PLATE XVIII. 
twice the height of those here drawn. I believe that the colour, the 
finely-pointed ends of the flowers, and the upright leaves are tolerably con- 
stant and effective distinctions. The mode of fertilization is simple, so 
that when the pollen-masses are once removed by insects, each mass has 
only to be bent forwards without any lateral sweep. In some Orchids, 
similar to this in many respects, but which have two separated stigmas, 
one on each side of the pouch, the pollen-masses swerve to the right and 
to the left, each aiming at the stigma nearest to its own side of the anther. 
This is seen in Orchis ustulata and others, Orchis olbiensis has only 
yet been found at Mentone on the higher mountains, to the summits 
of which it reaches. The Aiguille and Mulaciers mountains are its chief 
habitats, and the present known range is from about 2,500 to about 
4,000 feet. Perhaps this plant may be placed between Orchis pro- 
vincialis and O. laxiflora, having some likeness to O. acuminata and 
O. Haurii of Jordan, though not coinciding with either. Orchis olbiensis 
flowers from about the end of April to the middle of May. The speci- 
mens drawn in the plate were brought me from the Mulaciers mountain _ 
on May 4th. 
