SECTION Hyalosema Schlechter 1911

Typespecies: = Bulbophyllum grandiflorum Blume 1847

Characterized by having distinct pseudobulbs with new growths sprouting from the basal node and not fused to the pseudobulb, usually with a single flower with tubular floral bracts, a pedicel with the basal node well abover the attachment of the floral bract, free sepals or the lateral connate along the lower margin, as long as or s slightly shorterthan the median, obtuse to caudate, margins entire, glabrous to papillose to hirsute and usually 5 veined. The petals are obtuse to caudate, if caudate the tip is often thickened, into a globulbr to ellipsoid-cylindrical, appendage, margins entire, glabrous, usually 3 veined,. The lip is mobile on a thin ligament, undivided, oblong, ovate to sub-triangular, margins entire, glabrous to papillose to ciliate, adaxially often concave near the base without ridges, surface glabrous to partly hirsute. There are 4 pollina.

1. Bulbophyllum antenniferum [Lindley] Rchb. f. 1864 Java, Borneo, New Guinea and the Philippines

2. Bulbophyllum arfakianum Kraenzl. 1905 Papua New Guinea

3. Bulbophyllum bandischii Garay, Hamer, Siegerist 1992 New Guinea

4. Bulbophyllum biantennatum Schltr. 1913 Papua New Guinea

5. Bulbophyllum burfordiense Garay Hamer and Siegerist 1996 Papua New Guinea

6. Bulbophyllum cominsii Rolfe 1898 Papua and New Guinea and The Solomon Islands

7. Bulbophyllum dennisii J.J. Wood 1983 New Guinea and the Solomon Islands

8. Bulbophyllum fraudulentum Garay, F.Hamer & E.Siegerist 1996 Papua New Guinea

9. Bulbophyllum fritillariflorum J.J.Smith 1912 Sumatra, the Celebes, the Moluccas, and New Guinea

10. !Bulbophyllum grandiflorum Blume 1847

    SECTION Hyalosema

11. Bulbophyllum leysianum Burb. 1894 Borneo

12. Bulbophyllum longisepalum Rolfe 1895 southeastern New Guinea

13. Bulbophyllum micholitzii Rolfe 1901 Penninsular Malaysia and Thailand

14. Bulbophyllum minahassae Schltr. 1911 Sulawesi

15. Bulbophyllum ornithorhynchum (J.J.Sm.) Garay, Hamer & Siegerist 1992 Java

16. Bulbophyllum platysepalum Garay ined.

17. Bulbophyllum saronae Garay 1999 Papua New Guinea

18. Bulbophyllum schmidii Garay 1999 Irian Jaya

19. Bulbophyllum singulare Schltr. 1913 Papua New Guinea

20. Bulbophyllum trachyanthum Kraenzl. 1894 Papua New Guinea, Solomon Islands, Fiji and Samoa

21. Bulbophyllum tricanaliferum J.J. Sm. 1913 Papua New Guinea

22. Bulbophyllum unitubum J.J. Sm. 1929 Indonesia, Papua New Guinea, and Borneo