• Species and lower taxa
• Higher taxa
• Common names

Acanthephippium, Genus

Acanthoglossum, Genus – synonym of Pholidota, Genus

Aceratochilus, Section (Calanthe)

Achroanthes, Genus – synonym of Malaxis, Genus

Acianthinae, Subtribe

Acoridium, Genus – synonym of Dendrochilum, Genus

Acriopsis, Genus

Acroanthes, Genus – synonym of Malaxis, Genus

Acrochaene, Genus – synonym of Bulbophyllum, Genus

Acuiferae, Section (Habenaria)

Adactylus, Genus – synonym of Apostasia, Genus

Adelopetalum, Genus – synonym of Bulbophyllum, Genus

Adenoncos, Genus

Adenorhachis, Section (Malaxideae)

Adenostylis, Genus – synonym of Zeuxine, Genus

Aeeridium, Genus – synonym of Aerides, Genus

Aerides, Section (Aerides)

Aerides, Genus

Aeridinae, Subtribe

Aeridostachya, Section (Eria)

Aeridostachya, Genus – synonym of Eria, Genus

Aetheria, Genus – synonym of Hetaeria, Genus

Aglossorhyncha, Genus

Agrostophyllinae, Subtribe

Agrostophyllum, Genus

Agrostophyllum, Section (Agrostophyllum)

Ala, Genus – synonym of Habenaria, Genus

Alatiliparis, Genus – synonym of Liparis, Genus

Alinorchis, Genus – synonym of Habenaria, Genus

Alipsa, Genus – synonym of Liparis, Genus

Alismorchis, Genus – synonym of Calanthe, Genus

Alismorkis, Genus – synonym of Calanthe, Genus

Allochilus, Genus – synonym of Goodyera, Genus

Altisceptrum, Section (Bulbophyllum)

Alvisia, Genus – synonym of Eria, Genus

Alwisia, Genus – synonym of Taeniophyllum, Genus

Amblyanthus, Section (Dendrobium)

Amblyglottis, Genus – synonym of Calanthe, Genus

Anaphora, Genus – synonym of Malaxis, Genus

Anecochilus, Genus – synonym of Anoectochilus, Genus

Ania, Genus – synonym of Tainia, Genus

Anisopetalon, Genus – synonym of Bulbophyllum, Genus

Anistylis, Genus – synonym of Liparis, Genus

Ankylocheilos, Genus – synonym of Taeniophyllum, Genus

Anoectochilus, Genus

Antennisepalum, Subgenus – synonym of Lepanthanthe, Section (Bulbophyllum)

Anzybas, Genus – synonym of Corybas, Genus

Aopla, Genus – synonym of Herminium, Genus

Apatales, Genus – synonym of Ceratostylis, Genus

Apaturia, Genus – synonym of Pachystoma, Genus

Apetalon, Genus – synonym of Didymoplexis, Genus

Aphananthos, Section (Malaxideae)

Aphanobulbon, Section – synonym of Stachysanthes, Section (Bulbophyllum)

Aphyllorchis, Genus

Apista, Genus – synonym of Podochilus, Genus

Aplostellis, Genus – synonym of Nervilia, Genus

Aporodes, Section (Bromheadia)

Aporum, Section (Dendrobium)

Apostasia, Section (Apostasia)

Apostasia, Genus

Apostasioideae, Subfamily

Appendicula, Section (Appendicula)

Appendicula, Genus

Appendiculopsis, Section (Agrostophyllum)

Appendiculopsis, Genus – synonym of Agrostophyllum, Genus

Arachnanthe, Genus – synonym of Arachnis, Genus

Arachnis, Genus

Arachnochilus, Section (Malaxideae)

Arethusantha, Genus – synonym of Cymbidium, Genus

Arethuseae, Tribe

Arethusinae, Subtribe

Argyrorchis, Genus – synonym of Macodes, Genus

Arisanorchis, Genus – synonym of Cheirostylis, Genus

Aristotelea, Genus – synonym of Spiranthes, Genus

Arthrochilus, Genus

Arundina, Genus

Ascidieria, Genus – synonym of Eria, Genus

Ascochilus, Genus – synonym of Geodorum, Genus

Ascoglossum, Genus

Ascotainia, Section (Tainia)

Ascotainia, Genus – synonym of Tainia, Genus

Ate, Genus – synonym of Habenaria, Genus

Aulostylis, Genus – synonym of Calanthe, Genus