SECTION Macrocaulia (Bl.) Aver 1994

LECTOTYPE SPECIES: Diphyes ovalifolia Bl. = Bulbophyllum ovalifolium (Bl.) Lindl.

SYNONYMS - Diphyes sect. Macrocaulia Bl. 1825; SECTION Monilibulbus J.J.Sm. 1914 - SECTION Diasperia Bl. 1825 - SECTION. Odoardiana Pfitz. 1889

Vermuellen 2014 states that the plants are epiphytes with a creeping rhizome giving rise to shoots proximally fused to the pseudobulbs carrying a single, apical, usually persistent leaf that blooms on a single flowered inflorescence carrying resupinate flowers that have the pedicel basal node above the attachment of the floral bracts. Usually the dorsal sepal is free, has 3 to 5 veins and has entire to glabrous to erose to papillose margins, the laterals are 1 to 5 times as long as the dorsal sepal. The petals have 1 to 3 veins and the margins are entire to erose. The usually undivided, mobile lip is on a thin ligament, the column stigma is proximally protruding or not, the stelida are with or without a slight tooth along the upper and lower margins. The anterior surface of the anther is concave or not and the anterior margin is drawn out or not. There are 2 to 4 pollina with or without stipes.

Vermuellen etal 2015 state that the creeping, brittle rhizomes break off just in front of the part fused to or covered by the prostrate pseudobulb. The peduncle scales are all close to the base of the peduncle but in some species [B dransfieldii and B streptomorphum] the peduncle is so short that the character is not obvious. Usually the abaxial side of the lip does not have a groove over the median line, exeptions are B anisopterum, B streptomorphum, B longistellidum and B tristriatum.

There are more or less 68 species in this section from forests up to elevations of 2500 meters in India, China, Myanmar, Laos, Vietnam, Thailand, penninsular Malaysia, Sumatra, Java, Bali, Borneo, Sulawesi and the Philippines.

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.

1. Bulbophyllum adjungens Seidenf. 1979 Thailand

2. *Bulbophyllum alatum J.J.Verm. 1991 Sabah Borneo

3. Bulbophyllum alboaligerum Cootes, Cabactulan, M.Leon & R.B.Pimentel 2018 Philippines

4. *Bulbophyllum anguliferum Ames & C. Schweinf. 1920 Borneo

5. * Bulbophyllum anisopterum J.J.Verm. & P.O'Byrne 2003 - Borneo

6. *Bulbophyllum aschemon J.J.Verm. & A.L.Lamb 2008 Malaysia and Sarawak Borneo

7. *Bulbophyllum auriculatum J.J.Verm. & P.O'Byrne 2003 Sulawesi

8. *Bulbophyllum bilobipetalum J.J.Sm. 1927 Kalimantan Borneo

9. *Bulbophyllum biseriale Carr 1930 Thailand and Malaysia

10. Bulbophyllum calyptogyne J.J.Verm. & P.O'Byrne 2011 Sulawesi

11. Bulbophyllum carrianum J.J.Verm. 2000 Borneo

12. *Bulbophyllum catenarium Ridl. 1894 Malaysia, Borneo and Vietnam

13. *Bulbophyllum cernuum [Bl.]Lindl. 1830 Thailand, Borneo and Java

14. *Bulbophyllum chanii J.J.Verm. & A.L.Lamb 1991 Sabah Borneo

15. Bulbophyllum chlorascens J.J.Sm. 1927 Sumatra

16. *Bulbophyllum coelochilum J.J.Verm.1991 Sabah Borneo

17. Bulbophyllum connatum Carr 1933 Sumatra

18. *Bulbophyllum corticola Schlechter 1010 - Borneo

19. *Bulbophyllum dibothron J.J.Verm. & A.L.Lamb 1994 Sabah and Sarawak

20. Bulbophyllum didymotropis Seidenf. 1979 Yunnan province of China and Thailand

21. *Bulbophyllum dransfieldii J.J.Verm. 1991 - Borneo

22. Bulbophyllum exquisitum Ames 1923 Philippines

23. Bulbophyllum fulgens J.J.Verm. 1996 Sumatra

24. Bulbophyllum gofferjeei J J Verm & Lamb 2013 Sabah Borneo

25. Bulbophyllum hirsutum Lindl. 1830 Java

26. Bulbophyllum hodgsonii M.R.Hend. 1927 Malaysia in the Cameron Highlands

27. Bulbophyllum ignevenosum Carr 1930 penninsular Malaysia and Vietnam

28. Bulbophyllum inaequale (Blume) Lindl. 1830 Java

29. Bulbophyllum jayii J J Verm & Lamb 2013 Sumatra, Borneo

30. *Bulbophyllum kestron J.J.Verm. & A.L.Lamb 1988 Sabah Borneo

31. Bulbophyllum koilobasis J.J.Verm., P.O'Byrne & A.L.Lamb 2015 Borneo

32. Bulbophyllum konstantinovii Aver. 2013 Cambodia

33. Bulbophyllum lacinulosum J J Sm. 1927 Borneo

34. *Bulbophyllum lambii J.J.Verm. 1991 Borneo

35. *Bulbophyllum latisepalum Ames & C.Schweinf. 1920 Mt Kinabalu Borneo

36. *Bulbophyllum leniae J.J.Verm. 1991 Borneo and Sulawesi

37. *Bulbophyllum leproglossum J.J.Verm. & A.L.Lamb 1988 Borneo

38. *Bulbophyllum longhutense J.J.Sm. 1931 Sabah and Kalimantan Borneo

39. *Bulbophyllum longistelidium Ridl. 1924 penninsular Malaysia and Sabah Borneo

40. Bulbophyllum lyciachungianum P.O'Byrne & Gokusing 2016 Borneo

41. *Bulbophyllum malleolabrum Carr 1932 Malaysia, Borneo and Sulawesi

42. Bulbophyllum menghaiense Z.H.Tsi 1981 Yunnan China

43. Bulbophyllum mengyuanense Q.Liu, Jian W.Li & X.H.Jin 2015 Yunnan China

44. Bulbophyllum mindorense Ames 1907 the Philippines

45. *Bulbophyllum minutulum Ridl. ex Burkill & Holttum 1923 penninsular Malaysia and Borneo

46. *Bulbophyllum montense Ridl. 1894 Borneo

47. *Bulbophyllum muluense J.J.Wood 1984 Borneo

48. *Bulbophyllum nubinatum J.J.Verm. 1988 - Borneo

49. Bulbophyllum odoardi Rchb.f. & Pfitzer 1884 Borneo

50. *!Bulbophyllum ovalifolium [Bl] Lindl. 1830 Chinese Himalayas, Thailand, Malaysia, Sumatra, Java, Borneo, lesser Sunda Islands and Sulawesi

51. Bulbophyllum pan Ridl. 1915 penninsular Malaysia

52. *Bulbophyllum pelicanopsis J.J.Verm. & A.L.Lamb 1988 Sabah Borneo

53. Bulbophyllum pentaneurum Seidenf. 1979 Thailand

54. Bulbophyllum perryi J.J.Verm. & Kindler 2015 Sumatra?

55. Bulbophyllum phaeoneuron Schltr. 1911 Borneo

56. Bulbophyllum physocoryphum Seidenf. 1979 Thailand, Laos

57. *Bulbophyllum proculcastris J.J.Verm. 2000 Borneo

58. Bulbophyllum puntjakense J.J.Sm. 1907 Java, Borneo and the Lesser Sunda Islands

59. *Bulbophyllum pyridion J.J.Verm. 1991 - Borneo

60. Bulbophyllum remiferum Carr 1933 Sumatra

61. *Bulbophyllum scabrum J.J.Verm. & A.L.Lamb 1988 Borneo

62. *Bulbophyllum schefferi (Kuntze) Schltr. 1915 Java, Sumatra, Sabah, Kalimantan and Sarawak Borneo as well as the Philippines

63. *Bulbophyllum similissimum J.J.Verm.1991 Borneo

64. Bulbophyllum simplicilabellum Seidenf. 1979 Thailand

65. Bulbophyllum stormii J.J. Sm. 1907 Malaysia, Sumatra and Borneo

66. * Bulbophyllum streptomorphum J J Verm., O'Byrne and Lamb 2015 - Borneo

67. Bulbophyllum subtenellum Seidenf. 1979 Thailand

68. Bulbophyllum tekuense Carr 1930 penninsular Malaysia

69. Bulbophyllum tenellum Lindl. 1830 Java

70. Bulbophyllum thymophorum J.J.Verm.& A.L.Lamb 1988 Sabah Borneo

71. Bulbophyllum titanea Ridl. 1908 penninsular Malaysia

72. *Bulbophyllum torajarum J.J.Verm. & P.O'Byrne 2008 Sulawesi

73. Bulbophyllum tristriatum Carr 1930 Thailand, penninsular Malaysia and Sabah Borneo

74. Bulbophyllum tubilabrum J.J.Verm. & P.O'Byrne 2003 Sulawesi *

75. Bulbophyllum vestigipetalum J J Verm & Lamb 2013 Borneo

    References W3 Tropicos, Kew Monocot list , IPNI ; * Gard. Bull. Singapore 60:108 J.J.Verm. & P.O'Byrne 2008; Flora of China 25: 404–440. 2009; Genera Orchidacearum Vol 6 Epidendroideae Pt 3 Pridgeon, Cribb Chase & Ramussen 2014;