Bulbophyllum leysianum Burb., J. Roy. Hort. Soc. 17: cxxxiv (1895).This name is accepted.
J J Vermeulen states -- There has been much confusion over these two species but the most distinctive separation is B antenniferum has an ovate-triangular lip that is .088 to .089" [2.2 to 2.9mm] wide and is slightly constricted approx half way along its length and is adaxially minutely hirsute in the center and glabrous to minutely hirsute towards the apex. B leysianum has an oblong, hardly widening towards its base lip that is adaxially coarsly hirsute in the midle half of its length and then grading to finely hirsute towards the base and the apex. The lip is .048 to .078" [1.2 to 1.9mm wide].
Bulbophyllum leysianum, award 20163233, has been confirmed to be Bulbophyllum leysianum by SITF (Nov 2016).Â