| Scientific Name | Authority | Status |
|---|---|---|
| Microstylis quadrangularis | Cogn. | synonym |
| Microstylis carpinterae | Schltr. | synonym |
| Malaxis hastilabia | (Rchb.f.) Kuntze | synonym |
| Pycnantha orchioides | Ravenna | synonym |
| Microstylis caracasana | Klotzsch ex Ridl. | synonym |
| Microstylis paranaensis | Schltr. | synonym |
| Malaxis carpinterae | (Schltr.) Ames | synonym |
| Cheiropterocephalus sertulifer | Barb.Rodr. | synonym |
| Microstylis spiralipetala | Cogn. | synonym |
| Microstylis hastilabia | Rchb.f. | synonym |
| Malaxis ottonis | (Schltr.) Carnevali & I.RamÃrez | synonym |
| Malaxis sertulifera | (Barb.Rodr.) Pabst | synonym |
| Malaxis caracasana | (Klotzsch ex Ridl.) Kuntze | synonym |
| Microstylis sertulifera | (Barb.Rodr.) Schltr. | synonym |
| Malaxis uncinata | Ames & C.Schweinf. | synonym |
| Microstylis hastilabia var. major | Porsch | synonym |
| Malaxis hastilabia var. major | (Porsch) Marg. | synonym |
| Epidendrum umbellatum | Vell. | ambiguous synonym |
| Microstylis excavata | Lindl. | synonym |
| Microstylis muelleri | Schltr. | synonym |
| Microstylis ottonis | Schltr. | synonym |
| Malaxis hastilabia ssp. caracasana | (Klotzsch ex Ridl.) Marg. | synonym |
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