Distribution map of Bulbophyllum caloglossum
Bulbophyllum caloglossum Schltr., flower, front view, photo A. Schuiteman, Leiden cult. 20030903
Bulbophyllum caloglossum Schltr., flower, lateral view, photo E.F. de Vogel, Leiden cult. 20030903
Bulbophyllum caloglossum Schltr., flower, oblique lateral view, photo A. Schuiteman, Leiden cult. 20030903
Bulbophyllum caloglossum Schltr., flower detail, column and lip base, lateral view, photo A. Schuiteman, Leiden cult. 20030903
Bulbophyllum caloglossum Schltr., floral analysis, R. Schlechter in Repert. Spec. Nov. Regni Veg. Beih. 21 (1928) t. 249, fig. 949
Bulbophyllum caloglossum Schltr., herbarium sheet, Schlechter 19511 (isotype specimen K), photo copyright the Board of Trustees of the Royal Botanic Gardens, Kew