Spring Coral-root, 58
Spring-tape, 20
Spruce Pine, 18
Staghorn Clubmoss, 10
Star Duckweed, 46
Star-grasses, 54
Stemonaceae, 51
Stenanthium, 52
Stenochlaena, 15
Stenochlaena, 14
Stenophyllus, 37
Stenorrhynchus, 61
Stenotaphrum, 36
Stinkgrass, 26
Stipa, 36
Strap Ferns, 13
Striped Air-plant, 48
Sugarcane, 34
Sugarcane Plumegrass, 27
Sunnybells, 52
Swamp Fern, 13
Swamp-lily, 54
Sweet Tanglehead, 28
Switch Cane, 23
Switchgrass, 32
Sword Fern, 14
Sword Ferns, 14
Syngonanthus, 48
Syntherisma, 25, 26
Syringodium, 19

Tall Redtop, 36
Tanglehead, 28
Taxaceae, 17
Taxodiaceae, 18
Taxodium, 18
Taxus, 17
Tectaria, 15
Teosinte, 27
Texas Bluegrass, 33
Thalassia, 21
Thalia, 57
Thatch Palm, 46
Thelypteris, 15
Thelypteris, 14, 16
Themeda, 36
Three-awns, 22
Three-square Bulrush, 44
Thrinax, 46
Ticklegrass, 21
Tillandsia, 48
Tipularia, 62


Toad Rush, 50
Tofieldia, 52
Toothache Grass, 25
Torpedo Grass, 31
Torreya, 17
Tracheophyta, 10
Tracyanthus, 53
Tradescantella, 49
Tradescantia, 49
Tree Fern, 13
Triantha, 52
Trichachne, 36
Tricholaena, 34
Trichomanes, 12
Tridens, 36
Triglochin, 20
Trillium, 52
Triodia, 36
Triorchos, 59
Triphora, 62
Triplasis, 36
Tripogandra, 50
Tripsacum, 36
Trisetum, 36
Trismeria, 16
Tropidia, 62
Tufted Lovegrass, 26
Tumion, 17
Turk's-cap Lily, 51
Turtle-grass, 21
Twayblade, 60
Typha, 18
Typhaceae, 18

Umbrella Sedge, 39
Uniola, 37
Uniola, 24
Uvularia, 53

Vallisneria, 21
Valota, 36
Vanilla, 62
Vanilla, 62
Vasey Grass, 33
Venus'-hair Fern, 13
Veratrum, 53
Vine Fern, 14
Virginia Dropseed, 36
Vittaria, 16

Wakerobins, 52
Wandering Jew, 50