| Habit | Epiphytic herbs | Lithophytic herbs | | Lithophytic herbs | |
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| Leaves | 0.9–2.6 cm long, elliptic, ovate- lanceolate | 4.1–9.1 cm long, elliptic, lanceolate-oblanceolate | 2.6–4.1 cm long, elliptic-ovate |
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| Peduncles | 7.5–9.7 cm long, 3–4-flowered inflorescence | 5–10 cm long, 4–5-flowered inflorescence | 4–6 cm long, 3–4-flowered inflorescence |
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| Flowers | 1.7–1.9 cm across, white with dark purple spots at the basal and lateral lobes | 1.5–2.4 cm across, white with dark purple spots at the base of lateral petals | 1.8–2.1 cm across, milky white |
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| Lateral sepals | Elliptic-oblong, white with dark purple tinges at apex | Elliptic-orbicular, white brown tinges at apex | with | Elliptic-oblong, white with green tinges at apex |
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| Dorsal petal | Broadly ovate-orbicular, white, keeled | Broadly ovate-orbicular, purple, keeled | pale | Elliptic-ovate, white, not keeled |
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| Wing petals–distal lobe | Broadly obovate, white with dark purple spots, spreading | Semi-flabellate, pale purple, not spreading | Shoe shaped, white with light purple dots, not spreading |
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| Dorsal auricle | Present, yellow | Absent | | Present, yellow | |
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| Lower sepal | Ovate, white with yellowish mark at middle and dark purple streaks horizontally, not spurred | Oblong, white with dark purple streaks, spurred | Elliptic-navicular, white yellow tinges, not spurred | with |
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| Seeds | Sub-globose, yellowish, white hairs all over the surface | Ellipsoid, both ends fringed with white hairs | Ovoid-ellipsoid, both ends fringed with white hairs |
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