`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 above the attachment of the floral bract, free sepals or the lateral connate along the lower margin, as long as or slightly shorter than 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 globular 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.

There are more or less than 19 species within montane forests up to 1500 meters in elevation in Thailand and Java and then eastward to the Pacific Islands

Entries below with an asterix are listed in publications by J J Vermeullen and so are more likely correct than ones without. Species with a question mark in front, seem to me to not conform and so please use with caution. If a sectional name has a "`" in front then it is a complete section with all the known species represented.

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 cominsii Rolfe 1898 Papua and New Guinea and The Solomon Islands

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

7. Bulbophyllum elephantinum 1913 New Guinea

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 Sumatra, Sulawesi, the Moluccas, and New Guinea

11. Bulbophyllum kermesinum Ridl. 1886 New Guinea

12. *Bulbophyllum leysianum Burb. 1894 Borneo

13. Bulbophyllum longisepalum Rolfe 1895 southeastern New Guinea

14. Bulbophyllum minahassae Schltr. 1911 Sulawesi

15. Bulbophyllum saronae Garay 1999 Papua New Guinea

16. Bulbophyllum schmidii Garay 1999 Irian Jaya

17. Bulbophyllum singulare Schltr. 1913 Papua New Guinea

    Bulbophyllum sp.2 New Guinea

    Bulbophyllum sp New Guinea

18. Bulbophyllum tentaculatum Schltr. 1913 New Guinea

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

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

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