The key for identification of varieties of Bulbophyllum taeniophyllum in the flora of Vietnam

1. Petals erose to irregular dentate; lower margin of stelidia entire ........................................7.1. B. taeniophyllum var. taeniophyllum

- Petals fimbriate; lower margin of stelidia denticulate .................................................. 7.2. B. taeniophyllum var. denticulatoalatum