| 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 |  |