1 | Flowers large, 20-40 mm diam.; sepals and petals with reddish-brown or dark purple banding; sepals 10-22 mm long; lip (9-)19-23 mm long; column 4-10 mm long; leaves 10-15(-28) cm long |
1' | Flowers small, 10-20 mm diam.; sepals and petals not banded as above; sepals 6-13 mm long; lip 6-11 mm long; column 2-3.5 mm long; leaves (1.5-)3-12(-17) cm long |
2 | Leaves well-developed, placed in close succession along the stem, longer than the internodes, the largest leaves 3.5-7(-10) cm wide; lip 9-11 mm long |
2' | Leaves reduced, placed remotely along the stem, often shorter than or equalling the internodes, the largest leaves 0.7-3.5(-4.5) cm wide; lip 6-9 mm long |
3 | Inflorescence many-flowered, dense; leaves brownish- to yellowish-green, sometimes suffused reddish-purple on the undersurface; epichile of lip with a single v-shaped basal callus |
3' | Inflorescence few- to several-flowered, lax; leaves dark green, stained or suffused purple-violet or purple-red; epichile of lip with 2 small, rugose or rugulose basal calli |
4 | Sepals glabrous, 10-12 x 5 mm, yellowish- to dull olive-green; ovary short-pedicelled, clavate, puberulous |
4' | Sepals pubescent, 6-8 x 3 mm, green, tinged purple-red outside, whitish-green inside; ovary long-pedicelled, fusiform, tomentose |