Berchemia polyphylla leioclada Bergenia 'Apple Blossom'
Bergenia 'Rosi Klose' Bergenia 'Silberlicht (Silver Light)'
Bergenia cordifolia Bergenia cordifolia 'Bressingham Ruby'
Bergenia cordifolia 'Bressingham White' Bergenia cordifolia 'Perfect'
Bergenia cordifolia 'Rotblum' Bergenia cordifolia 'Winterglut (Winter Glow)'
Bergenia crassifolia var. pacifica Bergenia purpurascens
Bergenia stracheyi Bergeranthus jamesii
Bergerocactus emoryi Berzelia lanuginosa
Beschorneria septemtrichonalis Beschorneria yuccoides
Beta vulgaris ssp. cicla 'Fordhook Giant' Beta vulgaris var. flavescens 'Bright Lights'
Betula x 'Lace Towers' Betula albosinensis
Betula albosinensis var. septentrionalis Betula alleghaniensis
Betula andrewsii Betula costata
Betula ermanii Betula fontinalis
Betula grandiflora Betula lenta
Betula litwinowii Betula maximowicziana
Betula nigra Betula nigra 'BNMTF (Dura-Heat™)'
Betula nigra 'Cully (Heritage®)' Betula nigra 'Little King (Fox Valley®)'
Betula nigra 'Summer Cascade' Betula nigra minor
Betula papyrifera Betula papyrifera var. commutata
Betula pendula Betula pendula 'Crimson Frost'
Betula pendula 'Dalecarlica' Betula pendula 'Laciniata'
Betula pendula 'Tristis' Betula pendula 'Youngii'
Betula platyphylla Betula platyphylla var. japonica
Betula populifolia Betula populifolia 'Whitespire'
Betula x purpusii Betula tiansca
Betula turkestania Betula uber
Betula utilis Betula utilis var. jacquemontii
Betula utilis var. jacquemontii 'Kashmir White' Bidens ferulifolia 'Gold Marie'
Bidens ferulifolia 'Golden Eye' Bidens ferulifolia 'Golden Goddess'
Bidens ferulifolia 'Marietta Gold Spark' Bidens ferulifolia 'Summerlovers Biden 1850'
Bignonia capreolata Bignonia capreolata 'Jekyll'
Bignonia capreolata 'Tangerine Beauty' Billbergia x 'Kyoto'
Bischofia javanica Bismarckia nobilis
Bixa orellana Blechnum cordatum
Blechnum gibbum Blechnum nudum
Blechnum occidentale Blechnum spicant
Bletilla striata Bocconia latisepala
Boehmeria nivea Boehmeria nivea 'Ramie'
Bolax gummifera Boltonia asteroides 'Pink Beauty'
Boltonia asteroides 'Snowbank' Boltonia asteroides 'Snowflake'
Boltonia asteroides var. latisquama 'Nana' Bomarea hirsuta
Bombax ceiba Borago officinalis
Borassus aethiopium Borassus flabellifer
Boronia mollis Boronia pilosa 'Rose Blossom'
Boronia safrolifera 'Pink Diamonds' Boronia serrulata
Borrichia arborescens Bossiaea linophylla
Botrychium virginianum