ABCDEFGHIJKLMNOPQRSTUVWXYZ
In the following list, cultivar names have been recorded without attribution or description and additional information is unavailable at the time of going to print.
History or knowledge of these cultivars should be sent to the Registrar for inclusion in the Addendum.
S- ‘Stanley H.M’
- ‘Star Red’
- ‘Star Rite’
- ‘Star Wright’
- ‘Starlight Orange’
- ‘Statasky’
- ‘Steenhood’
- ‘Stella Variegata’
- ‘Stella’s Pouse’
- ‘Stewartii’
- ‘Stormy Morning’
- ‘Striata Formossisima’
- ‘Stuttgardia’
- ‘Styx’
- ‘Sue Cook’
- ‘Sully Prudhomme’
- ‘Sulphur Queen’
- ‘Sun Valley’
- ‘Sunfly’
- ‘Sunset Gleam’
- ‘Super Alice’
- ‘Surpass Orange Nosegay’
- ‘Surpasse M. Garth’
- ‘Susan Gray’
- ‘Swedish Delight’
- ‘Swedish Sweetheart’
- ‘Sweet Girl Graduate’
- ‘Sweet Orange’
- ‘Sweet Violets’
- ‘Swordsman’
- ‘Sybil’
- ‘Sydonia’
- ‘Symetry’
T- ‘T.V. Red’
- ‘Talia’
- ‘Tarton’
- ‘Tasman’
- ‘Tasso’
- ‘Tempe’
- ‘Terance’
- ‘Teresa Baxter’
- ‘Terpsicore’
- ‘Tessie Sowerby’
- ‘Tessor’
- ‘Th. Schuler’
- ‘The Bouquet’
- ‘The Bronx’
- ‘The Dwarf’
- ‘The Fox’
- ‘The Marshall’