Sneeze Weed, 128

Sneezewort, 131

Snowberry, 85, 111

Soapberry Family, 70

Soapwort, 34

Solanaceae, 100

Solanum, 100

Solidago, 125-127

Solomon's Seal, 11

Sorbaria, 57

Sorrel, Red, 25

Sorrel, Green, 25

Sorrel, Wood, 64

Sour Dock, 26

Sour Gum, 83

Southernwood, 119

Sparganiaceae, 2

Spartina, 5

Spear Grass, 7

Spearmint, 98

Spearwort, 36

Speckled Alder, 22

Specularia, 112

Speedwell, 105

Spergula, 32

Spergularia, 32

Spice Bush, 41

Spiderwort, 9

Spiderwort Family, 9

Spikenard, 80

Spike Rush, 7

Spiraea, 53

Spiranthes, 16

Spirodela, 9

Spotted Wintergreen, 85

Spurge, 67, 68

Spurge Family, 66

Spurred Gentian, 89

Spurrey, 32

Spring Avens, 56

Spring Beauty, 34

Spring Vetch, 59

Spruce, 1

Squashberry, 111

Squaw-root, 106

Squaw Weed, 128

Squirrel Corn, 41

Squirrel-tail, 4

Stachys, 99

Staff Tree Family, 69

Staphylea, 69

Staphyleaceae, 69

Star Flower, 87

Star Grass, 14

Star of Bethlehem, 14

Starry Campion, 33

Steironema, 88

Stellaria, 32, 33

Stemless Lady's Slipper, 18

Stickseed, 94

Stinging Nettle, 24

Stitchwort, 32

St. John's-wort, 73, 74

St. John's-wort Family, 73

Stone Clover, 61

Stonecrop, 48

Stonecrop, Ditch, 49

Stork's-bill, 64

Strawberry, 56

Strawberry, Barren, 55

Strawberry Blite, 29

Streptopus, 11

Striped Maple, 70

Strophostyles, 58

Stylophorum, 41

Sugar Maple, 70

Sumach, 68, 69

Summer Grape, 72

Summer Savory, 97

Sundew, 48

Sundew Family, 48

Sundrops, 78

Sunflower, 128-130

Sunflower, Tickseed, 124

Swamp Birch, 22

Swamp Currant, 49

Swamp Dewberry, 53

Swamp Laurel, 85

Swamp Milkweed, 91

Swamp Rose, 52

Swamp Valerian, 111

Swamp White Oak, 23

Sweet Birch, 22

Sweetbrier, 52

Sweet Cicely, 82

Sweet Fern, 20

Sweet Flag, 8

Sweet Gale, 21

Sweet Gale Family, 20

Sweet White Violet, 76

Sweet William, 34, 92

Sweet William Catchfly, 34

Sycamore, 51

Symphoricarpos, 110, 111

Symphytum, 93

Symplocarpus, 8

Synthyris, 102

Syringa, 88

Taenidia, 81

Tall Dock, 26

Tamarack, 1

Tanacetum, 119

Tansy, 119

Tansy Mustard, 43

Taraxacum, 115

Taxaceae, 2

Taxus, 2

Tear-thumb, 28

Teasel, 112

Teasel Family, 112

Tephrosia, 60

Teucrium, 97

Thalictrum, 39

Thaspium, 81

Thistle, 117, 118

Thistle, Canada, 118

Thistle, Cotton, 118

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