• Species and lower taxa
• Higher taxa
• Common names

Bambusifolia, Section (Eria)

Barbata, Section (Paphiopedilum)

Basigyne, Genus – synonym of Dendrochilum, Genus

Beccariana, Section (Bulbophyllum)

Biflorae, Section – synonym of Brachyantha, Section (Bulbophyllum)

Bilabrella, Genus – synonym of Habenaria, Genus

Biloba, Section (Dendrobium)

Birchea, Genus – synonym of Luisia, Genus

Bisepalum, Subgenus – synonym of Macrouris, Section (Bulbophyllum)

Blephariglottis, Genus – synonym of Platanthera, Genus

Blepharochilum, Genus – synonym of Bulbophyllum, Genus

Blepharochilum, Genus – synonym of Monanthes, Section (Bulbophyllum)

Blumeorchis, Genus – synonym of Cleisostoma, Genus

Bogoria, Genus

Bolbophyllaria, Genus – synonym of Bulbophyllum, Genus

Bolbophyllopsis, Genus – synonym of Brachyantha, Section (Bulbophyllum)

Bolbophyllopsis, Genus – synonym of Bulbophyllum, Genus

Bolborchis, Genus – synonym of Nervilia, Genus

Bothrocardia, Section (Malaxideae)

Brachyantha, Section (Bulbophyllum)

Brachyanthera, Section (Taeniophyllum)

Brachyostele, Section – synonym of Beccariana, Section (Bulbophyllum)

Brachypeza, Genus

Brachypus, Section (Bulbophyllum)

Brachystachyae, Section (Bulbophyllum)

Brevisaccata, Section (Dendrobium)

Bromheadia, Section (Bromheadia)

Bromheadia, Genus

Bromheadiinae, Subtribe

Brownleeinae, Subtribe

Bryobium, Genus – synonym of Eria, Genus

Bulbophaius, Section (Phaius)

Bulbophreatia, Section (Phreatia)

Bulbophyllinae, Subtribe

Bulbophyllum, Genus

Bulbophyllum, Genus – synonym of Bulbophyllum, Genus

Bunochilus, Genus – synonym of Pterostylis, Genus