92 ALTERATION OF POSITION. 
by the woodcut. Let the usual arrangement be thus 
represented : 
s standing for sepal, p for petal, 1 for lp, sr for 
stamen; then the dislocated form may be represented 
thus : 
1E IF 

Frag. 43.—Flower of Oncidium cucullatum, showing union of two lower 
sepals, displacement of column and lip, &e. 
In a specimen of Cypripedium also furnished by Mr. 
Anderson the appearance was as represented in the 
accompanying figure and diagrams, figs. 44, 40. 
Referring to the plan of the natural arrangement at 
fig. 46, it will be seen that an explanation of the pecu- 
liar appearance of the flower may be arrived at by 
supposing a disunion and lateral displacement of the 
upper segment of the outer perianth together with the 
