Saguaro Cactus Sailor Caps
'Saint Mary' Southern Magnolia Salal
Sallow Sedge Salt Bush
Salvia, Blue (spp.) Salvia, Blue 'Argent'
Salvia, Blue 'Strata' Salvia, Blue 'Victoria Blue'
Salvia, Rosebud (spp.) Sampson, Black (spp.)
Sampson, Black 'Bright Star' Sampson, Black 'Kim's Knee High'
Sampson, Black 'Kim's Mophead' Sampson, Black 'Magnus'
Sampson, Black 'Ruby Star' Sampson, Black 'White King'
Sampson, Black 'White Swan' 'Samuel Sommer' Southern Magnolia
San Miguel Mountain Sage Sand Cord Grass
Sand Dollar Cactus Sand Live Oak
Sand Pine Sand Strawberry (spp.)
Sandberry (spp.) Sandberry 'Massachusetts'
Sandberry 'Microphylla' 'Sanders Blue' White Spruce
Sandhill Sage (spp.) Sandhill Sage 'David's Choice'
Sandmat Manzanita 'Sandra' Summer Phlox
'Sandra' Vernal Witchhazel 'Santa Ana Cardinal' Alumroot: Heuchera
'Santa Ana' Ceanothus: hybrid Santa Barbara Ceanothus (spp.)
Santa Barbara Ceanothus 'Vandenberg' Santa Fe Phlox
Santa Lucia Fir Santa Maria
'Santa Rosa' Laurel Magnolia Sanvitalia, Trailing (spp.)
Sanvitalia, Trailing 'Irish Eyes' Sanvitalia, Trailing 'Mandarin Orange'
Sapodilla 'Sapphire' Bushy Aster
'Sarah Eve' Virginia Sweetspire 'Sargentii' Canadian Hemlock
'Sargentii' Ohio Buckeye Saskatoon Serviceberry (spp.)
Saskatoon Serviceberry 'Regent' Sassafras
Sassafras, Common Satin Flower (spp.)
Satin Flower 'Dwarf Mix Improved' Satin Leaf
'Satinleaf' Southern Magnolia Satinwood
'Saturnalia' Virginia Sweetspire 'Satyr Hill' American Holly
Saw Palmetto Sawsepal Penstemon
Saxifrage, Aizoon Saxifrage, Lifelong
Saxifrage: davurica Scarlet Bouvardia
Scarlet Bugler (spp.) Scarlet Bugler 'Rondo'
Scarlet Bush Scarlet Clematis 'Duchess of Albany'
'Scarlet Flame' Moss Phlox Scarlet Monkey Flower
Scarlet Oak Scarlet Plume (spp.)
Scarlet Plume 'Alba' Scarlet Rose Mallow
Scarlet Sage (spp.) Scarlet Sage 'Lady in Red'
'Scarlett O'Hara' Winterberry: verticillata Schefflera (spp.)
Schefflera 'Amate™' 'Schilling's Dwarf' Yaupon Holly
'Schlesingeri' Red Maple 'Schnittlauch' Chives
'Schottii' Eastern Red Cedar Schrub Pine
'Schubert' Chokecherry Scorpion Grass
Scotch Purse Scouring Rush
Scrambled Eggs Scrub Live Oak
Scrub Pine Scuppernong