| Shoo Fly Plant |
Nicandra physalodes |
 |
| Shooting Star |
Dodecatheon |
 |
| Shower Tree (many) |
Cassia |
|
| Shrubby Dillenia |
Dillenia suffruticosa |
|
| Shrubby Flax |
Linum arboreum |
 |
| Shrubby Penstemon |
Penstemon fruticosus |
|
| Siberian Iris |
Iris sibirica |
 |
| Siberian Lily |
Ixiolirion |
|
| Silk Floss Tree |
Chorisia speciosa |
 |
| Silk Tree |
Albizia julibrissin |
 |
| Silk Tree, Pink |
Albizia julibrissin f rosea |
|
| Silky Oak (many) |
Grevillea |
|
| Silky Oak |
Grevillea robusta |
|
| Silver Birch |
Betula utilis |
|
| Silver Sage |
Salvia argentea |
|
| Silver Yarrow |
Achillea clavennae |
|
| Silvery Dwarf Harebell |
Edraianthus pumilio |
|
| Skullcap |
Scutellaria |
|
| Skullcap |
Scutellaria galericulata |
|
| Sleeping Beauty |
Oxalis corniculatus |
|
| Sleeping Hibiscus |
Malvaviscus drummondii |
|
| Slipper Flower |
Calceolaria mexicana |
|
| Small Beggarticks |
Bidens ferulifolia |
|
| Small-flowered Phacelia |
Phacelia dubia |
|
| Snail Vine |
Vigna caracalla |
|
| Snake Vine |
Hibbertia scandens |
|
| Snapdragon |
Antirrhinum majus |
|
| Sneezeweed |
Helenium autumnalis |
|
| Snow Banana |
Musa glauca |
|
| Snow in Summer |
Cerastium tomentosum |
|
| Snow on the Mountain |
Euphorbia marginata |
|
| Snowbell |
Soldanella |
|
| Soapwort (many) |
Saponaria |
|
| Soapwort |
Saponaria ocymoides |
|
| Sorrel (many) |
Oxalis |
|
| Sorrel |
Oxalis lactea |
|
| South African Foxglove |
Ceratotheca triloba |
|
| Southern Beech |
Nothofagus dombeyii |
|
| Southern Star |
Oxypetalum (Tweedia) caerulea |
|
| Spanish Flag |
Ipomoea lobata |
|
| Spanish Lavender |
Lavandula stoechas |
|
| Spanish Snapdragon |
Antirrhinum sempervirens |
|
| Speedwell (many) |
Veronica |
|
| Speedwell |
Veronica fruticulosa |
|
| Speedwell, Silver |
Veronica incana |
|
| Speedwell |
Veronica schmidtiana |
|
| Spider Flower (many) |
Cleome |
|
| Spider Flower |
Cleome hassleriana (spinosa) |
|
| Spindle Tree |
Euonymus europaeus |
|
