| Rating | Plant | Thumbnail |
| Species Iris 'Z Z Zanzibar'
Iris variegata
Hybridized by Kasperek, 2005 |  |
| Tall Bearded Iris 'Zaggeran'
Iris
Hybridized by Burseen, 1997 |  |
| Tall Bearded Iris 'Zaida'
Iris
Hybridized by Wallace, 1965 | |
| Tall Bearded Iris 'Zak'
Iris
Hybridized by L. Johnson, 2006 | |
| Spuria Iris 'Zamboanga'
Iris
Hybridized by B. Hager, 1991 | |
 | Tall Bearded Iris 'Zandria'
Iris
Hybridized by Nebeker, 1995 |  |
| Tall Bearded Iris 'Zantha'
Iris
Hybridized by Fay, 1947 |  |
| Tall Bearded Iris 'Zany'
Iris
Hybridized by Dunn, 1987 |  |
| Standard Dwarf Bearded Iris 'Zap'
Iris
Hybridized by Black, 2003 |  |
| Standard Dwarf Bearded Iris 'Zarosshi Prud'
Iris
Hybridized by Loktev, 2001 | |
| Tall Bearded Iris 'Zaton'
Iris
Hybridized by Dyer, 1998 |  |
| Spuria Iris 'Zeal'
Iris
Hybridized by Hager, 1979 | |
| Tall Bearded Iris 'Zebedee'
Iris
Hybridized by Jameson, 1992 | |
| | Tall Bearded Iris 'Zebra'
Iris
Hybridized by Harrison, 1937
Additional info: (aka Pallida Variegata, Pallida Argentea Variegata) |  |
| Tall Bearded Iris 'Zebra Bluez'
Iris
Hybridized by Kasperek, 2001 | |
| Tall Bearded Iris 'Zebra Blush'
Iris
Hybridized by Kasperek, 1993 |  |
| Tall Bearded Iris 'Zebra Halo'
Iris
Hybridized by Kasperek, 1996 | |
| Tall Bearded Iris 'Zebra Jam'
Iris
Hybridized by Kasperek, 2001 | |
| Tall Bearded Iris 'Zebra Milk'
Iris
Hybridized by Kasperek, 2001 | |
| Tall Bearded Iris 'Zebra Night'
Iris
Hybridized by Kasperek, 1996 | |
| Tall Bearded Iris 'Zee'
Iris
Hybridized by D. Spoon, 2004 | |
| Border Bearded Iris 'Zeeland'
Iris
Hybridized by Scopes, 1984 | |
| Tall Bearded Iris 'Zekie'
Iris
Hybridized by D.Spoon, 2007 |  |
| Arilbred Iris 'Zemira'
Iris
Hybridized by Rich, 1979 |  |
| Tall Bearded Iris 'Zepherina'
Iris
Hybridized by Maryott, 1995 |  |
| Standard Dwarf Bearded Iris 'Zero'
Iris
Hybridized by Keppel, 1997 |  |
| | Arilbred Iris 'Zerzura'
Iris
Hybridized by Ben Hager, 1989 |  |
| Border Bearded Iris 'Zestful Miss'
Iris
Hybridized by Hamner, 1994 |  |
| Tall Bearded Iris 'Zesting Lemons'
Iris
Hybridized by R. Ernst, 2008 | |
| Tall Bearded Iris 'Zesty'
Iris
Hybridized by Roach, 1976 | |
| Tall Bearded Iris 'Zetta Laws'
Iris
Hybridized by Grise, 2002 | |
| Border Bearded Iris 'Zia Ida'
Iris
Hybridized by Bianco, 2003 | |
| Tall Bearded Iris 'Ziggy'
Iris
Hybridized by V. Keyser, 1997 |  |
| Tall Bearded Iris 'Zillionaire'
Iris
Hybridized by Blyth, 1996 |  |
| Intermediate Bearded Iris 'Zimni Sad'
Iris
Hybridized by Loktev, 2003 | |
| Tall Bearded Iris 'Zin City'
Iris
Hybridized by Feuerstein, 2008 | |
| Border Bearded Iris 'Zinc Pink'
Iris
Hybridized by Ensminger, 1986 |  |
| Standard Dwarf Bearded Iris 'Zing'
Iris
Hybridized by Brizendine, 1960 | |
| | Intermediate Bearded Iris 'Zing Me'
Iris
Hybridized by Blyth, 1990 |  |
| Border Bearded Iris 'Zingerado'
Iris
Hybridized by Baumunk, 2004 |  |
