| Flower colour | Sepals and petals yellowish cream or yellow with orange or reddish spots, lip yellowish cream with reddish or orange spots on their sac and side lobes with pale reddish orange stripes | Sepals and petals yellowish cream or yellow with orange or reddish spots, lip white or cream with pale reddish or orange spots on their sac and side lobes with pale reddish orange stripes | Sepals and petals yellow with orange-brown blotches, lip white on their sac and side lobes with reddish-orange stripes |
| Dorsal sepal | Oblong-elliptic, 5.0–6.0 mm long × 4.0 mm wide, obtuse to rounded, both surfaces pubescent but abaxial with shorter hairs | Elliptic, 5.0–6.0 × 3.0–3.5 mm, obtuse to rounded, adaxial surface pubescent, abaxial with scattered shorter hairs | Ovate, 5.0–6.0 × 3.5–5.0 mm, obtuse to acute, only adaxial surface pubescent |
| Lateral sepals | Obliquely oblong-elliptic, 6.0 mm long × 4.0–5.0 mm, obtuse, both surfaces pubescent but abaxial with shorter hairs | Elliptic, 4.0–5.0 mm × 3.0–3.5 mm, obtuse to rounded, adaxial surface pubescent, abaxial with scattered shorter hairs | Broadly elliptic to broadly ovate, 5.0–6.0 × 3.5–5.0 mm, obtuse to acute, only adaxial surface pubescent |
| Petals | Oblong-obovate, 5.0–6.0 mm long × 3.0–4.0 mm wide, truncate to rounded, both surfaces pubescent but abaxial with shorter hairs | Broadly elliptic to ovate, 4.0–4.5 × 3.0–3.5 mm, obtuse to rounded, adaxial surface pubescent, abaxial with scattered shorter hairs | Ovate-orbicular, 4.0–5.0 × 3.0–4.5, obtuse, adaxial surface sparsely pubescent |
| Side lobes | Obliquely oblong, slightly falcate, c. 1.5 mm wide at base and narrowed gradually to about 1.0 mm near apex, truncate to obtuse | Triangular, relatively straight, c. 1.9 mm wide at base and narrowed gradually to about 0.8 mm near apex, acute | Obliquely oblong, slightly falcate, c. 2 mm wide at base and narrowed gradually to about 0.9 mm near apex, acute to obtuse |
| Front lobe | Broadly subtrapezoid, short, c. 1.0–1.5 × 1.5 mm, apex truncate to slightly emarginate, curved, base without any callus | Broadly subtrapezoid, short, c. 1.0–1.5 × 1.5 mm, apex truncate to slightly emarginate, curved, base without any callus | Broadly triangular, short, c. 2.0 × 1.0 mm, apex retuse, base with large callus on either side (c. 1.5 × 1.0 mm) |
| Lip’s sac | Ovate to subrectangular from front view, forming a “ V ” shape in longitudinal section view with a narrower angle (45–50 °), c. 2.0–2.5 × 2.0–2.3 mm, apex retuse to slightly bilobed | Subrectangular from front view, forming an “ L ” shape in longitudinal section view with a wider angle (90 °), c. 2.0–2.3 × 2.7–3.0 mm, apex retuse | Triangular from front view, forming a “ V ” shape in longitudinal section view with a narrower angle (45–50 °), c. 4.0–5.0 × 3.0–3.5 mm, apex obtuse |
| Internal lip’s sac ornament | An oblong fleshy thickening arises from basal to middle of the internal front wall, split into 2 lobed hairy callus that rises to sac opening, creating a small narrow cavity between apex of the hairy callus and the thick curved front lobe | A large and high oblong fleshy thickening arises from basal to middle of the internal front wall, split into 2 lobed long protruding hairy callus that rises to sac opening, creating a cavity between apex of the hairy callus and the thick curved front lobe | Internal callus absence |