Vanda helvola

Smith, J.J., Orchid. Java (1905) 594
Smith, J.J., Orchid. Java, Fig.-Atl. (1912) fig. 443
Howcroft, N.H.S., Orchadian 11 (1993) 26, fig. 2-7, pl. 27-30
Chan, C.L., A. Lamb, P.S. Shim & J.J. Wood, Orchid. Borneo 1 (1994) 307, fig. 98, pl. 21F & 22A