| Dorsal sepal | Obovate, mucronate | Elliptic-ovate, acute | Oblong-elliptic, obtuse |
|---|
| Lateral sepals | Broadly ovate, acuminate | Ovate, acute | Oblong, apiculate |
|---|
| Petals | As long as column or slightly longer, triangular, ca. 2 mm long, 1 mm wide, margin entire, apical seta ca. 2 mm long | As long as or shorter than column, narrowly ovate, acuminate or shortly subulate, ca. 2 mm long | As long as half of column, triangular, ca. 1 mm long and wide, margin irregular dentate, apical seta 2–3 mm long |
|---|
| Lip adaxial side | With two prominent longitudinal keels and one short median keel, the base with two small, short, white calli | With one longitudinal channel, obscurely 2 keeled, without calli | With one longitudinal channel from base to near apex, without distinct keels or calli |
|---|
| Lip auricles | Falcate, acute or obtuse, entire or slightly erose | Falcate, ovate, apex blunt, margin entire | Rounded, denticulate |
|---|
| Stelidia | Falcate, triangular-elongate, without tooth | Somewhat falcate, triangular, with inconspicuous tooth on upper margin | Subulate, with small tooth on upper margin |
|---|
| Callus on lower stigma margin | Callus rectangular | Callus absent | Callus conoid |
|---|
| Flower color | Tepals light pinkish with violet veins, lip yellowish with violet marks | Tepals lilac with purple blotches, pinkish, little darker at the base | Tepals yellowish-green, marked with very dense dirty-purple spots, lip yellow, with blackish coating |
|---|