Balsam Apple (see Cucumber, Wild/ Balsam Apple)
Bamboo, Japanese (see Knotweed, Japanese/ Japanese Bamboo)
Barberry, Japanese Berberis thunbergii Barberry
Basil Satureja vulgaris Mint
Basswood, American (see Linden, American)
Basswood, white Tilia heterophylla Linden
Bean, Wild Phaseolus polystachios Pea
Bear's head tooth fungus (see Hedgehog coral)
Beardtongue, Eastern (see Beardtongue, Hairy/ Eastern Beardtongue)
Beardtongue, Foxglove Penstemon digitalis Snapdragon (Figwort)
Beardtongue, Hairy/ Eastern Beardtongue Penstemon hirsutus Snapdragon (Figwort)
Bedstraw, Fragrant/ Sweet-scented Bedstraw Galium triflorum Bedstraw (Madder)
Bedstraw, Rough Gallium asprellum Bedstraw (Madder)
Bedstraw, shining Galium concinnum Bedstraw (Madder)
Bedstraw, Sweet-scented (see Bedstraw, Fragrant/ Sweet-scented Bedstraw)
Bee tree (see Basswood, white)
Bee-balm/ Oswego tea Monarda didyma Mint
Bee-Tree (see Linden, American)
Beech, American Fagus grandifolia Beech
Beech, Blue (see Ironwood)
Beech, Water (see Ironwood)
Beechdrops Epifagus virginianum Broomrape
Beggar's Lice (see Stickseed/ Beggar's-Lice)
Beggar-ticks, Devil's/ Sticktights Bidens frondosa E Miscellaneous
Beggar-ticks, Leafy-bracted Bidens comosa E Miscellaneous
Beggar-ticks, Swamp Bidens connata E Miscellaneous
Bellflower, Tall Campanula americana Bluebell
Bellwort, Large-flowered/ Big Merrybells Uvularia grandiflora Lily
Bellwort, Perfoliate Uvularia perfoliata Lily
Bellwort, Sessile (see Oats, Wild/ Sessile Bellwort/ Little Merrybells)
Benjamin Bush (see Spicebush, common)
Bergamot, Wild Monarda fistulosa Mint
Bindweed, field Convolvulus arvensis Morning Glory
Bindweed, Hedge/ Wild Morning Glory Convolvulus sepium Morning Glory
Bindweed, Low (see Bindweed, Upright/ Low Bindweed)
Bindweed, small (see Bindweed, field)
Bindweed, Upright/ Low Bindweed Convolvulus spithamaeus Morning Glory
Birch mazegill Lenzites betulina Mushrooms With Pores (Polypores)
Birch, Black Betula lenta Birch
Birch, Cherry (see Birch, Black)
Birch, European Weeping (see Birch, European White)
Birch, European White Betula pendula Birch
Birch, gray Betula populifolia Birch
Birch, red (see Birch, river)
Birch, river Betula nigra Birch
Birch, Silver (see Birch, European White)
Bird's-eye (see Speedwell, Bird's Eye)
Bishop's Cap (see Miterwort/ Bishop's Cap)
Bisquit batter Biscogniauxa atriopunctata Crusts And Slimes
Bittercress, Pennsylvania Cardamine pensylvanica Mustard
Bitternut (see Hickory, Bitternut)
Bittersweet, American/ Climbing bittersweet Celastrus scandens Staff-Tree
Bittersweet, Asiatic Celastrus orbiculatus Staff-Tree
Bittersweet, Climbing (see Bittersweet, American/ Climbing bittersweet)
Black-Eyed Susan Rudbeckia hirta Sunflower-Like
Blackberry Rubus allegheniensis Rose
Blackhaw (see Nannyberry)
Bladdernut, American Staphylea trifola Bladdernut
Blazing-Star, Dense/ Gay Feather Liatris spicata E Miscellaneous
Bleeding-heart, Wild Dicentra eximia Poppy
Blewit Clitocybe nuda Gilled Mushrooms
Bloodroot Sanguinaria canadensis Poppy
Blue eyed grass, stout Sisyrinchum angustifolium Iris
Blue-eyed Mary Collinsia verna Snapdragon (Figwort)
Bluebells, Virginia/ Virginia Cowslip/ Mertensia Mertensia virginica Forget-Me-Not/Borage
Blueberry, Canada (see Blueberry, Velvet leaf/ Canada Blueberry)
Blueberry, Early Low (see Blueberry, Low-bush)
Blueberry, Low Sweet (see Blueberry, Low-bush)
Blueberry, Low-bush Vaccinium angustifolium Heath
Blueberry, Velvet leaf/ Canada Blueberry Vaccinium myrtilloides Heath
Bluets/ Quaker-ladies Houstonia caerulea Bedstraw (Madder)
Blueweed (see Bugloss, Viper's/ Blueweed)
Blusher, eastern American Amanita ;amerirubescens Gilled Mushrooms
Bolete eater Hypomyces completus Miscellaneous Fungi
Bolete, bitter Tylopilus fellius Mushrooms With Pores (Polypores)
Bolete, ruby Boletus rubellus Mushrooms With Pores (Polypores)
Bolete, two colored Baorangia bicolor Mushrooms With Pores (Polypores)
Boneset, Blue (see Mistflower/ Blue Boneset)
Boneset, White (see Thoroughwort, White)
Boneset/ Thoroughwort Eupatorium perfoliatum Joe-Pye-Weed-Like
Borage Borago officinalis Forget-Me-Not/Borage
Bouncing Bet/ Soapwort Saponaria officinalis Pink
Bowman's Root/ Indian Physic Gillenia trifoliata Rose
Boxelder Acer negundo Maple
Bracken Pteridium latiusculum Fern
Bracket, beech (see Bracket, lumpy)
Bracket, black cherry Fomitopsis spraguei Mushrooms With Pores (Polypores)
Bracket, currycomb Daedaliopsis confragosa Mushrooms With Pores (Polypores)
Bracket, lacquered Ganoderma resinaceum Mushrooms With Pores (Polypores)
Bracket, lumpy Trametes gibbosa Mushrooms With Pores (Polypores)
Bracket, purple pore Trichaptum abietum Crusts And Slimes
British soldiers Cladonia cristatella Lichen
Brittlegill, stinking Russula fragrantissima Gilled Mushrooms
Brittlestem, pale (see Crumblecap, fringed)
Broadgill Megacollybia rodmani/Tricholomopsis platyphylla Gilled Mushrooms
Brown-eyed Susan Rudbeckia triloba Composite
Buckeye (see Horsechestnut)
Buckeye, Fetid (see Buckeye, Ohio)
Buckeye, Ohio Aesculus glabra Horsechestnut
Buckeye, Sweet (see Buckeye, Yellow)
Buckeye, Yellow Aesculus octandra Horsechestnut
Buckthorn, Alder (see Buckthorn, Glossy)
Buckthorn, Common Rhamnus cathartica Buckthorn
Buckthorn, European (see Buckthorn, Glossy)
Buckthorn, Glossy Rhamnus frangula Buckthorn
Buckwheat Fagopyrum sagittatum Buckwheat
Buckwheat, Climbing False Polygonum scandens Buckwheat
Bugbane (see Cohosh, Black/ Bugbane/ Black Snakeroot)
Bugle Ajuga reptans Mint
Bugle, Erect Ajuga genevensis Mint
Bugleweed, American (see Water-Horehound, Cut-Leaved/ American Bugleweed)
Bugleweed, Virginia Lycopus virginicus Mint
Bugloss, Small Lycopsis arvensis Forget-Me-Not/Borage
Bugloss, Viper's/ Blueweed Echium vulgare Forget-Me-Not/Borage
Bulrush, Dark Green (see Bulrush, Small/ Dark Green Bulrush)
Bulrush, Great Scirpus validus Sedge
Bulrush, Small/ Dark Green Bulrush Scirpus atrovirens Sedge
Bur Marigold Bidens cernua Dandelion-Like
Bur-Reed Sparganium Bur-Reed
Burdock, Common Arcticum minus Thistle-Like
Burdock, Great Arctium lappa Thistle-Like
Butter-and-eggs/ Common Toadflax Linaria vulgaris Snapdragon (Figwort)
Buttercup, Bulbous Ranunculus bulbosus Buttercup
Buttercup, Common/ Tall Buttercup/ Meadow Buttercup Ranunculus acris Buttercup
Buttercup, Creeping Ranunculus repens Buttercup
Buttercup, early Ranunculus fascicularis Buttercup
Buttercup, Hispid Ranunculus hispidus Buttercup
Buttercup, Hooked Ranunculus recurvatus Buttercup
Buttercup, Kidneyleaf Ranunculus abortivus Buttercup
Buttercup, Meadow (see Buttercup, Common/ Tall Buttercup/ Meadow Buttercup)
Buttercup, Swamp Ranunculus septentrionalis Buttercup
Buttercup, Tall (see Buttercup, Common/ Tall Buttercup/ Meadow Buttercup)
Buttercup, tufted (see Buttercup, early)
Butterfly-weed/ Pleurisy Root Asclepias tuberosa Milkweed
Butternut Juglans cineria Walnut
Buttonwood (see Sycamore, American)
Berberis thunbergii
Caulophyllum thalictroides
Podophyllum peltatum
Galium triflorum
Gallium asprellum
Galium concinnum
Houstonia caerulea
Galium apartine
Houstonia tenuifolia
Galium circaezans
Sherardia arvensis
Mitchella repens
Galium odoratum
Fagus grandifolia
Castanea dentata
Castanea mollissima
Quercus velutina
Quercus prinus
Quercus palustris
Quercus rubra
Quercus ilicifolia
Quercus alba
Quercus phellos
Catalpa speciosa
Campsis radicans
Alnus rugosa
Betula lenta
Betula pendula
Betula populifolia
Betula nigra
Corylus americana
Ostrya virginiana
Carpinus caroliniana
Aristolochia durior
Asarum canadense
Staphylea trifola
Campanula americana
Specularia perfoliata
Pachysandra terminalis
Epifagus virginianum
Donofolis americana
Rhamnus cathartica
Rhamnus frangula
Fagopyrum sagittatum
Polygonum scandens
Rumex crispus
Rumex altissimus
Rumex patientia
Tovara virginianum
Polygonum erectum
Polygonum cuspidatum
Polygonum aviculare
Polygonum persicaria
Polygonum sachalinense
Polygonum cespitosum
Polygonum lapathifolium
Polygonum pensylvanicum
Rumex acetosella
Polygonum sagittatum
Polygonum arifolium
Polygonum hydropiper
Polygonum hydropiperoides
Sparganium
Eranthis hyemalis
Anemone quinquefolia
Ranunculus bulbosus
Ranunculus acris
Ranunculus repens
Ranunculus fascicularis
Ranunculus hispidus
Ranunculus recurvatus
Ranunculus abortivus
Ranunculus septentrionalis
Cimicifuga racemosa
Aquilega vulgaris
Aquilegia canadensis
Ranunculus scleratus
Hydrastis canadensis
Hepatica acutiloba
Delphinium tricorne
Delphinium ajacis
Thalictrum dioicum
Thalictrum polygamum
Anemonella thalictroides
Anemone virginiana
Clematis virginiana