Jiang, H., Cheng, Y.-H., Belay, J.Z. & Hu, G.-W. (2025) Reinstatement of Bulbophyllum quadrangulum (Orchidaceae) from B. chondriophorum with morphological and molecular evidence. Phytotaxa 691 (1): 49–62. https://doi.org/10.11646/phytotaxa.691.1.4