| Name | Phymatidium mellobarretoi L. O. Williams |
| Authorship | L. O. Williams |
| Rank | Species |
| Placed in | Phymatidium Lindley |
| Citation | 1947 Arq. Bot. Estado Sao Paulo 2: 92 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Phymatidium mellobarretoi L. O. Williams |
| Identification made in | 2011 (1) |