Key to the area around Malawi, Mozambique, Zambia, Zimbabwe and Botswana

1 Scape with several acute sheaths 2
  Scape without sheaths 4
2 Petals and lip 3-lobed, less than 8 mm long Holothrix tridactylites
  Petals and lip 5-11-lobed, over 10 mm long 3
3 Leaves, scape and bracts hairy Holothrix longiflora
  Leaves, scape and bracts glabrous Holothrix randii
4 Petals entire 5
  Petals 3-lobed 11
5 Lip entire or with 2-3 lobes or teeth 6
  Lip with 5-10 lobes or teeth 7
6 Lip entire, or minutely 3-lobed or notched, flowers lilac Holothrix brongniartiana
  Lip 3-lobed, the lobes 0.5-1.2 mm long; flowers buff or straw-yellow Holothrix villosa
7 Petals over 10 mm long Holothrix johnstonii
  Petals less than 6 mm long 8
8 Lip 9-13 mm long with l pair of lobes near base, the mid-lobe 3-toothed Holothrix orthoceras
  Lip 2.5-9.5 mm long; lobed in apical half 9
9 Lip lobed to about half-way; flowers buff Holothrix micrantha
  Lip with short apical teeth; flowers white 10
10 Ovary densely hairy Holothrix buchananii
  Ovary glabrous Holothrix macowaniana
11 Flowers densely papillose; lip 5-7 lobed Holothrix papillosa
  Flowers not papillose; lip 8-10 lobed Holothrix pleistodactyla

World Checklist of Monocotyledons. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; accessed 1/16/2010