| 1960 | ZANTHA | Fay 1947/x | TB | 36 | E | Self | Intense, deep golden yellow (bright yellow, darker streak down F.), B:orange | 4.00 |
| 116 | ZEBRA | Harrison /1937 | TB | 30 | EM | Self | Novelty: I pallida spec., light blue; small flower, varigated creamy yellow and green leaves, very showy | 5.00 |
| 707 | ZOE | Woodside 1973/74 | TB | 29 | M | Self | Heavily ruffled pale pink with cream flush on F, B:tangerine | 5.00 |
| 389 | ZOMBIE | Craig 1957/57 | TB | 36 | ML | Self | Deep wine-red, white with lines at haft, B:burnt yellow | 4.00 |
| 978 | ZOUNDS | Blyth 1983 | SDB | 13 | E-L | Bicolor | S:vivid blue-lilac, F:brown-tan, blended olive, B:light blue | 3.00 |
| 1337 | ZOWIE | Boushay 1980 | SDB | 9 | E | Bicolor | Flashy white with a bright yellow spot on falls | 3.00 |
| 1843 | ZUA | Crawford /1914 | IB | 24 | E | Self | Unusual crinkled white petals, sport of Florentina. | 5.00 |
| 2398 | ZWANENBURG | Denis 1912/12 | IB | 13 | EE | Bitone | 5.00 |