Characters;"B. ganaensis";"B. burttiana"
Ligule;Absent;"0.55 cm, acuminate, reddish, glabrous"
Petiole;"4 cm, green, grooved";"1.0–1.8 cm, green, without winged"
Lamina;"Upper surface dark green";"Upper surface light green"
"Leaf size";"11.5 × 5.5 cm";"12–20 × 1.5–3 cm"
"Leaf base";Obtuse;Attenuate
"Leaf apex";Acute;"Slightly acuminate"
Bracts;"2.4 cm long, white, narrowly ovate, almost translucent";"4 cm long, cymbiform"
Labellum;"Yellow band from base in the middle, spreading to almost entire surface near apex with lighter yellow laterally, red bands from 2/3 of the centre yellow band towards side, 1.1 × 0.8 cm";"White, with yellow in the centre, pink at the base, 2.5 × 2 cm"
"Lateral corolla lobe";"Glabrous, white, 1.2 × 0.2 cm, emarginated, white with link pink ad yellowish at base, light pink patches towards lip";"Slightly pubescent, pale yellow, 1.5 × 0.8 cm"
Anther;"reddish, pubescent";"White, glabrous"
"Anther dehiscence";Pore;Slit
Stigma;Truncate;Rounded