How Many Bearded Iris Cultivars Are Registered?

The American Iris Society (AIS) maintains the official registry of bearded iris cultivars. As of the latest count, 63,367 named cultivars have been registered since record-keeping began.

Breakdown by Class (1950–Present)

While pre-1950 records aren't fully digitized, post-1950 registrations are categorized as follows:

• Tall Bearded: 26,863
• Border Bearded: 1,463
• Intermediate Bearded: 1,749
• Standard Dwarf Bearded: 4,184
• Miniature Tall Bearded: 604
• Miniature Dwarf Bearded: 951
• Arilbreds: 1,584

Why So Many?

Irises are incredibly diverse and hybridize readily. Breeders continuously create new combinations of color, form, bloom time, and disease resistance. Each distinct, stable cultivar can be registered with the AIS, which ensures naming consistency and preserves horticultural history.

Resources for Enthusiasts

Visit the American Iris Society website for the searchable registry, cultivation guides, and local society contacts. Whether you're a collector, breeder, or casual gardener, the iris world offers endless variety.