Listed here are Hawaiian plant common names that begin with the letter S.
- Salad Fruit
- Sanchezia
- Sau, Moluccan
- Sawtooth Blackberry
- Scarlet Spiral Flag
- Schefflera
- Scotch Attorney
- Screw Pine
- Screwpine, Tahitian
- Screwpine, Textile
- Screwpine, Thatch
- Sea Bean
- Sea Grape
- Sea Hibiscus
- Seabean
- Seagrape
- Seaside Mahoe
- Seedbox
- Senna, Candlestick
- Senna, Ringworm
- Sensitive Plant
- Shameplant
- Shampoo Ginger
- Shell Ginger
- Shellflower
- Shellplant
- Sheoak, Beach
- Shoeblackplant
- Short Pitpit
- Showy Medinilla
- Shrimp Plant, White
- Signature Tree
- Silk Oak
- Silk-grass Goldenaster
- Silkoak
- Silky Oak
- Silky-oak, Australian
- Silver Geranium
- Silver Oak
- Singapore Daisy
- Singapore Graveyard Flower
- Singapore Plumeria
- Siratro
- Skeleton Hibiscus
- Skunk Vine
- Skunkvine
- Sleeping Hibiscus
- Sleepy Mallow
- Small Bush Violet
- Small Chinese Violet
- Small-flowered Nightshade
- Smartweed, Pinkhead
- Smooth Pricklypoppy
- Snakeweed
- Snapdragon, Brazilian
- Snow Bush
- Snowbush
- Soap Bush
- Soapbush
- Song of India
- Sorrel, Large-flowered Pink
- Sourbush
- Spanish Arborvine
- Spanish Woodbine
- Spiral Flag, Scarlet
- Spiral Ginger
- Spiral Ginger, Giant
- Split-leaf Philodendron
- Spreading Dayflower
- Squirrel Tail
- Squirrel's Tail
- Staghorn Clubmoss
- Staghorn, False
- Star Flower
- Star of Bethlehem
- Star-of-Bethlehem
- Stink Grass, Brazilian
- Stink Vine
- Stinkvine
- Strawberry Guava
- Sugar Cane
- Sugarcane
- Sumac, Hawaiian
- Sweet Clock-vine
- Swiss Cheese Plant