| Arpophyllum spicatum Lex., 1825 |
| Arpophyllum squarrosum hort. ex Lubbers, 1880 |
| Arpophyllum stenostachyum Schltr., 1923 |
| Artorima Dressler & G.E. Pollard, 1971 |
| Artorima erubescens (Lindl.) Dressler & G.E. Pollard, 1971 |
| Arundina Blume, 1825 |
| Arundina graminifolia (D. Don) Hochr., 1910 |
| Aspidogyne Garay, 1977 |
| Aspidogyne maculata (Hook.) Meneguzzo, 2012 |
| Aspidogyne querceticola (Lindl.) Meneguzzo, 2012 |
| Aspidogyne stictophylla (Schltr.) Garay, 1977 |
| Aspidogyne vaginata (Hook.) Meneguzzo, 2012 |
| Aulosepalum Garay, 1982 |
| Aulosepalum hemichreum (Lindl.) Garay, 1982 |
| Aulosepalum nelsonii (Greenm.) Garay, 1982 |
| Aulosepalum oestlundii (Burns-Bal.) Catling, 1989 |
| Aulosepalum pulchrum (Schltr.) Catling, 1989 |
| Aulosepalum pyramidale (Lindl.) M.A. Dix & M.W. Dix, 2000 |
| Aulosepalum ramentaceum (Lindl.) Garay, 1982 |
| Aulosepalum riodelayense (Burns-Bal.) Salazar, 2011 |