Bakerara (Bak) = Brassia x Miltonia x Odontoglossum x Oncidium
Balaguerara (Blga) = Broughtonia x Epidendrum x Laeliopsis x Tetramicra
Baldwinara (Bdwna) = Aspasia x Cochlioda x Odontoglossum x Oncidium
Banfieldara (Bnfd) = Ada x Brassia x Odontoglossum
Bapticidium (Btcm) = Baptistonia x Oncidium
Baptiguezia (Bpt) = Baptistonia x Rodriguezia
Baptikoa (Btk) = Baptistonia x Zelenkoa
Baptirettia (Btta) = Baptistonia x Comparettia
Baptistoglossum (Bpgm) = Baptistonia x Odontoglossum
Baptistonia (Bapt)
Barangis (Brgs) = Aerangis x Barombia
Barbosaara (Bbra) = Cochlioda x Gomesa x Odontoglossum x Oncidium
Bardendrum (Bard) = Barkeria x Epidendrum
Barkeria (Bark)
Barkonitis (Bknts) = Barkeria x Sophronitis
Barlia (Ba)
Batemannia (Btmna)
Bateostylis (Btst) = Batemannia x Otostylis
Baumannara (Bmnra) = Comparettia x Odontoglossum x Oncidium
Beallara (Bllra) = Brassia x Cochlioda x Miltonia x Odontoglossum
Beardara (Bdra) = Ascocentrum x Doritis x Phalaenopsis
Benthamara (Ben) = Arachnis x Euanthe x Paraphalaenopsis
Benzingia (Bza)
Bhutanthera (Bhu)
Bifranisia (Bfsa) = Aganisia x Bifrenaria
Bifrenaria (Bif)
Bifrenidium (Bifdm) = Bifrenaria x Cymbidium
Bifreniella (Bifla) = Bifrenaria x Rudolfiella
Biltonara (Bilt) = Ada x Cochlioda x Miltonia x Odontoglossum
Binotia (Bin)
Bishopara (Bish) = Broughtonia x Cattleya x Sophronitis
Blackara (Blkr) = Aspasia x Cochlioda x Miltonia x Odontoglossum
Bletia (Bti)
Bletiaglottis (Blgts) = Bletia x Spathoglottis
Bletilla (Ble)
Bloomara (Blma) = Broughtonia x Laeliopsis x Tetramicra
Bogardara (Bgd) = Ascocentrum x Phalaenopsis x Vanda x Vandopsis
Bokchoonara (Bkch) = Arachnis x Ascocentrum x Phalaenopsis x Vanda
Bollea (Bol)
Bolleanthes (Blth) = Bollea x Cochleanthes
Bollopetalum (Blptm) = Bollea x Zygopetalum
Bonatea (Bnt)
Bonplandara (Bnp) = Cuitlauzina x Miltonia x Odontoglossum x Oncidium
Bovornara (Bov) = Arachnis x Ascocentrum x Rhynchostylis x Vanda
Brachtia (Bra)
Bradeara (Brade) = Comparettia x Gomesa x Rodriguezia
Bramiltumnia (Bmt) = Brassia x Miltonia x Tolumnia
Brapacidium (Bpc) = Aspasia x Brassia x Oncidium
Brapasia (Brap) = Aspasia x Brassia
Brasadastele (Bdt) = Ada x Brassia x Rhynchostele
Brascidostele (Bcd) = Brassia x Oncidium x Rhynchostele
Brassada (Brsa) = Ada x Brassia
Brassanthe (Bsn) = Brassavola x Guarianthe
Brassavola (B)
Brassia (Brs)
Brassidium (Brsdm) = Brassia x Oncidium
Brassioda (Broda) = Brassia x Cochlioda
Brassocatanthe (Bct) = Brassavola x Cattleya x Guarianthe
Brassocattleya (Bc) = Brassavola x Cattleya
Brassochilum (Bss) = Brassia x Cyrtochilum
Brassochilus (Brchs) = Brassia x Leochilus
Brassodiacrium (Bdia) = Brassavola x Diacrium
Brassoepidendrum (Bepi) = Brassavola x Epidendrum
Brassoepilaelia (Bpl) = Brassavola x Epidendrum x Laelia
Brassokeria (Brsk) = Barkeria x Brassavola
Brassolaelia (Bl) = Brassavola x Laelia
Brassolaeliocattleya (Blc) = Brassavola x Cattleya x Laelia
Brassomicra (Bmc) = Brassavola x Tetramicra
Brassophranthe (Bsp) = Brassavola x Guarianthe x Sophronitis
Brassophronitis (Bnts) = Brassavola x Sophronitis
Brassopsis (Brp) = Brassia x Miltoniopsis
Brassostele (Bst) = Brassia x Rhynchostele
Brassotonia (Bstna) = Brassavola x Broughtonia
Brianara (Brn) = Galeottia x Pabstia x Promenaea x Zygopetalum
Brilliandeara (Brlda) = Aspasia x Brassia x Cochlioda x Miltonia x Odontoglossum x Oncidium
Bromheadia (Brom)
Broughtonia (Bro)
Brownara (Bwna) = Broughtonia x Cattleya x Diacrium
Brummittara (Brum) = Comparettia x Odontoglossum x Rodriguezia
Bryobium (Byb)
Buiara (Bui) = Broughtonia x Cattleya x Epidendrum x Laelia x Sophronitis
Bulbophyllum (Bulb)
Burkhardtara (Bktra) = Leochilus x Odontoglossum x Oncidium x Rodriguezia
Burkillara (Burk) = Aerides x Arachnis x Vanda
Burrageara (Burr) = Cochlioda x Miltonia x Odontoglossum x Oncidium