 Bidens cernua (Nodding Bur-Marigold) |
 Bidens connata (Swamp Beggar-Ticks) |
 Bidens discoidea (Small Beggar-Ticks) |
 Bidens frondosa (Common Beggar-Ticks) |
 Bidens vulgata (Leafy-Bracted Beggar-Ticks) |
 Blephilia hirsuta (Hairy Wood Mint) |
 Boechera canadensis (Sicklepod) |
 Boechera laevigata (Smooth Rock Cress) |
 Boehmeria cylindrica (False Nettle) |
 Bolboschoenus fluviatilis (River Bulrush) |
 Boltonia asteroides (False Aster) |
 Brachyelytrum species (Shorthusk) |
 Brasenia schreberi (Water-Shield) |
 Bromus latiglumis (Ear-Leaved Brome) |
 Buchnera americana (American Bluehearts) |
 Bulbostylis capillaris (Tufted Hair Sedge) |
 Cabomba caroliniana (Carolina Fanwort) |
 Cakile edentula (Sea-Rocket) |
 Cakile edentula (Sea-Rocket) - Pale Flowers |
 Calamagrostis coarctata (Nuttall’s Reed Grass) |
 Calla palustris (Wild Calla) |
 Callitriche heterophylla (Large Water-Starwort) |
 Calopogon tuberosus (Grass-Pink) |
 Caltha palustris (Marsh Marigold) |
 Calycanthus floridus (Carolina All-Spice) |
 Calypso bulbosa (Fairy-Slipper) |
 Calystegia sepium (Hedge Bindweed) |
 Calystegia sepium (Hedge Bindweed) - White Flower |
 Calystegia spithamaea (Upright Bindweed) |
 Camassia scilloides (Wild Hyacinth) |
 Camassia scilloides (Wild Hyacinth) - White Flowers |
 Campanula americana (Tall Bellflower) |
 Campanula aparinoides (Bedstraw Bellflower) |
 Campanula rotundifolia (Harebell) |
 Campsis radicans (Trumpet Creeper) |
 Capnoides sempervirens (Rock Harlequin) |
 Cardamine angustata (Slender Toothwort) |
 Cardamine bulbosa (Spring Cress) |
 Cardamine concatenata (Cut-Leaved Toothwort) |
 Cardamine diphylla (Two-Leaved Toothwort) |
 Cardamine douglassii (Purple Cress) |
 Cardamine maxima (Large Toothwort) |
 Cardamine pensylvanica (Pennsylvania Bittercress) |
 Cardamine pratensis (Cuckoo-Flower) |
 Carex comosa (Long-Haired Sedge) |
 Carex crinita (Fringed Sedge) |
 Carex cristatella (Crested Sedge) |
 Carex cryptolepis (Northeastern Sedge) |
 Carex folliculata (Long Sedge) |
 Carex frankii (Frank's Sedge) |