| Common name (English) | |
|---|---|
| Salvia microphylla | Baby Sage |
| Salvia officinalis | Common Sage |
| Salvia splendens | bonfire salvia |
| Sambucus racemosa | American red elderberry |
| Santolina chamaecyparissus | Lavender Cotton |
| Sapindus mukorossi | Chinese soapberry, North Indian Soapnut |
| Schinus terebinthifolia | Brazilian pepper-tree |
| Senna corymbosa | Argentine Senna |
| Setaria italica | Foxtail Bristle-Grass |
| Sicyos edulis | Choko |
| Silene noctiflora | Night-Scented Catchfly |
| Sisymbrium altissimum | Jim Hill mustard |
| Solanum elaeagnifolium | Silverleaf nightshade, Bull nettle |
| Solanum laciniatum | New Zealand nightshade, Kangaroo Apple |
| Spiroplasma citri | |
| Stapelia hirsuta | Carrion-flower |
| Stenotaphrum secundatum | St. Augustine grass |
| Stephanotis floribunda | |
| Sternbergia lutea | Winter daffodil, Autumn Daffodil |
| Strombocarpa pubescens | Screw-bean |