion about the different “types” of lilies. Wikipedia also has good descriptions of the latter: Classification of Garden Forms of Lilies.
Lilium ‘Patricia’s Pride’ falls within “Division 1”, or the Asiatic lily hybrids. This means that the genetic parentage for this cultivar is derived from a cluster of species (and interspecific hybrids) from central and eastern Asia. Within the Asiatic lilies, ‘Patricia’s Pride’ lily falls among another informal grouping, the “Brushmark” lilies, so named because of their “short, vivid dark streaks in their flowers’ centres” (via Horticulture magazine). And, because it intrigues me to write this: Lilium ‘Patricia’s Pride’, with its Asian-origin parentage, was bred in Oregon, USA
by the Scottish-born famous lily enthusiast, Edward McRae (additional memorial here, starting on page 83: Lilies 2009-2010 Yearbook). edit: I’m not certain where I made that conclusion from, but this was clearly hybridized by the Minnesotan Julius Wadekamper (as discussed in this set of his recollections, under the name ‘Purple Reign’) Thanks Riz for flagging this in this comments! end edit. Today’s photograph was taken in Italy.