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Transactions of the Royal Society of South Africa. 
27. Column of S. erectuni x coriifolhim, side view ; glands in position. 
28. Column of S. erectum, front view ; glands removed. 
29. Column of S. coriifolium, front view ; glands removed. 
30. Column of IS. erectum x coriifolium, front view ; glands removed. 
31. Pollinium of -S". erectum. 
32. Pollinivim of S. coriifolium. 
33. Pollinium of -S. erectum x coriifolium. 
34. Transverse section of ovary of S. erectum. 
35. Transverse section of ovary of S. coriifolium. 
36. Transverse section of ovary of -S'. erectum x coriifolium. 
37. Flower and bract of S. hicorne, front view, 
38. Flower and bract of S. erectum x hicorne, front view. 
39. Flower of /S". hicorne, side view from one aspect. 
40. Flower of »S. erectum x hicorne, side view from one aspect. 
41. Flower of 8. hicorne, side view from another aspect. 
42. Flower of S. erectum x hicorne, side view from another aspect. 
43. Lip of S. hicorne, side view. 
44. Lip of S. erectum x hicorne, side view. 
45. Lip of S. hicorne, front view. 
46. Lip of S. erectum x hicorne, front view. 
47. Sepals and side petals of 8. hicorne. 
48. Sepals and side petals of 8. erectum x hicorne, shoAving mottling. 
49. Ovary and column of 8. hicorne, side view. 
50. Ovary and column of 8. erectum x hicorne, side view. 
51. Column of 8. hicorne, side view. 
52. Column of 8. erectum x hicorne, side view. 
53. Column of 8. hicorne, front view ; glands in position, 
54. Column of 8. erectum x hicorne, front view ; glands in position. 
55. Column of 8. hicorne, front view; glands removed. 
56. Column of 8. erectum x hicorne, front view; glands removed. 
