Safflower
Sage
Sagebrush
Sagebrush Buttercup
Sagebrush Violet
Sageleaf Willow
Sago Pondweed
Saline Saltbush
Salt Heliotrope
Salt Sandspurry
Saltbush
Saltcedar
Saltgrass
Saltmeadow Rush
Sand Bluestem
Sand Dropseed
Sand Verbena
Sandbar Willow
Sandberg Bluegrass
Sandbur
Sandcherry
Sandgrass
Sandmat
Sandpuffs
Sandreed
Sandspurry
Sandwort
Sandyseed Clammyweed
Sanicle
Saskatoon Serviceberry
Sawsepal Penstemon
Sawtooth Sunflower
Sawtooth Wormwood
Scabiosa
Scaldweed
Scarlet Beeblossom
Scarlet Globemallow
Scentless False Mayweed
Scouringrush Horsetail
Scrambled Eggs
Scratchgrass
Scurfpea
Sea Milkwort
Seaside Arrowgrass