Common Cattail, 18
Common Dayflower, 49
Common Duckweed, 46
Common Pipewort, 48
Common Spiderwort, 49
Common Star-grass, 54
Common Yellow-eyed-grass, 47
Coontie, 17
Corallorhiza, 58
Corallorrhiza, 58
Coral-roots, 58
Cordgrasses, 35
Cordyline, 55
Coridochloa, 25
Cowhorn Orchid, 58
Crabgrasses, 25
Cranichis, 58
Creeping Burhead, 20
Creeping Fern, 16
Cretan Brake, 15
Crinum, 54
Crocosmia, 55
Croomia, 51
Crowfoot Grass, 25
Crow-poison, 53
Ctenitis, 13
Ctenium, 25
Cupressaceae, 18
Curly-grasses, 12
Curly-grass Family, 12
Curlyleaf Pondweed, 19
Cutgrasses, 28
Cuthbertia, 50
Cycadaceae, 17

Cyclopogon, 61
Cymodocea, 19
Cynodon, 25
Cyperaceae, 37
Cyperus 39
 Cypress Family, 18
 Cypress-pine, 18
 Cyrtomium, 14
 Cyrtopodium, 58

 Dactylis, 25
 Dactyloctenium, 25
 Dallis Grass, 32
 Danthonia, 25
 Darnel, 29
 Dayflowers, 49
 Dendropogon, 49


Dennstaedtia, 14
Diaphoranthema, 48
Dichromena, 41
Dicranopteris, 12
Digitaria, 25
Dimorphic Chain Fern, 14
Dioscorea, 55
Dioscoreaceae, 55
Diplanthera, 19
Diplostachyum, 10
Distichlis, 26
Ditch-grass Family, 19
Dogtooth-violet, 51
Dollar Orchid, 58
Dropseeds, 35
Dryopteris, 14
Dryopteris, 13, 16
Duckweed Family, 46
Duckweeds, 46
Dulichium, 41
Dune Sandspur, 24
Dwarf Banana, 56
Dwarf Burhead, 20
Dwarf Iris, 56

Easter-lily, 54
Ebony Spleenwort, 13
Echinochloa, 26
Echinodorus, 20
Eelgrass, 21
Eichhornia, 50
Eleocharis, 41
Eleusine, 26
Elliott Beardgrass, 22
Elodea, 21
Elymus, 26
Elyonurus, 26
Encyclia, 58
Engelmann's Adder's-tongue, 11
Epicladium, 58
 Epidendrum, 59
 Equisetaceae, 11
 Equisetum, 11
 Eragrostis, 26
 Erect Burhead, 20
 Eremochloa, 27
 Erianthus, 27
 Eriocaulaceae, 47
 Eriocaulon, 47
 Eriochloa, 27
 Erythrodes, 59
 Erythronium, 51