10 THE ORCHID REVIEW. [JANuARY, 1916 
normal form. The number of varieties now known is very great, but the 
variation is chiefly limited to the size and number of the brown spots, the 
relative proportions of green and white, and the general size of the flower, 
the culminating point in this respect being reached in the Harefield Hall 
var., also known as var. giganteum (see O.R., xix. p. g. fig. 1). The variety 
Maulei, which was introduced by Messrs. Henderson & Son, in 1855, was 
probably the earliest of them, but punctato-violaceum was described soon 
afterwards. Their most distinguishing character is that the uppermost 
Fig. 8. C. INSIGNE SANDERIANUM. 
blotches are clear purple in colour, resulting from their extension into the 
white area, or the shrinkage of the green ground colour, for the spots that 
appear on the green area are invariably brown, representing the oe 
tion of green and purple. 
The advent of a yellow variety some twenty-seven years ago gave an 
immense impetus to the popularity of this useful species. This was var. 
Sanderz, which appeared quite unexpectedly in Messrs. Sander’s establish- 
ment at St. Albans in 1888, among a lot of imported plants. The absence. 
