| Genus - Species - - Year | Subgenus Section Subsection Series | Distribution | #descendants | #photos |
|---|---|---|---|---|
| Bulbophyllum quadrifalciculatum 1929 | Sec. Monanthes | New Guinea | ||
| Bulbophyllum quadrisubulatum 1929 | Sec. Monanthes | New Guinea | ||
| Bulbophyllum quinquelobum 1913 | Sec. Monanthes | New Guinea |