Terrestrial herb, geophyte, up to 0.30 m high; with small, globose, root tubers. Leaf solitary, basal and appressed to ground, reniform-orbicular, up to 35 mm in diam. Inflorescence normally 1-flowered. Sepals subequal, free, erect, pale green; dorsal sepal 10-13 mm long. Petals white and purple, 8-16 mm long. Lip spurred, up to 32 mm long, conspicuously fimbriate, many linear lobes, apices with white, terminal knob, same colour as petals; spur 6-9 mm long. Flowering time Oct.-Dec.
Slender, tuberous geophyte, up to 300 mm tall, scape hairy. Leaf single, basal, ovate, prostrate, hairy. Flower usually solitary, white and lilac-blue, lip much divided with its segments clavate at tips, lip spur 8-14 mm long. (Jul.-)Oct.-Dec.
Like B. burmaniana but lip segments club-shaped tips.