Shrimp Bush Shrimp Plant
Shrimp Plant, Golden Shrimp Plant, Mexican
Shrimp Plant, Snow Shrimp Plant, Yellow
Shrub Verbena 'Bante Rossa' Shrubby Germander
Shuttlecock Fern Siam Tulip
Siberian Bluebells Siberian Bugloss (spp.)
Siberian Bugloss 'Hadspen Cream' Siberian Bugloss 'Jack Frost'
Siberian Bugloss 'Langtrees' Siberian Bugloss 'Langtrees ('Aluminum Spot')'
Siberian Bugloss Variegated Siberian Catnip
Siberian Culver's Root Siberian Graybeard
Siberian Iris (spp.) Siberian Iris 'Baby Sister'
Siberian Iris 'Blue Reverie' Siberian Iris 'Butter and Sugar'
Siberian Iris 'Caesar's Brother' Siberian Iris 'Dreaming Spires'
Siberian Iris 'Dreaming Yellow' Siberian Iris 'Haarswell Haze'
Siberian Iris 'Illini Charm' Siberian Iris 'Lewelyn & Pansy Purple'
Siberian Iris 'Little White' Siberian Iris 'Orville Faye'
Siberian Iris 'Ottawa' Siberian Iris 'Over in Gloryland'
Siberian Iris 'Pink Haze' Siberian Iris 'Silver Edge'
Siberian Iris 'Sultan's Ruby' Siberian Iris 'White Swirl'
Siberian Larkspur 'Blue Butterfly' Siberian Larkspur 'Blue Mirror'
Siberian Larkspur 'Connecticut Yankee' Siberian Larkspur 'Pennant'
Siberian Larkspur 'Summer Blues' Siberian Squill
Siberian Wallflower 'Sicillian' Sweet Marjoram
Sickle Fern Sickle Plant
Sierra Madre Lobelia Sierra Shooting Star
Signal Arm Grass 'Signum' Mealycup Sage
Sikkimensis Primrose (spp.) Sikkimensis Primrose 'Ceperly Hybrid'
'Silberfeder' Maiden Grass 'Silk and Honey' Daylily
Silk Grass 'Silk Stockings' Longbeak Arrowhead
Silkweed (spp.) Silkweed 'Red Butterfly'
Silkweed 'Silky Gold' Silkweed: syriaca
'Silky Gold' Tropical Milkweed 'Siloam Bo Peep' Daylily
'Siloam Bye Lo' Daylily 'Siloam Cinderella' Daylily
'Siloam Doodlebug' Daylily 'Siloam Double Classic' Daylily
'Siloam Edith Sholar' Daylily 'Siloam Fairy Mist' Daylily
'Siloam Irving Hepner' Daylily 'Siloam June Bug' Daylily
'Siloam Lilac Magic' Daylily 'Siloam Little Girl' Daylily
'Siloam Merle Kent' Daylily 'Siloam Peewee' Daylily
'Siloam Queens Toy' Daylily 'Siloam Rainbow Magic' Daylily
'Siloam Ralph Henry' Daylily 'Siloam Red Ruby' Daylily
'Siloam Ribbon Candy' Daylily 'Siloam Shocker' Daylily
'Siloam Show Girl' Daylily 'Siloam Special' Daylily
'Siloam Sue Mills' Daylily 'Siloam Sunday Best' Daylily
'Siloam Tee Tiny' Daylily 'Siloam Tinker Toy' Daylily
'Siloam Tiny Tears' Daylily 'Siloam Tiny Tim' Daylily
'Siloam Ury Winniford' Daylily 'Siloam Virginia Henson' Daylily