114 AMONG THE WILD FLOWERS. 
the name Gyxzandria in the Linnean system, 
in which it forms Cl. XX., the stamens being 
actually placed upon the stigma, which is a 
viscid or glutinous space above the germen. 
If you examine a spike of flowers—for 
example that of the common species Orchzs 
maculata—you will observe that in each flower 
the corolla and the calyx, which are both of the 
same colour, are attached to the top of the 
germen, which has thus the appearance of 
being a flower-stalk, and is often, as in the 
genus Orchis, spirally twisted. There are 
three sepals which are fatent, spreading out 
widely, and often coloured; two of them are 
the outer lateral leaves, and the remaining 
one is at the back of the flower. Within 
these are the two upper petals of the 
corolla, which converge, forming a sort of 
concave hood over the centre of the flower ; 
the third petal projects in front as a lip, 
labellum, which is often divided into three 
lobes, and more or less streaked with purple ; 
this petal is sometimes extended behind in 
a hollow tubular form which is called a spur. 
In our two species of the white Butterfly 
Orchis, Habenaria bifolra and chlorantha, this 
