Plants with flowers not white, yellow, or green
 Pterospora andromedea (Pinedrops) |
 Pyrola asarifolia (Pink Wintergreen) |
 Rhaponticum repens (Russian Knapweed) |
 Ribes triste (Swamp Red Currant) |
 Rosa acicularis (Prickly Rose) |
 Rosa arkansana (Prairie Rose) |
 Rosa woodsii (Wood's Rose) |
 Rubus arcticus (Stemless Raspberry) |
 Rumex acetosella (Sheep's Sorrel) |
 Rumex venosus (Sand Dock) |
 Salicornia rubra (Red Samphire) |
 Salsola kali (Russian Thistle, Tumbleweed) |
 Sarcobatus vermiculatus (Greasewood) |
 Sarracenia purpurea (Purple Pitcherplant) |
 Scutellaria galericulata (Marsh Skullcap) |
 Scutellaria lateriflora (Blue Skullcap) |
 Shinnersoseris rostrata (Annual Skeleton Weed) |
 Sisyrinchium montanum (Blue-eyed Grass) |
 Solanum dulcamara (Bittersweet) |
 Spergularia salina (Sand Spurry) |
 Sphaeralcea coccinea (Scarlet Mallow) |
 Stachys palustris (Marsh Hedge-Nettle) |
 Stephanomeria runcinata (Rush Pink) |
 Stutzia dioica (Saline Saltbush) |
 Suaeda calceoliformis (Sea-Blite) |