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 Botrychium virginianum
Bouteloua gracilis Bouvardia ternifolia
Brachycome 'Splendor Mix' Brassavola 'Jimminey Cricket'
Brassavola nodosa Brassavola tuberculata
Brassica juncea 'Red Giant' X Brassoepidendrum 'Green Glades'
Brassolaelia 'Yellow Bird' X Brassolaeliocattleya 'Candlelight'
X Brassolaeliocattleya 'Elizabeth' X Brassolaeliocattleya 'Mendenhall'
X Brassolaeliocattleya 'Ojai Verte' Brighamia insignis
Briza media Brodiaea elegans
Brunnera macrophylla Brunnera macrophylla 'Hadspen Cream'
Brunnera macrophylla 'Jack Frost' Brunnera macrophylla 'Langtrees'
Brunnera macrophylla 'Langtrees ('Aluminum Spot')' Brunnera macrophylla 'Silver Wings'
Brunnera macrophylla 'Variegata' Buchloe dactyloides 'Sharps Improved'
Bulbine frutescens Bulbinella latifolia var. doleritica
Bulbocodium vernum Buphthalmum salicifolium
Burrageara 'Nelly Isler (Swiss Beauty)' Bursera microphylla
Butomus umbellatus Cabomba caroliniana
Caladium bicolor Caladium bicolor 'Candidum'
Caladium bicolor 'F.M. Joyner' Caladium bicolor 'Rosebud'
Caladium lindenii Calamagrostis x acutiflora 'Eldorado'
Calamagrostis x acutiflora 'Karl Foerster' Calamagrostis x acutiflora 'Lembterg'
Calamagrostis x acutiflora 'Overdam' Calamagrostis x acutiflora 'Stricta'
Calamagrostis arundinacea Calamagrostis foliosa
Calamintha grandiflora Calamintha grandiflora 'Variegata'
Calamintha nepeta Calamintha nepetoides 'White Cloud'
Calandrinia grandiflora Calandrinia umbellata
Calathea bella Calathea loeseneri
Calathea makoyana Calathea picturata
Calceolaria crenatiflora Calceolaria falklandica
Calendula suffruticosa ssp. maritima 'Sunlovers Skyfire' Calibrachoa 'Callie® (Peach)'
Calibrachoa 'Can-Can® (Terracotta)' Calibrachoa 'Colorful Expressions™'
Calibrachoa 'Colorful Expressions™ California Gold Rush' Calibrachoa 'Colorful Expressions™ Cherry Rose'
Calibrachoa 'Colorful Expressions™ Cranberry' Calibrachoa 'Colorful Expressions™ Deep Yellow'
Calibrachoa 'Colorful Expressions™ Rose' Calibrachoa 'Colorful Expressions™ Scarlet Red'
Calibrachoa 'Million Bells® Trailing Blue' Calibrachoa 'Million Bells®Cherry Pink'
Calibrachoa 'Spring Fling Rose Improved' Calibrachoa 'Spring Fling Yellow'
Calibrachoa 'Starlette Trailing Pink' Calibrachoa 'USCALI11 (Superbells® Pink)'
Calibrachoa 'USCALI17 (Superbells® Cherry Red)' Calibrachoa 'USCALI28 (Superbells® Red)'
Calibrachoa 'USCALI386-2 (Superbells® White)' Calibrachoa 'USCALI411-7 (Superbells® Dreamsicle)'
Calibrachoa 'USCALI53M (Tequila Sunrise)' Callirhoe involucrata
Calochortus clavatus Caltha palustris
Calylophus berlandieri Calylophus hartwegii