| B |
| Baboon flower, Babiana |
| Baby Blanket rose, Rosa 'KORfullwind' |
| Baby Faurax rose, Rosa 'Pol m Lillie' |
| Baby's breath, Gypsophila paniculata |
| Baby-blue-eyes, Nemophila menziesii |
| Bachelor's button, Centaurea cyanus |
| Bacopa, Sutera corda |
| Bagdad water lily, Nymphaea 'Bagdad' |
| Bald cypress, Taxodium distichum |
| Ball tree, Orange, Buddleia golbosa |
| Ballerina rose, Rosa 'Ballerina' |
| Balloon flower, Platycodon grandiflorus |
| Balsam, Impatiens balsamina |
| Baltimore Belle rose, Rosa 'Belle de Baltimore' |
| Banana shrub, Michelia figo |
| Banana shrub, Yunnan, Michelia yunnanensis |
| Baneberry; Doll's eyes; Necklace weed, Actaea pachypoda |
| Barbara Bush rose, Rosa 'JACbush' |
| Barbara's button, Grass-leaf; Marshallia, Marshallia graminifolia |
| Barber's diascia, Diascia barberae |
| Barberry, Chenault, Berberis x chenaultii |
| Barberry, Crimson pygmy Japanese, Berberis thunbergii 'Crimson Pygmy' |
| Barberry, Japanese, Berberis thunbergii |
| Barberry, Korean, Berberis koreana |
| Barberry, Mentor, Berberis x mentorensis |
| Barberry, Paleleaf, Berberis candidula |
| Barberry, Red, Berberis thunbergii var. atropurpurea |
| Barberry, Threespine, Berberis triacanthophora |
| Barberry, Warty, Berberis verruculosa |
| Barberry, William Penn, Berberis x gladwynensis 'William Penn' |
| Barberry, Wintergreen, Berberis julianae |
| Baroness Rothchild rose, Rosa 'Baronne Adolph de Rothchild' |
| Baronne Prevost rose, Rosa 'Baronne Prevost' |
| Barrenwort, Bicolor; Bicolor epimedium, Epimedium x versicolor 'Sulphureum' |
| Barrenwort, Red; Red epimedium, Epimedium x rubrum |
| Basil, Sweet, Ocimum basilicum |
| Basket-of-gold, Aurinia saxatilis |
| Basswood, Carolina, Tilia americana var. caroliniana |
| Bayberry, Northern, Myrica pensylvanica |
| Bayberry, Northern, Myrica pensylvanica |
| Bayberry, Swamp, Myrica heterophylla |
| Bazarre Triomphote rose, Rosa 'Bazarre Triomphote' |
| Beach rose, Rosa |
| Bead fern; Sensitive fern, Onoclea sensibilis |
| Bear's breeches, Acanthus spinosus |
| Bearberry, Arcrostaphy los uva-uisi |
| Beard-tongue; Penstemon, Penstemon canescens |
| Bearded tongue, Penstemon spp. |
| Beardtongue, Cobaea, Penstemon cobaea |
| Beardtongue, Foxglove; White beardtongue, Penstemon digitalis |
| Beardtongue; Penstemon, Penstemon canescens |
| Beauty Secret rose, Rosa 'Beauty Secret' |
| Beautyberry, American, Callicarpa americana |
| Beautyberry, American, Callicarpa americana |
| Beautyberry, Bodinier, Callicarpa bodinieri |
| Beautyberry, Japanese, Callicarpa japonica |
| Beautyberry, Purple, Callicarpa dichotoma |
| Beautybush, Kolkwitzia amabilis |
| Bedstraw; Cleavers, Galium aparine |
| Bee-balm, Crimson, Monarda didyma |
| Bee-balm; Oswego tea, Monarda spp. |
| Beech, American, Fagus grandifolia |
| Beech, English, Fagus engleriana |
| Beech, European, Fagus sylvatica |
| Beech, Fernleaved, Fagus sylvatica 'Asplenifolia' |
| Beech, Japanese, Fagus crenata |
| Beech, Weeping European, Fagus sylvatica f. pendula |
| Beech-drops, Epifagus virginiana |
| Begger's tick, Bidens laevis |
| Begonia, Angelwings, Begonia xargenteogutta |
| Begonia, Hardy, Begonia grandis |
| Begonia, Strawberry, Saxifraga stolonifera |
| Begonia, Wax, Begonia semperflorens |
| Begonias, Belgian, Begonia (Tuberous hybrids) |
| Begonias, Tuberous, Begonia (Tuberous hybrids) |
| Belinda rose, Rosa 'TANbeedee' |
| Belinda's Dream rose, Rosa 'Belinda's Dream' |
| Bella Donna rose, Rosa 'Bella Donna' |
| Belle Poitevine rose, Rosa 'Belle Poitevine' |
| Belle Story rose, Rosa 'AUSelle' |
| Bellflower, Campanula americana |
| Bellflower, Campanula spp. |
| Bellflower, Clustered, Campanula glomerata |
| Bellflower, Panicled; Southern harebell, Campanula divaricata |
| Bellflower; Tall bellflower; American bellflower, Campanula americana |
| Bells-of-Ireland, Molucella laevis |
| Bellwort, Large-flowered, Uvularia grandiflora |
| Bellwort, Sessile-leaf; Wild oats, Uvularia sessilifolia |
| Bellwort, Uvularia spp. |
| Bergamot, Purple, Monarda media |
| Bergenia, Bergenia cordifolia |
| Berlina rose, Rosa 'Berlin' |
| Bermuda's Kathleen rose, Rosa 'Bermuda's Kathleen' |
| Berries 'n Cream rose, Rosa 'POULclimb' |
| Betony, Wood; Lousewort, Pedicularis canadensis |
| Betty Boop rose, Rosa 'WEKplapic' |
| Betty Prior rose, Rosa 'Betty Prior' |
| Bewitched rose, Rosa 'Bewitched' |
| Bienenweide rose, Rosa 'Bienenweide' |
| Big bluestem; Turkey foot, Andropogon gerardii |
| Bigleaf snowbell, Styrax grandifolius |
| Bill Warriner rose, Rosa 'JACsur' |
| Bindweed, Field; Small bindweed, Convolvulus arvensis |
| Bingo Meidiland rose, Rosa 'MELpotal' |
| Birch, Asian white, Betula platyphylla |
| Birch, Asian white; Japanese white birch, Betula platyphylla var. japonica |
| Birch, Canoe, Betula papyrifera |
| Birch, European white, Betula pendula |
| Birch, Japanese cherry, Betula grossa |
| Birch, Monarch, Betula maximowicziona |
| Birch, Paper, Betula papyrifera |
| Birch, River, Betula nigra |
| Birch, Sweet, Betula lenta |
| Birch, Whitebarked Himalayan, Betula jacqemontii |
| Birch, Whitespire Japanese white, Betula platyphlla var. japonica 'Whitespire' |
| Bird's-eye; Birdeye speedwell, Veronica persica |
| Bishop's cap; Miterwort; Two-leaf miterwort, Mitella diphylla |
| Bishop's hat, Epimedium sempervirens |
| Bishops weed, Variegated, Aegopodium podograria 'Variegatum' |
| Bishops' weed, Aegopodium podograria |
| Bitter melon, Momordica balsamina |
| Bittersweet, American, Celastrus scandens |
| Bittersweet, American; Climbing bittersweet, Celastrus scandens |
| Bittersweet, Chinese, Celastrus orbiculatus |
| Bittersweet, Oriental, Celastrus orbiculatus |
| Black cohosh, Cimicifuga racemosa |
| Black gum, Nyssa sylvatica |
| Black haw, Viburnum prunifolium |
| Black Jade rose, Rosa 'BENblack' |
| Black lady fern, Athyrium japonicum |
| Black locust, Robinia pseudoacacia |
| Black-eyed Susan vine, Thunbergia alata |
| Black-eyed Susan, Rudbeckia fulgida |
| Black-eyed Susan, Rudbeckia hirta |
| Blackberry lily, Belamcanda chinensis |
| Bladder vine, Araujia sericifera |
| Bladdernut, American, Staphylea trifolia |
| Bladdernut, American, Staphylea trifolia |
| Bladdernut, Chinese, Staphylea holocarpa |
| Bladdernut, Colchis, Staphylea colchica |
| Bladdernut, Elegans, Staphylea x 'Elegans' |
| Bladdernut, European, Staphylea pinnate |
| Bladderwort, Utricularia |
| Bladderwort, Utricularia spp. |
| Blanc Double de Courbert rose, Rosa 'Blanc Double de Courbert' |
| Blanche Neige rose, Rosa 'Koster Blanc' |
| Blanket flower, Gaillardia x grandiflora |
| Blanket flower; Gaillardia, Gaillardia pulchella |
| Blast Off rose, Rosa 'MORflash' |
| Blaze rose, Rosa 'Blaze' |
| Blazing star, Liatris, Gayfeather, Liatris spp. |
| Blazing stars, Eastern, Liatris scariosa |
| Blazing stars, Large; Large button-snakeroot, Liatris scariosa |
| Blazing stars, Liatris |
| Blazing Stars, Liatris spicata |
| Blazing stars, Prairie, Liatris pycnostachya |
| Bleeding heart, Dicentra spectabilis |
| Bleeding heart, Fringed, Dicentra eximia |
| Bleeding heart, Wild; Plumy bleeding heart, Dicentra exima |
| Bleeding-heart, Dutchman's breeches, Dicentra spp. |
| Blood flower, Asclepias curassavica |
| Blood grass, Japanese, Imperarata cylindrica ruba |
| Blood on the Snow, Hydrangea serrata |
| Bloodroot, Sanguinaria canadensis |
| Bloomfield Courage rose, Rosa 'Bloomfield Courage' |
| Blossom Time rose, Rosa 'Blossom Time' |
| Blue Beauty water lily; Pennsylvania water lily, Nymphaea 'Blue Beauty' |
| Blue butterfly bush, Clerondendron ugandens |
| Blue curls, Trichostema dichotomum |
| Blue daze, Evolvulus glomeratus |
| Blue false indigo, Baptisia australis |
| Blue fescue, Festuca glauca (Festuca ovina var. glauca) |
| Blue haw; Witherod viburnum, Viburnum cassinoides |
| Blue lyme grass, Elymus arenarius (Leymus arenarius) |
| Blue oats grass, Helictotrichon sempervirens |
| Blue oats grass, Helictotrichor sempervirens (Avena sempervirens) |
| Blue poppy, Meconopsis betonicifolia |
| Blue star; Blue dogbane, Amsonia tabernaemontana |
| Blue trumpet vine, Thunbergia grandiflora |
| Blue wild indigo, Baptisia australis |
| Blue-eyed grass, Sisyrinchium angustifolium |
| Blue-green moor grass, Sesleria heufleriana |
| Bluebeard, Caryopteris spp. |
| Bluebeard; Blue mist shrub, Caryopteris x clandonensis |
| Blueberry Hill rose, Rosa 'WEKcryplag' |
| Blueberry, Creeping, Vaccinium crassifolium |
| Blueberry, Creeping, Vaccinium crassifolium |
| Blueberry, Highbush, Vaccinium corymbosum |
| Bluets, Common, Houstonia caerulea |
| Bluets, Houstonia, Houstonia spp. |
| Bluets, Woodland; Large houstonia, Houstonia purpurea |
| Blueweed; Viper's bugloss, Echium vulgare |
| Blunt lobed wood fern; Cliff fern, Woodsia obtusa |
| Bob Trickett water lily, Nymphaea 'Bob Trickett' |
| Bobbie James rose, Rosa 'Hmult' |
| Bog Cabbage of Holland rose, Rosa 'Gross Choux d'Holland' |
| Bonica rose, Rosa 'Meldomonac' |
| Bonset, Eupatorium perfoliatum |
| Bonset, Hyssop-leaved; Hyssop-leaved thoroughwort, Eupatorium hyssopifolium |
| Borage, Borago officinalis |
| Bottlebrush, Lemon, Callistemon citrinus |
| Bougainvillea goldenrain tree, Koelreuteria bipinnata |
| Bougainvillea, Bougainivillea spectabilis |
| Boulder fern; Hay-scented fern, Dennstaedtia punctiloba |
| Bouncing-bet; Soapwort, Saponaria officinalis |
| Bouncing-bet; Soapwort, Saponaria officinalis |
| Bowman's root; Indian physic, Gillenia trifoliata = Porteranthus trifoliatus |
| Bowman's root; Mountain Indian physic, Porteranthus trifoliatus (Gillenia trifoliate) |
| Boxelder, Acer negundo |
| Boxleaf hebe, Hebe buxifolia |
| Boxwood, Common, Buxus sempervirens |
| Boxwood, Elegans, Buxus sempervirens 'Elegantissima' |
| Boxwood, Elegans; Variegated boxwood, Buxus sempervirens 'Elegantissima' |
| Boxwood, English, Buxus sempervirens 'Suffruticosa' |
| Boxwood, Green Gem, Buxus 'Green Gem' |
| Boxwood, Green Mountain, Buxus 'Green Mountain' |
| Boxwood, Green Velvet, Buxus 'Green Velvet' |
| Boxwood, Harland, Buxus harlandii |
| Boxwood, Japanese, Buxus sinica var. japonica |
| Boxwood, Little leaf, Buxus sinica (B. microphylla) |
| Boxwood, Tree, Buxus sempervirens 'Arborescens' |
| Boxwood, Vardar Valley, Buxus sempervirens 'Vardar Valley' |
| Boxwood, Variegated, Buxus sempervirens 'Aureovariegata' |
| Boxwood, Variegated, Buxus sempervirens 'Elegantissima' |
| Bramble fern, Hypolepis repens |
| Bramble, Creeping; Taiwanese creeping rubus, Rubus calcyinoiden |
| Brandy rose, Rosa 'AROcad' |
| Brass Band rose, Rosa 'JACcofl' |
| Braum's holly fern, Polystichum braunii |
| Bridal Sunblaze rose, Rosa 'Mellmera' |
| Bride's Dream rose, Rosa 'KORoyness' |
| Brigadoon rose, Rosa 'JACpal' |
| Brilliant Pink Iceberg rose, Rosa 'PRObril' |
| Bristle fern; Tassel fern; Japanese tassel fern, Polystichum polylepharum |
| Bristly locust, Robinia hispida |
| Brittle bladder fern; Fragile fern, Cystopteris fragilis |
| Broad beech fern; Southern beech fern, Thelypteris hexagonopter; Phegopteris hexagonoptera |
| Broad wood fern, Dryopteris dilatata |
| Broad-leaf whitetop sedge; Star sedge, Rhychospora latifolia |
| Broad-leaved cotton grass, Eriophorum latifolia |
| Broadway rose, Rosa 'BURway' |
| Brodiaea, Brodiaea laxa (Triteleia) |
| Broom, Lydia, Genista lydia |
| Broom, Lydia, Genista lydia |
| Broom, Scotch, Cytisus scoparius |
| Broom, Spanish, Spartium junceum |
| Broomsedge; Beard grass; Broomstraw, Andropogon virginicus |
| Browallia, Browallia speciosa |
| Browallia, Browallia viscosa |
| Buckeye, Bottlebrush, Aesculus parviflora |
| Buckeye, Bottlebrush, Aesculus parviflora |
| Buckeye, California, Aesculus california |
| Buckeye, Ohio, Aesculus glabra |
| Buckeye, Painted, Aesculus sylvatica = Aesculus georgiana |
| Buckeye, Red, Aesculus pavi |
| Buckeye, Scarlet, Aesculus pavi |
| Buckeye, Yellow, Aesculus octandra (Aesculus flava) |
| Buckthorn bumelia, Bumelia lycioides |
| Buckthorn, Glossy, Rhamnus fragula |
| Buckwheat tree, Cliftonia monophylla |
| Buckwheat tree, Cliftonia monophylla |
| Buckwheat, Fagopyrum sagittatum |
| Buffalo Bill rose, Rosa 'MACyoumis' |
| Buffaloberry, Silver, Shepherdia argentea |
| Bugbane, American; Black snakeroot, Cimicifuga americana |
| Bugloss, Anchusa capensis |
| Bunchberry, Cornus canadensis |
| Bur marigold, Tickseed, Bidens aristosa |
| Burdock, Common, Arctium minus |
| Burdock, Great, Arctium lappa |
| Burgundian rose, Rosa centifolia 'Parvifolia' |
| Burnet, Canada, Sanguisorba canadensis |
| Burnet, Salad, Poterium sanguisorba |
| Burning Sky rose, Rosa 'Wezeip' |
| Bush beard grass, Andropogon glomeratus (Andropogon virginus var. abbreviatus) |
| Bush honeysuckle, Diervilla sessilifolia |
| Bush ivy, x Fatshedera lizei |
| Bush pea; False lupine; Thermopsis, Thermopsis villosa |
| Bush violet, Browallia speciosa |
| Bushclover, Shrub, Lespedeza bicolor |
| Butcher's broom, Ruscus aculeatus |
| Butter and eggs; Yellow toadflax, Linaria vulgaris |
| Buttercup, Carolina, Ranunculus carolinianus |
| Buttercup, Persian, Ranunculus hybrids |
| Buttercup, Ranunculus spp. |
| Butterfly bush, Alternateleaf, Buddleia alternifolia |
| Butterfly bush, Buddleia davidii |
| Butterfly bush, Cassia bicapsularis |
| Butterfly bush, Harlequin, Buddleia davidii 'Harlequin' |
| Butterfly bush, Lindley, Buddleia lindleyana |
| Butterfly bush, Lochinch, Buddleia 'Lochinch' |
| Butterfly bush, Orange, Buddleia golbosa |
| Butterfly bush, Weyer hybrid, Buddleia x weyeriana |
| Butterfly bush, Weyeriana, Buddleia x weyeriana |
| Butterfly bush, Winter cassia, Cassia bicapsularis |
| Butterfly flower, Schizanthus pinnatus |
| Butterfly pea, Clitoria mariana |
| Butterfly rose, Rosa chindensis mutabilis |
| Butterfly tulip, Calochortus |
| Butterfly weed, Asclepias tuberosa |
| Butterwort, Pinguicula spp. |
| Butterwort, Violet, Pinguicula caerulea |
| Buttonbush, Cephalanthus occidentalis |
| Buttonbush, Cephalanthus occidentalis |
| Buttonbush, Chinese, Adina rubella |
| Buttonweed, Diodia virginiana |