66 
W. C. Worsdell. 
as in the case of the posterior petal of Veronica (the posterior sepal 
being here frequently present), is no larger in size than either of the 
original unfused organs, whilst the peloric flower is very much 
larger. 
Celakovsky has admirably described the variations occurring in 
Lonicera Periclynienum as to the number of members present in 
each leaf-whorl of the stem. He regards the 2 membered whorl as 
primitive, the 3-& 4-membered as derivative therefrom. But 
numerous intermediate or transitional whorls occur in which, instead 
of two or four distinct and separate normal leaves respectively 
being found, one or more members of the whorl are more or less 
deeply or regularly forked or notched. (Fig. 20.) Similar divided 
Fig. 20. Double foliage leaves of Lonicera Periclynienum; A slightly notched 
apex ; B deeply forked ; C development of two leaves instead of 
one, but both still attached to same base. 
leaves occur in a great number of plants, as in Euonymus, japonicus 
Scolopendrium vulgare, &c., &c. I myself noticed in Oxalis 
asinina that some of the leaves were undivided, others had a very 
minute notch at the apex, others, again, were deeply forked ; these 
last had thicker petioles than the undivided ones. The same 
phenomenon may be frequently seen in the cotyledons of the 
Sycamore. 
I will now pass on to consider those weird, strange 
phenomena to which the term (an inappropriate one, as 1 shall 
shew) “ fasciation ’ is usually applied. I hold that they are 
essentially identical in nature with those just enumerated. 
