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Scientific Name Common Name(s) Plant Category Image
Sapium sebiferum Popcorn Tree Poisonous Plants
Saponaria officinalis Soapwort, bouncing-bet Herbs, Perennials, Poisonous Plants, Wildflowers
Sassafras albidum Sassafras Native Plants, Poisonous Plants, Trees
Scadoxus multiflorus (Haemanthus multiflorus) African blood lily, Blood lily, powderpuff lily Poisonous Plants
Schefflera spp. Australian umbrella tree, Schefflera, starleaf Poisonous Plants, Trees
Scilla campanulata (Endymion, Hyacinthoides) Spanish Blue-Bells, Wood Hyacinths Perennial Bulbs, Poisonous Plants, Spring Bulbs
Scilla siberica, S. tubergeniana Siberian Squill Poisonous Plants, Spring Bulbs
Scilla siberica, S. tubergeniana (S. mischtschenkoana) Siberian Squill Perennial Bulbs, Poisonous Plants
Scilla spp. Cuban lily, Siberian squill, Tubergen squill, Two-leaved squill, autumn scilla, blue squill Poisonous Plants
Scleroderma aurantium Earthball, Pigskin Poison Puffball Poisonous Plants
Scleroderma geaster Dead Man's Hand, Devils Snuff Box, Earthstar Scleroderma Poisonous Plants
Sedum 'Autumn Joy' Autumn Joy Sedum Perennials, Poisonous Plants
Sedum 'Matrona' Matrona stonecrop Groundcover, Poisonous Plants
Sedum acre Biting stonecrop, Gold-moss, Stonecrop Groundcover, Poisonous Plants
Sedum album White stonecrop Groundcover, Poisonous Plants
Sedum cauticola Groundcover, Poisonous Plants
Sedum kamtschaticum Kamschatka sedum, Orange stonecrop Groundcover, Poisonous Plants
Sedum lineare 'Variegatum' Variegated stonecrop Groundcover, Poisonous Plants
Sedum makinoi Groundcover, Poisonous Plants
Sedum middendorf Stonecrop Groundcover, Poisonous Plants
Sedum sieboldii October daphne Groundcover, Poisonous Plants
Sedum spectabile Ice plant, Showy stonecrop Groundcover, Poisonous Plants
Sedum spp. Sedum, Stonecrop, roseroot Groundcover, Perennials, Poisonous Plants
Sedum spurium Creeping stonecrop, Two-row stonecrop Groundcover, Poisonous Plants
Sedum spurium 'John Creech' John Creech sedum Groundcover, Poisonous Plants
Sedum ternatum Mountain stonecrop, Three-leaved stonecrop, Wild stonecrop Groundcover, Native Plants, Poisonous Plants, Wildflowers
Sedum tetractinum Chinese sedum Groundcover, Poisonous Plants
Sempervivum spp. Houseleek, live-forever, stonecrop Poisonous Plants
Senecio aureus Golden ragwort Poisonous Plants, Wildflowers
Senecio cineraria Dusty miller Annuals, Poisonous Plants
Senecio spp. Senecio, groundsel, squaw weed Poisonous Plants
Sesbania punicea (Daubentonia punicea) Rattlebox, false poinciana, purple sesbane Poisonous Plants
Skimmia japonica Japanese skimmia Poisonous Plants, Shrubs
Solandra spp. chalice vine, trumpet flower Poisonous Plants
Solanum americanum Nightshade Poisonous Plants
Solanum carolinense Horse nettle, wild tomato Poisonous Plants, Wildflowers
Solanum dulcamara Bittersweet, Deadly nightshade, European bittersweet, climbing nightshade Poisonous Plants, Vines
Solanum nigrum Black nightshade Poisonous Plants
Solanum pseudocapsicum Jerusalem cherry Perennials, Poisonous Plants
Solanum tuberosum Potato, irish potato, white potato Poisonous Plants
Solenostemon scutellarioides Coleus, painted nettle Annuals, Poisonous Plants
Sophora secundiflora Mescal bean Poisonous Plants
Sorghum halepense Johnsongrass Poisonous Plants
Sparmannia africana African hemp Poisonous Plants
Spathiphyllum spp. Peace lily, spathe flower Poisonous Plants
Spigelia marilandica Indian pink, pinkroot Poisonous Plants, Wildflowers
Streptopus amplexifolius Twisted stalk, White mandarin Poisonous Plants, Wildflowers
Streptopus spp. Twisted-stalk, mandarin, scootberry Poisonous Plants
Styphnolobium japonicum Chinese scholar tree, Japanese pagoda, Japanese pagoda tree Poisonous Plants, Trees
Symphoricarpos albus Common snowberry Poisonous Plants, Shrubs