OCTOBER, 1907.] THE ORCHID REVIEW. 305 
CATTLEYA PERCIVALIANA TRILABIATE. 
In January, 1903, a remarkable three-lipped flower of Cattleya Percivaliana 
appeared in the collection of A. H. Hills, Esq., of San Francisco, and was 
sent to us, alsoa photograph. Its history was given at the time (O.R, xi. 
Pp. 43, 319), and the photograph is now reproduced. As will be seen by 
the figure, the sepals and petals are normal, but the lip is broken up into three, 
all equally perfect, but smaller than usual. The centre one occupies the 
position of the normal lip, while the two others are lateral, occupying the 
position of the lateral stamens of the outer staminal whorl of a typical 
monocotyledon. It is the union of these two lateral stamens with the 
Fig. 34. CATTLEYA PERCIVALIANA TRILABIATE. 
median petal that produces thelip of an Orchid, and the present instance 
is a good example of a lip breaking up into its original elements. It is true 
that the lateral pair of lips has not reverted to normal anthers, but an 
example of this in Cattleya labiata has been recorded (O.R. ii. p. 358). In 
that case this pair of organs had broken away from the median petal, and 
wandered up the column, there developing as normal anthers. Thus there 
were three perfect anthers with twelve pollinia, at the apex of a perfectly 
Straight column, while the lip was replaced by an ordinary petal, both as to 
shape and colour. Curiously enough, in the second flower on the inflores- 
cence the column had broken up, and was much smaller than usual, with- 
